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CVE-2026-114096

7.8, high

Jelmer dulwich Link Following Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
7.8, high high CVSS v3.1
EPSS, next 30 days
n/a
Exploitation
No public evidence
Published
21 Oct 2026today

Description

Dulwich from 0.24.0 before 1.2.8 contains a symlink following vulnerability in porcelain.checkout(paths=[...]) that allows attackers to write arbitrary files by abusing raw os.open without O_NOFOLLOW. Attackers can craft a repository where a worktree symlink points to .git/hooks/post-checkout, so restoring the file from a tag writes a malicious hook for code execution.

Details

Vendor
Jelmer
Product
dulwich
Weakness
CWE-59 (opens in a new tab)
Status
Deferred
Updated
21 Oct 2026
Assigner
disclosure@vulncheck.com

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References 2

Advisories 1

Other references 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Jelmer CVEs

Every Jelmer CVE we hold

Same vendor in what we hold, not a known link between the flaws.

Beyond this page

Is CVE-2026-114096 in your network?

This page tells you how dangerous CVE-2026-114096 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 21 Oct 2026, not the live upstream state.