Vulnerability in A2aproject A2a-Js
CVE-2026-118128
A vulnerability has been found in a2aproject a2a-js up to 1.1.0. Impacted is the function ResultManager.applyStatusUpdate of the file src/server/result_manager.ts of the component Task Status Update Handler. Such manipulation leads to race condition. The attack may be launched remotely. Upgrading to version 1.2.0 is recommended to address this issue. The name of the patch is 7b87c9480bfa643f9d2b2eaf06988b3d3a95de25. It is recommended to upgrade the affected component.
Vulnerability class: Race Condition
Published .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/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-Js — versions 1.0, 1.1.0
Weakness classification (CWE)
References
- vuldb.com/vuln/427455 (technical-description, vdb-entry)
- vuldb.com/vuln/427455/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-118128 (third-party-advisory)
- vuldb.com/submit/1015057 (third-party-advisory)
- github.com/a2aproject/a2a-js/pull/636 (issue-tracking, patch)
- github.com/a2aproject/a2a-js/commit/7b87c9480bfa643f9d2b2eaf06988b3d3a95de25 (patch)
- github.com/a2aproject/a2a-js/releases/tag/v1.2.0 (patch)
- github.com/a2aproject/a2a-js/ (product)
Frequently asked questions
- What is CVE-2026-118128?
- CVE-2026-118128 is a medium-severity vulnerability in A2aproject A2a-Js, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 6.5/10. Published 2026-10-27.
- How severe is CVE-2026-118128?
- Medium severity. CVSS v3 base score is 6.5 out of 10.