Is CVE-2026-114094 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-114094 being exploited in the wild.

How severe is CVE-2026-114094?

High severity, with a CVSS score of 8.8, published 21 October 2026.

Is there a fix for CVE-2026-114094?

Yes: fixed in 1.2.9. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-114094 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-114094?

Check whether you run Jelmer Dulwich at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-114094: Dulwich path traversal via DOS drive letter prefixes on Windows

CVE-2026-114094 · Severity: high · CVSS 8.8 · Published 2026-10-21

Dulwich is a Python Git implementation library used to clone and manage repositories. On Windows systems, a malicious Git repository can be crafted to write files outside the intended directory by bypassing path validation, leading to arbitrary file write and remote code execution. This could compromise CI/CD runners, steal SSH keys, or plant malware when a Windows user clones an untrusted repository.

Technologies: Jelmer Dulwich. Vendors: Jelmer.

Quick answers

Is CVE-2026-114094 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-114094 being exploited in the wild.
How severe is CVE-2026-114094?: High severity, with a CVSS score of 8.8, published 21 October 2026.
Which products and versions are affected?: Jelmer Dulwich before 1.2.9.
Is there a fix for CVE-2026-114094?: Yes: fixed in 1.2.9. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-114094 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-114094?: Check whether you run Jelmer Dulwich at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 1.2.9

Technical details

A path traversal vulnerability exists in Dulwich's NTFS path validation functions (validate_path_element_ntfs, _tree_to_fs_path) which fail to block DOS drive letter prefixes like "C:" in Git tree entries. When checkout occurs on Windows, os.path.join() treats a second argument starting with a drive letter as absolute, discarding the repository root path and writing files to arbitrary system locations. The vulnerability requires a user to clone a malicious repository but allows pre-authentication exploitation.

Affected products

Jelmer Dulwich before 1.2.9

Timeline

2026-07-06: disclosed
2026-10-21: advisory

References

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