Path Traversal in Jelmer Dulwich
CVE-2026-114097
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/jelmer/dulwich/security/advisories/GHSA-5fqc-mrg8-w798 (vendor-advisory)
- www.vulncheck.com/advisories/dulwich-0.23.1-before-1.2.8-symlink-path-traversal… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-114097?
- CVE-2026-114097 is a high-severity vulnerability in Jelmer Dulwich, classified under Path Traversal. CVSS score: 7.8/10. Published 2026-10-21.
- How severe is CVE-2026-114097?
- High severity. CVSS v3 base score is 7.8 out of 10.