CVE-2026-107858 (GCVE-0-2026-107858)
Vulnerability from cvelistv5 – Published: 2026-10-23 05:08 – Updated: 2026-10-23 05:08
VLAI
EPSS
VEX
Title
Cross-Site WebSocket Hijacking and Permissive CORS in Google Agent Development Kit (ADK) for Java Development Server
Summary
Missing Origin Validation in WebSockets (CWE-1385) and Permissive Cross-domain Policy with Untrusted Domains (CWE-942) in the development web server (ADK Web) in Google Agent Development Kit (ADK) for Java (com.google.adk:google-adk-dev versions 0.1.0 before 1.13.0 and com.google.adk:google-adk-maven-plugin versions 0.3.0 before 1.13.0) allow a remote attacker to control a locally running agent and read its data via a malicious web page visited by a developer while the server is running. The /run_live WebSocket endpoint accepts connections from any origin by default (hardcoded via setAllowedOrigins("*") in versions 0.1.0 through 1.5.0, and defaulting to * via adk.web.cors.origins in versions 1.6.0 through 1.12.0), and since version 0.4.0 the REST API returns Access-Control-Allow-Origin: * by default. Because the server has no authentication and requests originate from the developer's browser (so binding to localhost does not prevent exploitation), a cross-origin page can send messages to the agent (triggering registered tools), stream agent responses, and list, read, create, or delete sessions and artifacts. In versions 1.6.0 through 1.12.0, users can mitigate the issue by setting the adk.web.cors.origins property to an explicit allowlist of trusted origins (such as http://localhost:8000). The vulnerability is fixed in version 1.13.0, which enforces a same-origin default for CORS and the /run_live WebSocket endpoint, and rejects DNS-rebinding requests over loopback.
Severity
CWE
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://github.com/google/adk-java/issues/1257 | issue-trackingexploit |
| https://github.com/google/adk-java/releases/tag/v1.13.0 | release-notes |
| https://github.com/google/adk-java/commit/5667d38… | patch |
| https://github.com/google/adk-java/commit/1ae5078… | patch |
| https://github.com/google/adk-java/pull/1222 | mitigationpatch |
| https://github.com/google/adk-java/commit/c2b087c… | mitigationpatch |
| https://github.com/google/adk-java/releases/tag/v1.6.0 | release-notes |
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Agent Development Kit (ADK) for Java |
Affected:
0.1.0 , < 1.13.0
(semver)
|
guessed | ||
| Agent Development Kit (ADK) for Java |
Affected:
0.3.0 , < 1.13.0
(semver)
|
guessed |
Date Public
2026-06-11 10:31
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
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