CVE-2026-90820: a2aproject a2a-java AuthorizationRequestHandlerDecorator.java AuthorizationRequestHandlerDecorator.onListTasks authorization
A security vulnerability has been detected in a2aproject a2a-java 1.2.0. The impacted element is the function AuthorizationRequestHandlerDecorator.onListTasks of the file server-common/src/main/java/org/a2aproject/sdk/server/requesthandlers/AuthorizationRequestHandlerDecorator.java. Such manipulation leads to missing authorization. The attack can be launched remotely. Upgrading to version 1.3.0 is sufficient to resolve this issue. The name of the patch is e9a1abf9c90c02b16d17293afdc3cc2f555d63a6. The affected component should be upgraded.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
a2aproject a2a-javato a version that resolves this vulnerability.Fixed in 1.3.0Patch e9a1abf9c90c02b16d17293afdc3cc2f555d63a6
Event History
Frequently Asked Questions
Which deployments are affected?
a2aproject a2a-java version 1.2.0 is identified as affected, specifically the server-common AuthorizationRequestHandlerDecorator.onListTasks functionality.
What access does an attacker need to exploit this issue?
The vulnerability can be exploited remotely and requires low privileges. No user interaction is required.
What is the recommended remediation?
Upgrade a2aproject a2a-java to version 1.3.0. The referenced fix is patch e9a1abf9c90c02b16d17293afdc3cc2f555d63a6.