Infinite loop Affecting dulwich package, versions [,1.2.9)
Threat Intelligence
Exploit Maturity
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
Proof of Concept
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Test your applications- Snyk IDSNYK-PYTHON-DULWICH-20416729
- published4 Oct 2026
- disclosed2 Oct 2026
- creditLukeBanto
Introduced: 2 Oct 2026
New CVE NOT AVAILABLE CWE-835 (opens in a new tab)Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade dulwich to version 1.2.9 or higher.
Overview
Affected versions of this package are vulnerable to Infinite loop via unpack_object in dulwich/pack.py when parsing a pack file containing an OFS_DELTA entry whose delta_base_offset is zero. Such an entry references itself, causing Pack.resolve_object to loop forever, growing its delta stack until the process exhausts all available memory.