CVE-2026-12565
BBOT: Path traversal (Zip-Slip) in unarchive module - incomplete fix for CVE-2025-10284
Description
The `unarchive` internal module's archive extraction commands perform no code-level validation on extracted file paths, relying entirely on the behavior of external tools (e.g. GNU tar) which varies by platform. While CVE-2025-10284 addressed git-specific RCE vectors, the underlying archive extraction path traversal was never fixed. On systems with GNU tar < 1.34 (Ubuntu 20.04, Debian Buster, CentOS 7, many Docker base images), a malicious archive can write files outside the intended extraction directory.
How to fix CVE-2026-12565
To remediate CVE-2026-12565, upgrade the affected package to a fixed version below.
- —upgrade to 2.8.5 or later
Is CVE-2026-12565 being exploited?
No exploitation signal available. Neither CISA KEV nor a current EPSS score has been published for CVE-2026-12565.
Affected packages (1)
- >= 2.3.1, < 2.8.5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N |