CVE-2026-90820a2aproject a2a-java AuthorizationRequestHandlerDecorator.java AuthorizationRequestHandlerDecorator.onListTasks authorization
Updated under an hour ago ()
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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
- 4.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:X/RL:O/RC:C
- Weakness (CWE)
- CWE-862, CWE-863
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulDB
- NVD analysis
- Deferred
- Record last updated
- Sep 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
a2aproject a2a-java a2aproject:a2a-java | 1.2.0; 1.3.0 not affected | CNA record |
References
- https://vuldb.com/vuln/403323vdb-entry, technical-description
- https://vuldb.com/vuln/403323/ctisignature, permissions-required
- https://vuldb.com/cve/CVE-2026-90820third-party-advisory
- https://vuldb.com/submit/925152third-party-advisory
- https://github.com/a2aproject/a2a-java/pull/1038issue-tracking, patch
- https://github.com/a2aproject/a2a-java/commit/e9a1abf9c90c02b16d17293afdc3cc2f555d63a6patch
- https://github.com/a2aproject/a2a-java/releases/tag/v1.3.0.Finalpatch
- https://github.com/a2aproject/a2a-java/product
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.