Google ADK up to 0.5.x FileArtifactService saveArtifact userId/sessionId path traversal

Summaryinfo

A vulnerability categorized as critical has been discovered in Google ADK up to 0.5.x. This impacts the function saveArtifact of the component FileArtifactService. Such manipulation of the argument userId/sessionId leads to path traversal. This vulnerability is listed as CVE-2026-105772. The attack may be performed from remote. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Google ADK up to 0.5.x. Affected by this issue is the function saveArtifact of the component FileArtifactService. The manipulation of the argument userId/sessionId with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Path Traversal (CWE-22) in FileArtifactService in Google ADK TypeScript (@google/adk) versions 0.4.0 before 0.6.0 allows a remote unauthenticated attacker to read files matching the artifact directory layout or write files (when an agent tool invokes saveArtifact) outside the intended artifact storage root via crafted relative or percent-encoded path traversal sequences (such as ../ or ..%2F) in the userId or sessionId parameters when the ADK API server is exposed with the non-default FileArtifactService enabled. Applications using the default InMemoryArtifactService are unaffected. Upgrade to @google/adk version 0.6.0 or later.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-105772 since 10/05/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/20/2026). The MITRE ATT&CK project declares the attack technique as T1006.

Upgrading to version 0.6.0 eliminates this vulnerability.

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Productinfo

Vendor

• Google

Name

• ADK

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5

License

• free

Website

• Vendor: https://www.google.com/

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