JSON disclosure and file writes via path traversal
Published Aug 27, 2026 · Updated Aug 27, 2026
Path traversal in MAA-AI MaaMCP 1.1.1.dev6+g2e4a41287 allows context-dependent attackers to read JSON files and write files outside pipelines. save_pipeline and load_pipeline pass caller-controlled output_path and pipeline_path values to Path and open without resolving them beneath the pipelines directory. Exploitation requires an enabled MCP client or a prompt-injected agent to invoke the tools, and access is limited to files readable or writable by the server process.
Summary
What happened
Path traversal in MAA-AI MaaMCP 1.1.1.dev6+g2e4a41287 allows context-dependent attackers to read JSON files and write files outside pipelines. save_pipeline and load_pipeline pass caller-controlled output_path and pipeline_path values to Path and open without resolving them beneath the pipelines directory. Exploitation requires an enabled MCP client or a prompt-injected agent to invoke the tools, and access is limited to files readable or writable by the server process.
The record
- CVE
- CVE-2026-81847
- Published
- Aug 27, 2026
- Updated
- Aug 27, 2026
- Vendor
- MAA-AI
- Product
- MaaMCP
- Classifications
- CWE-22, T1565.001, T1005
- Attack vector
- Unavailable
- Privileges
- Unavailable
Timeline
How it unfolded
- Aug 27, 2026CVE publishedPublication date reported by the CVE source.
- Aug 27, 2026Record 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=1.1.1.dev6+g2e4a41287
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
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
- MaaMCP save_pipeline raw JSON-RPC proof of conceptfunctional · demonstrated
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Technologies
Your stack
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Your stack
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