CVE-2026-114095 Details
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.
A denial-of-service vulnerability has been identified in Dulwich versions prior to 1.2.9. The issue arises in the 'Pack.resolve_object' method, where attackers can cause infinite recursion by supplying a malicious packfile with self-referential OFS_DELTA objects. Specifically, an OFS_DELTA delta_offset of 0 leads to infinite recursion, exhausting CPU resources during 'clone', 'fetch', or 'cat-file' operations. This behavior not only crashes the process but also violates the Git packfile specification, which the standard 'git' C client guards against.
Users can upgrade to Dulwich version 1.2.9 or later to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 21, 2026CISA-ADP
Assessed Oct 21, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/jelmer/dulwich/security/advisories/GHSA-35mr-4567-66vg | [email protected] | AdvisoryExploitRemedyVendor |
| https://www.vulncheck.com/advisories/dulwich-before-1.2.9-infinite-loop-dos-via-pack-resolve-object | [email protected] | AdvisoryVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-835 | Loop with Unreachable Exit Condition ('Infinite Loop') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Dulwich | < 1.2.9 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 21, 2026 | CVE Modified | CISA-ADP |
| Oct 21, 2026 | New CVE Received | [email protected] |