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CVE-2026-90820

a2a-java · Vulnerability

CVSS 4.0 5.3 MEDIUMCVSS 3.1 4.3 MEDIUMCVSS 3.0 4.3 MEDIUMCVSS 2.0 4.0 Check source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-90820

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-90820

Published

a2a-java

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "a2aproject",
                    "product": "a2a-java",
                    "versions": [
                        {
                            "version": "1.2.0",
                            "status": "affected"
                        },
                        {
                            "version": "1.3.0",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:2.3:a:a2aproject:a2a-java:*:*:*:*:*:*:*:*"
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON