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.
History

Wed, 28 Oct 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Thu, 22 Oct 2026 12:30:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Important


Wed, 21 Oct 2026 00:45:00 +0000

Type Values Removed Values Added
Description 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.
Title Dulwich 0.24.0 before 1.2.8 Symlink Write-Through via porcelain.checkout paths
First Time appeared Dulwich Project
Dulwich Project dulwich
Weaknesses CWE-59
CPEs cpe:2.3:a:dulwich_project:dulwich:*:*:*:*:*:*:*:*
Vendors & Products Dulwich Project
Dulwich Project dulwich
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 7.3, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-10-21T00:36:59.763Z

Updated: 2026-10-28T13:46:53.993Z

Reserved: 2026-10-20T21:46:55.741Z

Link: CVE-2026-114096

cve-icon Vulnrichment

Updated: 2026-10-28T13:46:47.819Z

cve-icon NVD

Status : Deferred

Published: 2026-10-21T01:17:34.933

Modified: 2026-10-28T14:16:57.093

Link: CVE-2026-114096

cve-icon Redhat

Severity : Important

Publid Date: 2026-10-21T00:36:59Z

Links: CVE-2026-114096 - Bugzilla