zhayujie CowAgent Skill Installation service.py _add_package path traversal (CVE-2026-15331) | HOL Guard CVE

Medium · CVSS 5.4CVE-2026-15331

zhayujie CowAgent Skill Installation service.py _add_package path traversal

Answer in brief

CVE-2026-15331 records a Medium severity (CVSS 5.4) vulnerability in zhayujie CowAgent Skill Installation service.py _add_package path traversal. The current sources do not mark it as known exploited. The current feed maps zhayujie/CowAgent (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 Jul 10, 2026Updated Jul 10, 2026Source checked Sep 19, 2026First seen by HOL Jul 10, 2026Material review Jul 10, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 5.4
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 5.4. 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 zhayujie/CowAgent (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
zhayujie/CowAgentgeneric	2.0 \|\| 2.1.0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for zhayujie/CowAgent.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Jul 10, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Jul 10, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Jul 10, 2026

Sources and claim methodology

Upstream source description

A vulnerability was identified in zhayujie CowAgent up to 2.1.0. The affected element is the function _add_url/_add_package of the file agent/skills/service.py of the component Skill Installation Handler. The manipulation of the argument Name leads to path traversal. The attack may be initiated remotely. Upgrading to version 2.1.2 is sufficient to fix this issue. The identifier of the patch is e85290cddcbb5ffc9c235927f4c92e5b4c3ec264. It is advisable to upgrade the affected component.

Quoted source text, attributed separately from HOL analysis.