A security vulnerability has been detected in a2aproject a2a-java 1.2.0. (CVE-2026-90820)
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.
AI Analysis
Technical Summary
The vulnerability in a2aproject a2a-java 1.2.0 affects the AuthorizationRequestHandlerDecorator.onListTasks function in the server-common component. It results in missing authorization, enabling remote attackers to bypass access controls. The vulnerability is tracked as CWE-862 (Missing Authorization). The vendor fixed the issue in version 1.3.0, with the patch identified by commit e9a1abf9c90c02b16d17293afdc3cc2f555d63a6.
Potential Impact
The vulnerability allows remote attackers to bypass authorization checks, potentially granting unauthorized access to resources or operations that should be restricted. The CVSS 3.1 base score is 4.3 (medium severity), reflecting low confidentiality impact, no integrity or availability impact, and low attack complexity with low privileges required and no user interaction needed.
Mitigation Recommendations
Upgrade the affected component a2aproject a2a-java from version 1.2.0 to version 1.3.0 or later to apply the official fix. This upgrade resolves the missing authorization vulnerability. No additional mitigation steps are indicated.
A security vulnerability has been detected in a2aproject a2a-java 1.2.0. (CVE-2026-90820)
Description
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.
CVSS v3.1
Score 4.3medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in a2aproject a2a-java 1.2.0 affects the AuthorizationRequestHandlerDecorator.onListTasks function in the server-common component. It results in missing authorization, enabling remote attackers to bypass access controls. The vulnerability is tracked as CWE-862 (Missing Authorization). The vendor fixed the issue in version 1.3.0, with the patch identified by commit e9a1abf9c90c02b16d17293afdc3cc2f555d63a6.
Potential Impact
The vulnerability allows remote attackers to bypass authorization checks, potentially granting unauthorized access to resources or operations that should be restricted. The CVSS 3.1 base score is 4.3 (medium severity), reflecting low confidentiality impact, no integrity or availability impact, and low attack complexity with low privileges required and no user interaction needed.
Mitigation Recommendations
Upgrade the affected component a2aproject a2a-java from version 1.2.0 to version 1.3.0 or later to apply the official fix. This upgrade resolves the missing authorization vulnerability. No additional mitigation steps are indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-vmmr-97qx-h8c4
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-90820"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aa8a17d55bf5e2cf5f3c9e3
Added to database: 09/15/2026, 01:38:05 UTC
Last enriched: 09/15/2026, 01:44:16 UTC
Last updated: 09/15/2026, 03:01:23 UTC
Views: 2
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