OS Command Injection Affecting py3.12-dulwich-bin package, versions <1.2.5-r0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-MINIMOSLATEST-PY312DULWICHBIN-19162397
- published22 Aug 2026
- disclosed10 Jun 2026
Introduced: 10 Jun 2026
CVE-2026-42563 (opens in a new tab)How to fix?
Upgrade Minimos:latest py3.12-dulwich-bin to version 1.2.5-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream py3.12-dulwich-bin package and not the py3.12-dulwich-bin package as distributed by Minimos.
See How to fix? for Minimos:latest relevant fixed versions and status.
Dulwich is a pure-Python implementation of the Git file formats and protocols. Starting in version 0.24.0 and prior to version 1.2.5, Dulwich's ProcessMergeDriver substitutes the file path (from the git tree, controllable by an attacker via a malicious branch) into the merge driver command via the %P placeholder and executes it with subprocess.run(..., shell=True). An attacker who can cause a victim to merge an untrusted branch can achieve arbitrary command execution by crafting malicious file paths. Version 1.2.5 fixes the issue.
References
- https://www.cve.org/CVERecord?id=CVE-2026-42563
- https://github.com/advisories/GHSA-9277-mp7x-85jf
- https://osv.dev/vulnerability/MINI-2p86-fr3m-g34v
- https://osv.dev/vulnerability/CVE-2026-42563
- https://github.com/jelmer/dulwich/commit/e3331b3b3a122fc313460182f928f59723580b7b
- https://github.com/jelmer/dulwich/releases/tag/dulwich-1.2.5
- https://github.com/jelmer/dulwich/security/advisories/GHSA-9277-mp7x-85jf