CVE-2026-114095

Medium

Description

Dulwich before 1.2.9 contains a denial of service vulnerability in Pack.resolve_object that allows attackers to cause infinite recursion via self-referential OFS_DELTA objects. Attackers can supply a malicious packfile with an OFS_DELTA delta_offset of 0 to exhaust CPU during clone, fetch, or cat-file operations.

SeverityMedium

CVSS6.5

Exploit probability—

ProductDulwich

PublishedOct 21, 2026

First seenOct 21, 2026

Weakness typeCWE-835CWE-835

How to fix

Update

dulwich1.2.9 or later

Vendor advisories

github.com/jelmer/dulwich/security/advisories/GHSA-35mr-4567-66vg

Affected products

Product	Affected versions	Fixed in
dulwichPyPI	v < 1.2.9	1.2.9

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