CVE-2026-16044 Insufficient validation of guest board admin privileges on archive import

Mattermost versions 11.7.x = 11.7.6, 10.11.x = 10.11.21 fail to prevent guest users from receiving Board Admin privileges during board archive import which allows a board member to escalate a guest user to Board Admin via importing a crafted .boardarchive file. Mattermost Advisory ID:...

CVE-2026-16044

Mattermost versions 11.7.6 and 10.11.21 fail to validate guest user privileges during board archive import, allowing a board member to escalate a guest user to Board Admin via a crafted .boardarchive file. CVSS 5.4 (MEDIUM). No exploitation details or patch version are provided. Upgrade to a fixe...

DEBIAN-CVE-2026-19693

extract-zip through 2.0.1 containment-checks only the parent directory of each archive entry and never the entry's own final path component, so an archive containing two entries with identical names - a symlink whose target is outside the destination, followed by a regular file - writes through t...

CVE-2026-19693

extract-zip through 2.0.1 containment-checks only the parent directory of each archive entry and never the entry's own final path component, so an archive containing two entries with identical names - a symlink whose target is outside the destination, followed by a regular file - writes through t...

UBUNTU-CVE-2026-19693

extract-zip through 2.0.1 containment-checks only the parent directory of each archive entry and never the entry's own final path component, so an archive containing two entries with identical names - a symlink whose target is outside the destination, followed by a regular file - writes through t...

CVE-2026-19693

extract-zip through 2.0.1 containment-checks only the parent directory of each archive entry and never the entry's own final path component, so an archive containing two entries with identical names - a symlink whose target is outside the destination, followed by a regular file - writes through t...

CVE-2026-19693

extract-zip through 2.0.1 containment-checks only the parent directory of each archive entry and never the entry's own final path component, so an archive containing two entries with identical names - a symlink whose target is outside the destination, followed by a regular file - writes through t...

EUVD-2026-60194

extract-zip through 2.0.1 containment-checks only the parent directory of each archive entry and never the entry's own final path component, so an archive containing two entries with identical names - a symlink whose target is outside the destination, followed by a regular file - writes through t...

CVE-2026-19693

extract-zip (Node.js npm package, versions through 2.0.1) fails to validate the final path component of each archive entry, only checking the parent directory. A crafted zip archive with two identically-named entries—one a symlink pointing outside the destination, the second a regular file—causes...

CVE-2026-19693 extract-zip arbitrary file write outside the destination directory via a symlink at the final path component

extract-zip through 2.0.1 containment-checks only the parent directory of each archive entry and never the entry's own final path component, so an archive containing two entries with identical names - a symlink whose target is outside the destination, followed by a regular file - writes through t...

Zip Slip Path Traversal

org.springframework.data, spring-data-geode is vulnerable to a Zip Slip Path Traversal. The vulnerability is due to improper validation of file paths during ZIP archive extraction, which allows an attacker to craft a malicious archive containing traversal paths and write files outside the intende...

BIT-JENKINS-2026-70427

Jenkins 2.575 and earlier, LTS 2.568.1 and earlier does not safely handle symbolic links with effectively empty names during the extraction of .tar and .tar.gz archives, allowing attackers able to control agent processes to provide crafted archives to the controller to write files to arbitrary...

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Vuln-Archive Skill A Claude Codehttps://claude.com/product...

PT-2026-76655

Name of the Vulnerable Software and Affected Versions extract-zip versions prior to 2.0.2 Description Containment checks only verify the parent directory of each archive entry and ignore the entry's own final path component. This allows an archive containing two entries with identical names—a...

7-Zip 26.01 XZ Decoder Heap Buffer Overflow

7-Zip 26.01 contains a heap buffer overflow vulnerability in the XZ decoder that can be triggered while processing a specially crafted XZ archive. This proof of concept generates a malformed XZ file designed to reproduce the crash condition in the vulnerable multi-threaded XZ decompression path...

PT-2026-73368

Circular symbolic links in phar archives could lead to unbounded recursion, exhausting the C stack and crashing the PHP process, in PHP versions from 8.2. before 8.2.33, from 8.3. before 8.3.33, from 8.4. before 8.4.24, and from 8.5. before 8.5.9...

CVE-2026-9816: Incorrect Authorization

Mattermost versions 11.7.x = 11.7.6, 10.11.x = 10.11.21, 11.8.x = 11.8.3 fail to validate BoardMember.Scheme fields server-side on insert and archive-import paths which allows a board editor or non-guest team member to grant board admin to arbitrary users via POST /api/v2/boards/boardID/members a...

CVE-2026-16044: Incorrect Authorization

Mattermost versions 11.7.x = 11.7.6, 10.11.x = 10.11.21 fail to prevent guest users from receiving Board Admin privileges during board archive import which allows a board member to escalate a guest user to Board Admin via importing a crafted .boardarchive file. Mattermost Advisory ID:...

PT-2026-76876

Name of the Vulnerable Software and Affected Versions Mattermost versions 11.7.0 through 11.7.6 Mattermost versions 10.11.0 through 10.11.21 Mattermost versions 11.8.0 through 11.8.3 Description Insufficient server-side validation of BoardMember.Scheme fields during insert and archive-import...

PT-2026-76669

Mattermost versions 11.7.x = 11.7.6, 10.11.x = 10.11.21 fail to prevent guest users from receiving Board Admin privileges during board archive import which allows a board member to escalate a guest user to Board Admin via importing a crafted .boardarchive file. Mattermost Advisory ID:...