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  4. CVE 2026 114094 dulwich before 129 arbitrary file write via dos
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Back to active CVEs
High · CVSS 8.7CVE-2026-114094

Dulwich before 1.2.9 Arbitrary File Write via DOS drive letter pathsCVE-2026-114094

Answer in brief

CVE-2026-114094 records a High severity (CVSS 8.7) vulnerability in Dulwich before 1.2.9 Arbitrary File Write via DOS drive letter paths. The current sources do not mark it as known exploited. The current feed maps jelmer/dulwich (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 21, 2026Updated Oct 21, 2026Source checked Oct 21, 2026First seen by HOL Oct 21, 2026Material review Oct 21, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.7
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 8.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps jelmer/dulwich (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
jelmer/dulwichgeneric>=0 <1.2.91.2.9

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for jelmer/dulwich.
  2. 2Review the reported fix. Update jelmer/dulwich to 1.2.9 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 21, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 21, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 21, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Dulwich before 1.2.9 Infinite Loop DoS via Pack.resolve_objectSame jelmer/dulwich package
  • Dulwich 0.24.0 before 1.2.8 Symlink Write-Through via porcelain.checkout pathsSame jelmer/dulwich package
  • Dulwich 0.23.1 before 1.2.8 Symlink Path Traversal via filter_branch Index FilterSame jelmer/dulwich package
  • Dulwich 0.22.5 before 1.2.8 Path Traversal via Stash Pop SymlinksSame jelmer/dulwich package
  • Tenstorrent tt-metal load_checkpoints.py load_hf_state_dict_filtered path traversalAlso CWE-22
  • Trigger.dev before 4.5.0-rc.3 Path Traversal via Packets Presigned URL EndpointsAlso CWE-22

Record context

Vulnerability class
Path Traversal
EPSS
Not reported
CWE IDs
CWE-22
Source
CVE List V5
Source checked
Oct 21, 2026
References
2 linked sources
Open source record