High severity · published Oct 21, 2026
CVE-2026-114094
Dulwich before 1.2.9 Arbitrary File Write via DOS drive letter paths
8.8
CVSS
0.7%
EPSS
No
On KEV
Description
Dulwich before 1.2.9 fails to validate DOS drive letter prefixes in Git tree path elements on Windows, allowing arbitrary file write. Attackers can craft a malicious repository with a tree entry named 'C:' that bypasses NTFS validation and writes files outside the worktree to achieve remote code execution.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 52% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DU
dulwich · jelmer
before 1.2.9 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-114094
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-114094
github.com
https://github.com/jelmer/dulwich/security/advisories/GHSA-8mcx-5rqc-vhmf
www.vulncheck.com
https://www.vulncheck.com/advisories/dulwich-before-1.2.9-arbitrary-file-write-via-dos-drive-letter-paths
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