Information disclosure in A2aproject A2a-Java
CVE-2026-116479
A flaw has been found in a2aproject a2a-java up to 1.2.0.Final. This impacts the function getMessage of the component JSON-RPC Error Handler. This manipulation causes information exposure through error message. The attack can be initiated remotely. Upgrading to version 1.3.0.Final will fix this issue. Patch name: bbee3369f3825d0fba2373d821f6dc6d4fc82ec0. Upgrading the affected component is advised.
Vulnerability class: Information Disclosure
Published .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- A2aproject A2a-Java — versions 1.2.0.Final
Weakness classification (CWE)
References
- vuldb.com/vuln/426392 (technical-description, vdb-entry)
- vuldb.com/vuln/426392/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-116479 (third-party-advisory)
- vuldb.com/submit/1014889 (third-party-advisory)
- github.com/a2aproject/a2a-java/pull/1046 (issue-tracking, patch)
- github.com/a2aproject/a2a-java/commit/bbee3369f3825d0fba2373d821f6dc6d4fc82ec0 (patch)
- github.com/a2aproject/a2a-java/releases/tag/v1.3.0.Final (patch)
- github.com/a2aproject/a2a-java/ (product)
Frequently asked questions
- What is CVE-2026-116479?
- CVE-2026-116479 is a medium-severity vulnerability in A2aproject A2a-Java, classified under Information Disclosure. CVSS score: 4.3/10. Published 2026-10-26.
- How severe is CVE-2026-116479?
- Medium severity. CVSS v3 base score is 4.3 out of 10.