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.

CVSS v3 4.3 MEDIUM
CVSS v2.0 4.0 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

4.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:S/C:P/I:N/A:N

Exploitability : 8.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
https://github.com/a2aproject/a2a-java/
https://github.com/a2aproject/a2a-java/commit/e9a1abf9c90c02b16d17293afdc3cc2f555d63a6
https://github.com/a2aproject/a2a-java/pull/1038
https://github.com/a2aproject/a2a-java/releases/tag/v1.3.0.Final
https://vuldb.com/cve/CVE-2026-90820
https://vuldb.com/submit/925152
https://vuldb.com/vuln/403323
https://vuldb.com/vuln/403323/cti

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-14 21:17

Updated : 2026-09-15 14:37

NVD link : CVE-2026-90820

Mitre link : CVE-2026-90820

CVE.ORG link : CVE-2026-90820

JSON object : View

Products Affected

No product.

CWE

CWE-862

Missing Authorization

CWE-863

Incorrect Authorization

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