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
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | bbot | >= 2.3.1, < 3.0.0 | 3.0.0 |
References
- https://github.com/blacklanternsecurity/bbot/commit/a3f1a2292e2b0a553827c6175b761abe28807735
- 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
- https://github.com/pypa/advisory-database/tree/main/vulns/bbot/PYSEC-2026-3719.yaml
- https://github.com/advisories/GHSA-xpf3-p7gm-7756
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N- Weakness (CWE)
CWE-22, CWE-59- Platform
- Python (PyPI)
- Package
bbot- Disclosed
- 08.07.2026
- Updated
- 15.10.2026 18:17
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2026-3719 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-xpf3-p7gm-7756 - CC BY 4.0
Vulnerability history: bbot
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 10
- First → latest
- 10.2025 07.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 2
- Medium 4
- Low 4
Disclosures per year
- 2025: 4
- 2026: 6
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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 this entry
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