Vulnerability in A2aproject A2a-Java
CVE-2026-117507
A security vulnerability has been detected in a2aproject a2a-java up to 1.2.0.Final. This impacts the function TaskManager.saveTaskEvent. The manipulation leads to race condition. The attack may be initiated remotely. Upgrading to version 1.3.0.Final will fix this issue. The identifier of the patch is 6b8e1e085c35e970ef0048901cd25850e4791ec2. The affected component should be upgraded.
Vulnerability class: Race Condition
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.
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/427074 (technical-description, vdb-entry)
- vuldb.com/vuln/427074/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-117507 (third-party-advisory)
- vuldb.com/submit/1015060 (third-party-advisory)
- github.com/a2aproject/a2a-java/pull/1045 (issue-tracking, patch)
- github.com/a2aproject/a2a-java/commit/6b8e1e085c35e970ef0048901cd25850e4791ec2 (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-2026-117507?
- CVE-2026-117507 is a medium-severity vulnerability in A2aproject A2a-Java, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 5.4/10. Published 2026-10-27.
- How severe is CVE-2026-117507?
- Medium severity. CVSS v3 base score is 5.4 out of 10.