Vulnerability database
Every flaw the U.S. government’s cybersecurity agency (CISA) has confirmed attackers are using, plus the new WordPress plugin and theme bugs published each day, sorted by what they mean for a small business. We refresh it twice a day. If you see something your website or office runs, tell us.
19 results
Oct 22, 2026A numeric-type conversion flaw in the BSON handling library of the MongoDB C# Driver allows an out-of-range binary subtype value supplied through untrusted textCVE-2026-114654 · Other software · MongoDB · reported by cna@mongodb.comMedium 6.9
A numeric-type conversion flaw in the BSON handling library of the MongoDB C# Driver allows an out-of-range binary subtype value supplied through untrusted textual input to bypass the library's binary-element integrity checks. When such a value is later encoded, it is narrowed to a smaller wire representation, producing binary elements that misdeclare their type or length. An unauthenticated party able to supply text parsed by an affected application can cause it to emit and persist malformed binary data, which subsequent readers either reject with an error or silently interpret as shorter than the data that was validated.
- Product
- C# Driver
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 22, 2026A client-side encryption schema construction component in the MongoDB C# Driver places caller-supplied field identifiers into a position that is interpreted as CVE-2026-114653 · Other software · MongoDB · reported by cna@mongodb.comHigh 7.1
A client-side encryption schema construction component in the MongoDB C# Driver places caller-supplied field identifiers into a position that is interpreted as a pattern expression, without normalizing or validating them. As a result, an application that designates certain fields for client-side field-level encryption may have the protection silently fail to apply, so data intended to be encrypted is stored and returned in cleartext; conversely, the rule may apply more broadly than intended. No user action is required to cause the condition, and any party with ordinary read access to the stored data — without possession of the encryption keys — can observe the unprotected values.
- Product
- C# Driver
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 22, 2026A data-query-logic neutralization weakness in the update-statement construction component of the MongoDB C# Driver can cause application-supplied values to be iCVE-2026-114652 · Other software · MongoDB · reported by cna@mongodb.comHigh 7.1
A data-query-logic neutralization weakness in the update-statement construction component of the MongoDB C# Driver can cause application-supplied values to be interpreted as query/update logic rather than as literal data. An application user who can influence the content of values that the application passes into the affected builder surface, without any special privilege beyond ordinary read-write application access, may cause stored data to be modified or removed in ways the application never intended. The result is unauthorized integrity impact on the affected application data; there is no direct loss of confidentiality or availability of the database service.
- Product
- C# Driver
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 22, 2026A memory-handling weakness in the BSON deserialization component of the MongoDB C# Driver may cause data left over from previously processed content to be returCVE-2026-114651 · Other software · MongoDB · reported by cna@mongodb.comMedium 6.3
A memory-handling weakness in the BSON deserialization component of the MongoDB C# Driver may cause data left over from previously processed content to be returned when specially crafted serialized input is parsed. An unauthenticated party able to supply serialized data to an application that maps certain primitive collection types can cause residual bytes from unrelated data processed earlier on the same execution thread to be surfaced as legitimate values. This can result in disclosure of a limited amount of information belonging to other requests or principals of the consuming application. No authentication or special privileges within the application are required.
- Product
- C# Driver
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 22, 2026A flaw in the client-side encryption support of the MongoDB .NET/C# driver can cause data designated for client-side field-level encryption to be written withouCVE-2026-114650 · Other software · MongoDB · reported by cna@mongodb.comMedium 6.9
A flaw in the client-side encryption support of the MongoDB .NET/C# driver can cause data designated for client-side field-level encryption to be written without encryption. Under certain platform text-encoding configurations, an internal name conversion loses information, so the encryption layer fails to associate the operation with its configured encryption rules and the operation proceeds without an error being raised. An application user with the ability to write data through an affected application can therefore have sensitive fields persisted in plaintext, defeating the confidentiality guarantee that client-side encryption is intended to provide. No integrity or availability impact was observed.
- Product
- C# Driver
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 22, 2026The MongoDB C# Driver compares TLS client certificates by issuer and serial number only when deciding whether two clients can share cached connections.CVE-2026-114649 · Other software · MongoDB · reported by cna@mongodb.comHigh 7.6
The MongoDB C# Driver compares TLS client certificates by issuer and serial number only when deciding whether two clients can share cached connections. In an application that creates clients from certificates supplied by different users, a user who provides a certificate copying another user's issuer and serial number, without that user's private key, can be given connections authenticated with the other user's certificate. Database operations can then run under the other user's identity, affecting the confidentiality and integrity of data that identity can access.
- Product
- C# Driver
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 22, 2026The MongoDB C# Driver does not neutralize dot and dollar characters in dictionary keys, field names and array-filter identifiers used in LINQ queries before plaCVE-2026-114648 · Other software · MongoDB · reported by cna@mongodb.comHigh 7.2
The MongoDB C# Driver does not neutralize dot and dollar characters in dictionary keys, field names and array-filter identifiers used in LINQ queries before placing them into the field paths it sends to the server. An application user whose input reaches these positions can redirect a query or update to fields the application did not name, which can expose other users' documents and widen updates beyond the intended data. Certain values can also write malformed fields that leave stored documents unreadable by the application until they are repaired.
- Product
- C# Driver
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 22, 2026The MongoDB C# Driver does not reject replacement documents whose top-level field names begin with a dollar sign in FindOneAndReplace, unlike other replace operCVE-2026-114647 · Other software · MongoDB · reported by cna@mongodb.comMedium 5.3
The MongoDB C# Driver does not reject replacement documents whose top-level field names begin with a dollar sign in FindOneAndReplace, unlike other replace operations. An application that builds such a document from user-supplied field names can have the server apply update operators instead of a full replacement. The effect is limited to the document matched by the application's own filter, whose contents can be modified in ways the application did not intend.
- Product
- C# Driver
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 22, 2026A data-validation flaw exists in the BSON handling and binary serialization path of the MongoDB C# Driver.CVE-2026-114646 · Other software · MongoDB · reported by cna@mongodb.comMedium 6.9
A data-validation flaw exists in the BSON handling and binary serialization path of the MongoDB C# Driver. When an application constructs a raw or lazy BSON document object from externally supplied binary data, the driver does not verify that the size quantity declared inside that data matches the amount of data actually provided, and it copies the data onto the wire unchanged. An unauthenticated party who can supply binary content to such an application can thereby cause additional elements to be inserted into, or existing elements to be removed from, the database command the application issues, without needing any database credentials of their own. This can result in unauthorized modification of stored data and disclosure of data outside the intended scope of the application's request, bounded by the database privileges the application itself holds.
- Product
- C# Driver
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 22, 2026The MongoDB C# Driver's BSON library contains an uncontrolled resource consumption weakness in its deserialization handling of one BSON value type.CVE-2026-114644 · Other software · MongoDB · reported by cna@mongodb.comHigh 8.2
The MongoDB C# Driver's BSON library contains an uncontrolled resource consumption weakness in its deserialization handling of one BSON value type. An application that deserializes untrusted content with the library retains data derived from that content for the lifetime of the process, with no limit on how much accumulates. An unauthenticated remote party who can cause such content to be deserialized can drive unbounded memory growth, exhausting the host application's available memory and denying service. There is no impact to confidentiality or integrity, and no MongoDB server component is affected.
- Product
- C# Driver
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 22, 2026The MongoDB C# Driver writes GeoJSON extra members without checking whether their names collide with reserved GeoJSON members such as type and coordinates.CVE-2026-114643 · Other software · MongoDB · reported by cna@mongodb.comMedium 5.3
The MongoDB C# Driver writes GeoJSON extra members without checking whether their names collide with reserved GeoJSON members such as type and coordinates. An application that places user-supplied field names into these extra members can store documents with duplicate geometry fields, so the server and the driver resolve different values for the same record. Affected records can also become unreadable through the driver, interrupting application code that reads them.
- Product
- C# Driver
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Sep 10, 2026Improper neutralization of regular-expression metacharacters in the LINQ query translation component of the MongoDB C# Driver can cause a caller-supplied characCVE-2026-88026 · Other software · MongoDB · reported by cna@mongodb.comHigh 7.1
Improper neutralization of regular-expression metacharacters in the LINQ query translation component of the MongoDB C# Driver can cause a caller-supplied character sequence to alter a regular-expression predicate generated by an affected application. An authenticated user who can influence such a value may cause the application to return records beyond those intended by the original filter.
- Product
- C# Driver
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Sep 10, 2026Improper neutralization of special elements in data query logic in the GridFS component of the MongoDB C# Driver can cause a caller-supplied structured file ideCVE-2026-88025 · Other software · MongoDB · reported by cna@mongodb.comMedium 6.1
Improper neutralization of special elements in data query logic in the GridFS component of the MongoDB C# Driver can cause a caller-supplied structured file identifier to be interpreted as a query condition rather than as a literal identifier. An authenticated user who can influence the identifier passed by an affected application may obtain stored file content beyond the intended target or cause all GridFS file chunks in the affected bucket to be removed, rendering stored file content unreadable. The affected rename operation may also rename a stored file other than the intended target.
- Product
- C# Driver
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Aug 27, 2026A weakness in the client-side encryption configuration surface of the MongoDB C# Driver causes sensitive key-management credential material supplied by the applCVE-2026-81530 · Other software · MongoDB · reported by cna@mongodb.comMedium 6.8
A weakness in the client-side encryption configuration surface of the MongoDB C# Driver causes sensitive key-management credential material supplied by the application to be reproduced verbatim in the driver's human-readable diagnostic representation of its client settings, instead of being masked as other secret fields are. A party able to read the application's logs, diagnostic output, or a process memory dump may thereby recover the plaintext credentials and use them to decrypt protected field data.
- Product
- C# Driver
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordjira.mongodb.orgnuget.org
Aug 27, 2026Improper neutralization of delimiters in connection-URL construction allows connection-option injection in the MongoDB C# Driver.CVE-2026-81529 · Other software · MongoDB · reported by cna@mongodb.comHigh 7.1
Improper neutralization of delimiters in connection-URL construction allows connection-option injection in the MongoDB C# Driver. When an application passes untrusted text into the driver's connection-URL builder and round-trips the builder back into a client configuration, the untrusted text is serialized without neutralizing the URL/option delimiters and is then re-parsed as authoritative connection options. A low-privileged user of such an application can thereby introduce or suppress security-relevant connection settings.
- Product
- C# Driver
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordjira.mongodb.orgnuget.org
Aug 27, 2026A MongoDB C# driver document-replacement code path omits the element-name/shape validation that the equivalent write paths apply, so a value supplied as a replaCVE-2026-81528 · Other software · MongoDB · reported by cna@mongodb.comMedium 5.3
A MongoDB C# driver document-replacement code path omits the element-name/shape validation that the equivalent write paths apply, so a value supplied as a replacement is forwarded to the server without neutralization of query-language special elements. An application that passes untrusted, loosely-typed input as a replacement value therefore allows that input to be interpreted by the database as update logic rather than as data, executing under the application's own database credentials. Applications using strongly-typed document mappings are not affected.
- Product
- C# Driver
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordjira.mongodb.orgnuget.org
Aug 27, 2026A NoSQL/expression injection weakness exists in the LINQ-to-aggregation query translation layer of the MongoDB C# Driver, in both aggregation expression and queCVE-2026-81527 · Other software · MongoDB · reported by cna@mongodb.comMedium 6.9
A NoSQL/expression injection weakness exists in the LINQ-to-aggregation query translation layer of the MongoDB C# Driver, in both aggregation expression and query filter translation. When application-supplied values are embedded in certain query constructs, special elements contained within those values are not properly escaped before the resulting query is transmitted to the database, so portions of the value may be interpreted by the database as query logic rather than as data. A user able to supply values that an application incorporates into an affected query may thereby cause unintended data to be returned or query results to be altered.
- Product
- C# Driver
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordjira.mongodb.orgnuget.org
Feb 21, 2023Under very specific circumstances (see Required configuration section below), a privileged user is able to cause arbitrary code to be executed which may cause fCVE-2022-48282 · Other software · MongoDB Inc · reported by cna@mongodb.comMedium 6.6
Under very specific circumstances (see Required configuration section below), a privileged user is able to cause arbitrary code to be executed which may cause further disruption to services. This is specific to applications written in C#. This affects all MongoDB .NET/C# Driver versions prior to and including v2.18.0 Following configuration must be true for the vulnerability to be applicable: * Application must written in C# taking arbitrary data from users and serializing data using _t without any validation AND * Application must be running on a Windows host using the full .NET Framework, not .NET Core AND * Application must have domain model class with a property/field explicitly of type System.Object or a collection of type System.Object (against MongoDB best practice) AND * Malicious attacker must have unrestricted insert access to target database to add a _t discriminator."Following configuration must be true for the vulnerability to be applicable
- Product
- MongoDB .NET/C# Driver
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgithub.comjira.mongodb.org
May 13, 2021Specific versions of the MongoDB C# Driver may erroneously publish events containing authentication-related data to a command listener configured by an applicatCVE-2021-20331 · Other software · MongoDB Inc. · reported by cna@mongodb.comMedium 4.2
Specific versions of the MongoDB C# Driver may erroneously publish events containing authentication-related data to a command listener configured by an application. The published events may contain security-sensitive data when commands such as "saslStart", "saslContinue", "isMaster", "createUser", and "updateUser" are executed. Without due care, an application may inadvertently expose this authenticated-related information, e.g., by writing it to a log file. This issue only arises if an application enables the command listener feature (this is not enabled by default). This issue affects the MongoDB C# Driver v2.12 versions prior to and including 2.12.1.
- Product
- MongoDB C# Driver
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordjira.mongodb.orgjira.mongodb.org
Where this comes from: the exploited list is CISA’s Known Exploited Vulnerabilities catalog. Everything else is the whole National Vulnerability Database, where each record is published by the team that found the bug (Wordfence, Patchstack, WPScan, the vendors themselves and others); we show who. Exploit odds are FIRST’s EPSS, updated daily. Titles and categories are ours, so check the linked record before acting on a detail. For a write-up of the big ones, see our advisories. Every vendor, and every WordPress plugin and theme with a recorded flaw, also has its own page. All of it is free to reuse as JSON, CSV or RSS.
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