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.
12 results
Sep 22, 2026Nuclei is a vulnerability scanner built on a simple YAML-based DSL.CVE-2026-76805 · Other software · projectdiscovery · reported by GitHubMedium 5.3
Nuclei is a vulnerability scanner built on a simple YAML-based DSL. From 3.0.0 until 3.10.0, the DAST/fuzz payload path in pkg/fuzz/parts.go can evaluate substituted runtime data more than once, creating a second evaluation pass that allows response content captured by an internal: true extractor in one protocol step to be reinterpreted as template syntax in a later fuzz step. This vulnerability is an incomplete fix for CVE-2026-41645: the prior remediation made expressions.Evaluate() single-pass within one call but did not prevent DAST/fuzz callers from evaluating substituted output again. When -env-vars is enabled, a malicious scan target can return marker-shaped content that resolves against the template variable map and discloses scanner-host environment variables such as credentials, API keys, or tokens. The vulnerability requires a multi-step DAST or fuzz template, response data reused through an internal extractor, and explicit environment-variable expansion; users who do not enable -env-vars are not affected by the sensitive-information disclosure. This issue is fixed in version 3.10.0.
- Product
- nuclei
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Sep 22, 2026Nuclei is a vulnerability scanner built on a simple YAML-based DSL.CVE-2026-76804 · Other software · projectdiscovery · reported by GitHubMedium 5.5
Nuclei is a vulnerability scanner built on a simple YAML-based DSL. From 3.0.0 until 3.10.0, the workflow template loading path does not enforce the -file capability gate when resolving file: protocol templates referenced by a workflow. An untrusted unsigned workflow can therefore load a file-protocol template and read local files from the scanner host even when the operator has not enabled file templates. The issue affects CLI users running workflows with -w and SDK integrations that accept end-user workflows while relying on the default file-access restriction. This issue is fixed in version 3.10.0.
- Product
- nuclei
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Sep 22, 2026Nuclei is a vulnerability scanner built on a simple YAML-based DSL.CVE-2026-76803 · Other software · projectdiscovery · reported by GitHubMedium 5.3
Nuclei is a vulnerability scanner built on a simple YAML-based DSL. From 3.0.0 until 3.10.0, the nuclei/mysql JavaScript library does not enforce the local-file sandbox when a JavaScript template supplies the allowAllFiles MySQL DSN option. An untrusted javascript: template scanning an attacker-controlled MySQL-compatible endpoint can cause the server to issue LOAD DATA LOCAL INFILE requests for arbitrary paths, after which the scanner's MySQL client reads the files and returns their contents to the server even though -allow-local-file-access is disabled. JavaScript templates can run unsigned and without the -code flag on affected versions, and the bypass affects CLI and SDK deployments that accept untrusted templates. This issue is fixed in version 3.10.0.
- Product
- nuclei
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Sep 22, 2026Nuclei is a vulnerability scanner built on a simple YAML-based DSL.CVE-2026-76802 · Other software · projectdiscovery · reported by GitHubMedium 4.7
Nuclei is a vulnerability scanner built on a simple YAML-based DSL. From 3.0.0 until 3.10.0, the DAST template loading branch does not apply the unsigned code-template signature check before accepting a template that contains both a fuzzing: block and an unsigned code: block. When an operator enables -dast, an untrusted multiprotocol template can place an unsigned code request into the execution queue and run arbitrary shell commands even without -code or a valid cryptographic signature. The issue affects CLI DAST scans and SDK integrations that enable DAST while accepting attacker-supplied templates. This issue is fixed in version 3.10.0.
- Product
- nuclei
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Sep 16, 2026Nuclei versions before 3.11.1 cache template signature verification based only on file modification time without content checksums.CVE-2026-92718 · Other software · projectdiscovery · reported by VulnCheckHigh 7
Nuclei versions before 3.11.1 cache template signature verification based only on file modification time without content checksums. Attackers can replace verified templates with unsigned malicious content and restore the original modification time to bypass signature checks and execute arbitrary operating system commands.
- Product
- nuclei
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 8, 2026Nuclei is a vulnerability scanner built on a simple YAML-based DSL.CVE-2026-41646 · Other software · projectdiscovery · reported by GitHubMedium 5.5
Nuclei is a vulnerability scanner built on a simple YAML-based DSL. From version 3.0.0 to before version 3.8.0, a vulnerability in Nuclei's JavaScript protocol runtime allows JavaScript templates to read local .js and .json files through the require() function, bypassing the default local file access restriction. This issue has been patched in version 3.8.0.
- Product
- nuclei
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 8, 2026Nuclei is a vulnerability scanner built on a simple YAML-based DSL.CVE-2026-41645 · Other software · projectdiscovery · reported by GitHubMedium 5.3
Nuclei is a vulnerability scanner built on a simple YAML-based DSL. From version 3.0.0 to before version 3.8.0, a vulnerability in Nuclei's expression evaluation engine makes it possible for a malicious target server to inject and execute supported DSL expressions. This happens when HTTP response data containing helper/function syntax gets reused by multi-step templates. If the -env-vars / -ev option is explicitly enabled, this can expose host environment variables. That option is off by default, so standard configurations are not affected by the information disclosure risk. This issue has been patched in version 3.8.0.
- Product
- nuclei
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Apr 20, 2026ProjectDiscovery Nuclei 3 before 3.8.0 allows DSL expression injection.CVE-2026-41282 · Other software · ProjectDiscovery · reported by MITREMedium 4
ProjectDiscovery Nuclei 3 before 3.8.0 allows DSL expression injection. This affects use of -env-vars for multi-step templates against untrusted targets (not the default configuration).
- Product
- Nuclei
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Sep 4, 2024Nuclei is a vulnerability scanner powered by YAML based templates.CVE-2024-43405 · Other software · projectdiscovery · reported by GitHubHigh 7.4
Nuclei is a vulnerability scanner powered by YAML based templates. Starting in version 3.0.0 and prior to version 3.3.2, a vulnerability in Nuclei's template signature verification system could allow an attacker to bypass the signature check and possibly execute malicious code via custom code template. The vulnerability is present in the template signature verification process, specifically in the `signer` package. The vulnerability stems from a discrepancy between how the signature verification process and the YAML parser handle newline characters, combined with the way multiple signatures are processed. This allows an attacker to inject malicious content into a template while maintaining a valid signature for the benign part of the template. CLI users are affected if they execute custom code templates from unverified sources. This includes templates authored by third parties or obtained from unverified repositories. SDK Users are affected if they are developers integrating Nuclei into their platforms, particularly if they permit the execution of custom code templates by end-users. The vulnerability is addressed in Nuclei v3.3.2. Users are strongly recommended to update to this ve
- Product
- nuclei
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jul 17, 2024Nuclei is a fast and customizable vulnerability scanner based on simple YAML based DSL.CVE-2024-40641 · Other software · projectdiscovery · reported by GitHubHigh 7.4
Nuclei is a fast and customizable vulnerability scanner based on simple YAML based DSL. In affected versions it a way to execute code template without -code option and signature has been discovered. Some web applications inherit from Nuclei and allow users to edit and execute workflow files. In this case, users can execute arbitrary commands. (Although, as far as I know, most web applications use -t to execute). This issue has been addressed in version 3.3.0. Users are advised to upgrade. There are no known workarounds for this vulnerability.
- Product
- nuclei
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Mar 15, 2024projectdiscovery/nuclei is a fast and customisable vulnerability scanner based on simple YAML based DSL.CVE-2024-27920 · Other software · projectdiscovery · reported by GitHubHigh 7.4
projectdiscovery/nuclei is a fast and customisable vulnerability scanner based on simple YAML based DSL. A significant security oversight was identified in Nuclei v3, involving the execution of unsigned code templates through workflows. This vulnerability specifically affects users utilizing custom workflows, potentially allowing the execution of malicious code on the user's system. This advisory outlines the impacted users, provides details on the security patch, and suggests mitigation strategies. The vulnerability is addressed in Nuclei v3.2.0. Users are strongly recommended to update to this version to mitigate the security risk. Users should refrain from using custom workflows if unable to upgrade immediately. Only trusted, verified workflows should be executed.
- Product
- nuclei
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recorddocs.projectdiscovery.iodocs.projectdiscovery.io
Aug 4, 2023Nuclei is a vulnerability scanner.CVE-2023-37896 · Other software · projectdiscovery · reported by GitHubHigh 7.5
Nuclei is a vulnerability scanner. Prior to version 2.9.9, a security issue in the Nuclei project affected users utilizing Nuclei as Go code (SDK) running custom templates. This issue did not affect CLI users. The problem was related to sanitization issues with payload loading in sandbox mode. There was a potential risk with payloads loading in sandbox mode. The issue occurred due to relative paths not being converted to absolute paths before doing the check for `sandbox` flag allowing arbitrary files to be read on the filesystem in certain cases when using Nuclei from `Go` SDK implementation. This issue has been fixed in version 2.9.9. The maintainers have also enabled sandbox by default for filesystem loading. This can be optionally disabled if required. The `-sandbox` option has been deprecated and is now divided into two new options: `-lfa` (allow local file access) which is enabled by default and `-lna` (restrict local network access) which can be enabled by users optionally. The `-lfa` allows file (payload) access anywhere on the system (disabling sandbox effectively), and `-lna` blocks connections to the local/private network.
- Product
- nuclei
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
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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