high · 7.1 Patched

Dulwich before 1.2.9 Infinite Loop DoS via Pack.resolve_object

CVE-2026-114095 · GHSA-35mr-4567-66vg · published 2 Oct 2026

How serious is it

Severity: high, CVSS score 7.1 out of 10.
No exploit prediction (EPSS) score yet.
Not on the CISA list of exploited vulnerabilities.
No public exploit in Exploit-DB.

Is your app affected by CVE-2026-114095?

Paste this prompt into Claude Code, Cursor or any AI coding tool: it runs a free Shippable scan of your project and fixes what it finds. Built with Lovable, Bolt or v0? Scan your live app. Or upload your package file.

Who is affected

dulwich (PyPI) < 1.2.9

How to check

Run pip show dulwich in your project to see the installed version, including copies pulled in by other packages.
Or paste your lockfile into the checker: it lists every package with a known vulnerability, this one included.
Or run npx shippable-dev scan localhost:3000 in your project folder. It reads your lockfile and flags this vulnerability along with every other known one.

How to fix

Copies a prompt for Claude Code, Cursor or Codex: it checks your lockfiles for this and upgrades it.

Upgrade dulwich to 1.2.9 or later, commit the lockfile and redeploy.
If a vulnerable version was live, check your logs and rotate the secrets that server could read.

The advisory

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.

Check your whole app

Dependencies are only half of it. Free and read-only: before you push, run npx shippable-dev scan localhost:3000 in your project folder, no account needed. For your live app, you prove it's yours with a one-line tag first.

References

Merged from OSV, CVE List. Last updated 27 Oct 2026. All vulnerabilities · RSS · JSON

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