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.
16 results
Jul 8, 2026py7zr is a Python-based library and utility to support 7zip archive compression, decompression, encryption and decryption.CVE-2026-55206 · Other software · miurahr · reported by GitHubHigh 8.7
py7zr is a Python-based library and utility to support 7zip archive compression, decompression, encryption and decryption. Prior to 1.1.3, PackInfo._read() in archiveinfo.py used an O(n^2) cumulative sum pattern for attacker-controlled numstreams values parsed from archive headers, allowing a crafted .7z archive to cause excessive CPU consumption during SevenZipFile.init() before extraction. This issue is fixed in version 1.1.3.
- Product
- py7zr
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jul 8, 2026py7zr is a Python-based library and utility to support 7zip archive compression, decompression, encryption and decryption.CVE-2026-55195 · Other software · miurahr · reported by GitHubHigh 8.7
py7zr is a Python-based library and utility to support 7zip archive compression, decompression, encryption and decryption. Prior to 1.1.3, py7zr's Worker.decompress() extracted archive entries without tracking total decompressed size, allowing a crafted .7z file such as a 15.6 KB archive that expands to 100 MB to exhaust disk or memory before extraction completes. This issue is fixed in version 1.1.3.
- Product
- py7zr
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 24, 2026py7zr is a Python-based library and utility to support 7zip archive compression, decompression, encryption and decryption.CVE-2026-23879 · Other software · miurahr · reported by GitHubHigh 8
py7zr is a Python-based library and utility to support 7zip archive compression, decompression, encryption and decryption. Versions 1.1.2 and below contain an an arbitrary file write vulnerability, which allows symbolic links to be recreated outside the destination directory via crafted malicious symbolic link chains. When using extractall to extract an archive, the library restores these symbolic links, linking them to arbitrary directories on the host file system. During extraction, the program only checks the link arcname within the destination directory, but ignores the combined symlink path resolution. Attackers can exploit this vulnerability by constructing malicious archives, thereby bypassing the directory boundary restrictions implemented by the extractor. Subsequent extraction of regular files through these symbolic links can result in arbitrary file writes. This vulnerability may lead to remote code execution, privilege escalation, data corruption, or denial of service. This issue has been fixed in version 1.1.3.
- Product
- py7zr
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 18, 2026Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to validate 7zip archive structure before processing which allows an authenticaCVE-2026-6340 · Other software · Mattermost · reported by responsibledisclosure@mattermost.comMedium 4.3
Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to validate 7zip archive structure before processing which allows an authenticated attacker to cause server memory exhaustion and denial of service via uploading a specially crafted 7zip file with excessive folder declarations.. Mattermost Advisory ID: MMSA-2026-00573
- Product
- Mattermost
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jul 3, 2024The NtfsHandler.cpp NTFS handler in 7-Zip before 24.01 (for 7zz) contains a heap-based buffer overflow that allows an attacker to overwrite two bytes at multiplCVE-2023-52168 · Other software · 7-zip · reported by MITREHigh 8.4
The NtfsHandler.cpp NTFS handler in 7-Zip before 24.01 (for 7zz) contains a heap-based buffer overflow that allows an attacker to overwrite two bytes at multiple offsets beyond the allocated buffer size: buffer+512*i-2, for i=9, i=10, i=11, etc.
- Product
- 7zip
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Aug 22, 2023p7zip 16.02 was discovered to contain a heap-buffer-overflow vulnerability via the function NArchive::NZip::CInArchive::FindCd(bool) at CPP/7zip/Archive/Zip/ZipCVE-2022-47069 · Other software · 7-zip · reported by MITREHigh 7.8
p7zip 16.02 was discovered to contain a heap-buffer-overflow vulnerability via the function NArchive::NZip::CInArchive::FindCd(bool) at CPP/7zip/Archive/Zip/ZipIn.cpp. NOTE: the Supplier has found that this is not a buffer overflow; at most an out-of-bounds read can occur.
- Product
- P7zip
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordsourceforge.netsourceforge.net
Feb 4, 2019libarchive version commit bf9aec176c6748f0ee7a678c5f9f9555b9a757c1 onwards (release v3.0.2 onwards) contains a CWE-125: Out-of-bounds Read vulnerability in 7zipCVE-2019-1000019 · Other software · Libarchive · reported by MITREMedium 6.5
libarchive version commit bf9aec176c6748f0ee7a678c5f9f9555b9a757c1 onwards (release v3.0.2 onwards) contains a CWE-125: Out-of-bounds Read vulnerability in 7zip decompression, archive_read_support_format_7zip.c, header_bytes() that can result in a crash (denial of service). This attack appears to be exploitable via the victim opening a specially crafted 7zip file.
- Product
- Libarchive
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordlists.opensuse.orglists.opensuse.org
Jan 31, 2018Insufficient exception handling in the method NCompress::NRar3::CDecoder::Code of 7-Zip before 18.00 and p7zip can lead to multiple memory corruptions within thCVE-2018-5996 · Other software · 7-zip · reported by MITREHigh 7.8
Insufficient exception handling in the method NCompress::NRar3::CDecoder::Code of 7-Zip before 18.00 and p7zip can lead to multiple memory corruptions within the PPMd code, allows remote attackers to cause a denial of service (segmentation fault) or execute arbitrary code via a crafted RAR archive.
- Product
- 7-zip
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordsecuritytracker.com0patch.blogspot.si
Jan 30, 2018Heap-based buffer overflow in the NCompress::NShrink::CDecoder::CodeReal method in 7-Zip before 18.00 and p7zip allows remote attackers to cause a denial of serCVE-2017-17969 · Other software · 7-zip · reported by MITREHigh 7.8
Heap-based buffer overflow in the NCompress::NShrink::CDecoder::CodeReal method in 7-Zip before 18.00 and p7zip allows remote attackers to cause a denial of service (out-of-bounds write) or potentially execute arbitrary code via a crafted ZIP archive.
- Product
- 7-zip
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordsecuritytracker.com0patch.blogspot.si
Feb 15, 2017The read_Header function in archive_read_support_format_7zip.c in libarchive 3.2.1 allows remote attackers to cause a denial of service (out-of-bounds read) viaCVE-2016-8689 · Other software · Libarchive · reported by MITREHigh 7.5
The read_Header function in archive_read_support_format_7zip.c in libarchive 3.2.1 allows remote attackers to cause a denial of service (out-of-bounds read) via multiple EmptyStream attributes in a header in a 7zip archive.
- Product
- Libarchive
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordlists.opensuse.orgopenwall.com
Dec 13, 2016Heap-based buffer overflow in the NArchive::NHfs::CHandler::ExtractZlibFile method in 7zip before 16.00 and p7zip allows remote attackers to execute arbitrary cCVE-2016-2334 · Other software · 7-zip · reported by cret@cert.orgHigh 7.8
Heap-based buffer overflow in the NArchive::NHfs::CHandler::ExtractZlibFile method in 7zip before 16.00 and p7zip allows remote attackers to execute arbitrary code via a crafted HFS+ image.
- Product
- 7-zip
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordblog.talosintel.comblog.talosintelligence.com
Nov 11, 2016A null pointer dereference bug affects the 16.02 and many old versions of p7zip.CVE-2016-9296 · Other software · 7-zip · reported by MITREHigh 7.5
A null pointer dereference bug affects the 16.02 and many old versions of p7zip. A lack of null pointer check for the variable folders.PackPositions in function CInArchive::ReadAndDecodePackedStreams in CPP/7zip/Archive/7z/7zIn.cpp, as used in the 7z.so library and in 7z applications, will cause a crash and a denial of service when decoding malformed 7z files.
- Product
- P7zip
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordsecurityfocus.comgithub.com
Sep 21, 2016Integer overflow in the read_SubStreamsInfo function in archive_read_support_format_7zip.c in libarchive before 3.2.1 allows remote attackers to execute arbitraCVE-2016-4300 · Other software · Libarchive · reported by cret@cert.orgHigh 7.8
Integer overflow in the read_SubStreamsInfo function in archive_read_support_format_7zip.c in libarchive before 3.2.1 allows remote attackers to execute arbitrary code via a 7zip file with a large number of substreams, which triggers a heap-based buffer overflow.
- Product
- Libarchive
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordblog.talosintel.comrhn.redhat.com
Sep 20, 2016The read_CodersInfo function in archive_read_support_format_7zip.c in libarchive before 3.2.0 allows remote attackers to cause a denial of service (NULL pointerCVE-2015-8922 · Other software · Libarchive · reported by MITREMedium 5.5
The read_CodersInfo function in archive_read_support_format_7zip.c in libarchive before 3.2.0 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a crafted 7z file, related to the _7z_folder struct.
- Product
- Libarchive
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordlists.opensuse.orgrhn.redhat.com
Jun 7, 2016The CInArchive::ReadFileItem method in Archive/Udf/UdfIn.cpp in 7zip 9.20 and 15.05 beta and p7zip allows remote attackers to cause a denial of service (out-of-CVE-2016-2335 · Other software · Opensuse · reported by cret@cert.orgHigh 8.8
The CInArchive::ReadFileItem method in Archive/Udf/UdfIn.cpp in 7zip 9.20 and 15.05 beta and p7zip allows remote attackers to cause a denial of service (out-of-bounds read) or execute arbitrary code via the PartitionRef field in the Long Allocation Descriptor in a UDF file.
- Product
- Opensuse
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordblog.talosintel.comlists.opensuse.org
Jan 21, 2015p7zip 9.20.1 allows remote attackers to write to arbitrary files via a symlink attack in an archive.CVE-2015-1038 · Other software · Fedoraproject · reported by MITREMedium 5.8
p7zip 9.20.1 allows remote attackers to write to arbitrary files via a symlink attack in an archive.
- Product
- Fedora
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordlists.fedoraproject.orglists.fedoraproject.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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