CVE-2026-114097 Dulwich 0.23.1 before 1.2.8 Symlink Path Traversal via filter_branch Index Filter
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-114097?
CVE-2026-114097 is a high-severity vulnerability in jelmer dulwich, published on 21 Oct 2026.
Official description
Dulwich from 0.23.1 before 1.2.8 contains a path traversal vulnerability in CommitFilter._apply_index_filter() that allows attackers to write files outside the working directory via symlinks persisting between commits. Attackers can craft a repository where an ancestor commit's symlink redirects a descendant commit's file writes during filter_branch, enabling code execution by writing into .git/hooks.
Weakness: CWE-22
Which versions are affected by CVE-2026-114097?
2 open source packages ship an affected version, including dulwich.
| Package | Affected | Fixed in |
|---|---|---|
dulwich PyPI | From 0.23.1 | 1.2.8 |
dulwich PyPI | From 0.23.1 | 1.2.8 |
How do I fix CVE-2026-114097?
Upgrade dulwich to 1.2.8 or later.
Is CVE-2026-114097 being exploited?
There is no known exploitation of CVE-2026-114097 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-114097, ECHO-7c50-8db2-9fd8, GHSA-4hjw-xcwg-8xfj, GHSA-5fqc-mrg8-w798, MINI-5c5m-hq9j-pr77, MINI-rwj7-4gcx-62h9 and 1 more.