What is CVE-2026-114096?

CVE-2026-114096 is a high-severity vulnerability in Jelmer Dulwich, classified under Improper Link Resolution Before File Access. CVSS score: 7.8/10. Published 2026-10-21.

How severe is CVE-2026-114096?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Jelmer Dulwich

CVE-2026-114096

Dulwich from 0.24.0 before 1.2.8 contains a symlink following vulnerability in porcelain.checkout(paths=[...]) that allows attackers to write arbitrary files by abusing raw os.open without O_NOFOLLOW. Attackers can craft a repository where a worktree symlink points to .git/hooks/post-checkout, so restoring the file from a tag writes a malicious hook for code execution.

Published 2026-10-21 · last modified 2026-10-21.

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

Jelmer Dulwich

Weakness classification (CWE)

CWE-59 — Improper Link Resolution Before File Access

References

github.com/jelmer/dulwich/security/advisories/GHSA-8w8g-wq8h-fq33 (vendor-advisory)
www.vulncheck.com/advisories/dulwich-0.24.0-before-1.2.8-symlink-write-through-… (third-party-advisory)

Frequently asked questions

What is CVE-2026-114096?: CVE-2026-114096 is a high-severity vulnerability in Jelmer Dulwich, classified under Improper Link Resolution Before File Access. CVSS score: 7.8/10. Published 2026-10-21.
How severe is CVE-2026-114096?: High severity. CVSS v3 base score is 7.8 out of 10.