CVE-2026-114096

High

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.

SeverityHigh

CVSS7.8

Exploit probability—

ProductDulwich

PublishedOct 21, 2026

First seenOct 21, 2026

Weakness typeCWE-59Improper link resolution

How to fix

Update

dulwich1.2.8 or later

Vendor advisories

github.com/jelmer/dulwich/security/advisories/GHSA-8w8g-wq8h-fq33

Affected products

Product	Affected versions	Fixed in
dulwichPyPI	0.24.0 ≤ v < 1.2.8	1.2.8

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