High severity · published Oct 21, 2026
CVE-2026-114096
Dulwich 0.24.0 before 1.2.8 Symlink Write-Through via porcelain.checkout paths
7.8
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 5% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DU
dulwich · jelmer
0.24.0 before 1.2.8 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-114096
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-114096
github.com
https://github.com/jelmer/dulwich/security/advisories/GHSA-8w8g-wq8h-fq33
www.vulncheck.com
https://www.vulncheck.com/advisories/dulwich-0.24.0-before-1.2.8-symlink-write-through-via-porcelain-checkout-paths
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