Arbitrary JSON file write via workflow ID traversal
Published Jun 17, 2025 · Updated Jun 17, 2025
Path traversal in Python A2A 0.5.0 through 0.5.5 allows remote attackers to write JSON files outside workflow storage. The create_workflow endpoint accepts a request-controlled workflow ID, and FileWorkflowStorage joins that ID into a .json path without validation before opening it for writing. Exposure requires the Agent Flow HTTP service to be reachable; successful requests create or overwrite JSON files writable by the service account.
Summary
What happened
Path traversal in Python A2A 0.5.0 through 0.5.5 allows remote attackers to write JSON files outside workflow storage. The create_workflow endpoint accepts a request-controlled workflow ID, and FileWorkflowStorage joins that ID into a .json path without validation before opening it for writing. Exposure requires the Agent Flow HTTP service to be reachable; successful requests create or overwrite JSON files writable by the service account.
The record
- CVE
- CVE-2025-6167
- Published
- Jun 17, 2025
- Updated
- Jun 17, 2025
- Vendor
- Manoj Desai
- Product
- Python A2A
- Classifications
- CWE-22, T1565.001
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 17, 2025CVE publishedPublication date reported by the CVE source.
- Jun 17, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0.5.0
- Affected versionversion=0.5.1
- Affected versionversion=0.5.2
- Affected versionversion=0.5.3
- Affected versionversion=0.5.4
- Affected versionversion=0.5.5
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Workflow ID path-traversal proof of conceptproof of concept · demonstrated
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Technologies
Your stack
See the directory against your own environment.
Your stack
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