CVE-2026-114097

High

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.

SeverityHigh

CVSS7.8

Exploit probability—

ProductDulwich

PublishedOct 21, 2026

First seenOct 21, 2026

Weakness typeCWE-22Path traversal

How to fix

Update

dulwich1.2.8 or later

Vendor advisories

github.com/jelmer/dulwich/security/advisories/GHSA-5fqc-mrg8-w798

Affected products

Product	Affected versions	Fixed in
dulwichPyPI	0.23.1 ≤ v < 1.2.8	1.2.8

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