GHSA-xpf3-p7gm-7756
BBOT's Symlink guard bypass in unarchive module allows planting symlinks during extraction
Packages
Details
As written in the advisory (Markdown source, shown as plain text).
BBOT's `unarchive` module rejects archives containing symlink entries before extraction, but for zip and 7z archives it failed to detect symlinks whose listing carries a DOS-attribute prefix before the unix mode, as produced by legacy versions of p7zip. Such an archive, downloaded and extracted during a scan (for example via `filedownload`), bypassed the guard and caused an attacker-controlled symlink to be written into the extraction directory. The effect is limited to planting the symlink (its target is not written through), and only hosts using such a legacy p7zip build are affected; current mainline 7-Zip is not.
References
External links from the advisory. They lead to third-party sites.
- https://github.com/blacklanternsecurity/bbot/security/advisories/GHSA-xpf3-p7gm-7756
- https://nvd.nist.gov/vuln/detail/CVE-2026-14966
- https://github.com/blacklanternsecurity/bbot/commit/3bc8d3a96f34f312853c9fcf8decee2a4e905f26
- https://github.com/blacklanternsecurity/bbot/commit/a3f1a2292e2b0a553827c6175b761abe28807735
- https://github.com/blacklanternsecurity/bbot
- https://github.com/pypa/advisory-database/tree/main/vulns/bbot/PYSEC-2026-3719.yaml