Joshua van Rijswijk

7 exploits Active since Jan 2026
CVE-2026-23745 NOMISEC MEDIUM WORKING POC
tar < 7.5.3 - Arbitrary File Overwrite and Symlink Poisoning via Hardlink and SymbolicLink Entries
node-tar is a Tar for Node.js. The node-tar library (<= 7.5.2) fails to sanitize the linkpath of Link (hardlink) and SymbolicLink entries when preservePaths is false (the default secure behavior). This allows malicious archives to bypass the extraction root restriction, leading to Arbitrary File Overwrite via hardlinks and Symlink Poisoning via absolute symlink targets. This vulnerability is fixed in 7.5.3.
21 stars
CVSS 6.1
CVE-2026-31802 GITHUB MEDIUM python WORKING POC
tar < 7.5.11 - Path Traversal via Drive-Relative Symlink Target
node-tar is a full-featured Tar for Node.js. Prior to version 7.5.11, tar (npm) can be tricked into creating a symlink that points outside the extraction directory by using a drive-relative symlink target such as C:../../../target.txt, which enables file overwrite outside cwd during normal tar.x() extraction. This vulnerability is fixed in 7.5.11.
10 stars
CVSS 5.5
CVE-2026-29786 GITHUB MEDIUM python WRITEUP
tar < 7.5.10 - Path Traversal via Drive-Relative Hardlink
node-tar is a full-featured Tar for Node.js. Prior to version 7.5.10, tar can be tricked into creating a hardlink that points outside the extraction directory by using a drive-relative link target such as C:../target.txt, which enables file overwrite outside cwd during normal tar.x() extraction. This issue has been patched in version 7.5.10.
10 stars
CVSS 6.3
CVE-2026-31802 NOMISEC MEDIUM WORKING POC
tar < 7.5.11 - Path Traversal via Drive-Relative Symlink Target
node-tar is a full-featured Tar for Node.js. Prior to version 7.5.11, tar (npm) can be tricked into creating a symlink that points outside the extraction directory by using a drive-relative symlink target such as C:../../../target.txt, which enables file overwrite outside cwd during normal tar.x() extraction. This vulnerability is fixed in 7.5.11.
1 stars
CVSS 5.5
CVE-2026-29786 NOMISEC MEDIUM WRITEUP
tar < 7.5.10 - Path Traversal via Drive-Relative Hardlink
node-tar is a full-featured Tar for Node.js. Prior to version 7.5.10, tar can be tricked into creating a hardlink that points outside the extraction directory by using a drive-relative link target such as C:../target.txt, which enables file overwrite outside cwd during normal tar.x() extraction. This issue has been patched in version 7.5.10.
1 stars
CVSS 6.3
CVE-2026-25126 NOMISEC HIGH WORKING POC
PolarLearn <0-PRERELEASE-15 - Info Disclosure
PolarLearn is a free and open-source learning program. Prior to version 0-PRERELEASE-15, the vote API route (`POST /api/v1/forum/vote`) trusts the JSON body’s `direction` value without runtime validation. TypeScript types are not enforced at runtime, so an attacker can send arbitrary strings (e.g., `"x"`) as `direction`. Downstream (`VoteServer`) treats any non-`"up"` and non-`null` value as a downvote and persists the invalid value in `votes_data`. This can be exploited to bypass intended business logic. Version 0-PRERELEASE-15 fixes the vulnerability.
1 stars
CVSS 7.1
CVE-2026-23745 GITHUB MEDIUM python WORKING POC
tar < 7.5.3 - Arbitrary File Overwrite and Symlink Poisoning via Hardlink and SymbolicLink Entries
node-tar is a Tar for Node.js. The node-tar library (<= 7.5.2) fails to sanitize the linkpath of Link (hardlink) and SymbolicLink entries when preservePaths is false (the default secure behavior). This allows malicious archives to bypass the extraction root restriction, leading to Arbitrary File Overwrite via hardlinks and Symlink Poisoning via absolute symlink targets. This vulnerability is fixed in 7.5.3.
CVSS 6.1