Vulnerability · Published Oct 27, 2026 · Assigned by VulDB

CVE-2026-118128a2aproject a2a-js Task Status Update result_manager.ts ResultManager.applyStatusUpdate race condition

Medium 6.5

In plain English

A medium-severity race condition in a2a-js from a2aproject. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.4%top 70.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
a2aproject	a2a-js	1.01.1.0

Weakness: CWE-362 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L/E:X/RL:O/RC:C

References

VDB-427455 | a2aproject a2a-js Task Status Update result_manager.ts ResultManager.applyStatusUpdate race condition vdb-entry, technical-description
VDB-427455 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
CVE-2026-118128 | CVE Analysis and Report third-party-advisory
Submit #1015057 | a2aproject a2a-js ≤ 1.1.0 CWE-362 third-party-advisory
https://github.com/a2aproject/a2a-js/pull/636 issue-tracking, patch
https://github.com/a2aproject/a2a-js/commit/7b87c9480bfa643f9d2b2eaf06988b3d3a95de25 patch
https://github.com/a2aproject/a2a-js/releases/tag/v1.2.0 patch
https://github.com/a2aproject/a2a-js/ product