TI-2026-81571 Aliases CVE-2026-118128 GHSA-52g9-jqfx-3hp5

Race condition in a2a-js task status update handling

LOW 36CWE-362Published 2026-10-27 · Updated 2026-10-28

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: —
Confidentiality · integrity · availability: None · Low · Low
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

The a2aproject a2a-js package from 1.0 before 1.2.0 contains a race condition (CWE-362) in ResultManager.applyStatusUpdate in the task status update handler. A remote attacker without privileges or user interaction can affect the integrity and availability of task processing.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00358 29th percentileScored 2026-11-07

Fix Fixed a2a-js (a2aproject): 1.2.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
a2aproject	a2a-js	1.0; 1.1.0	1.2.0	Patch available	CNA

a2a-js Vendora2aproject Affected 1.0; 1.1.0 Fixed in 1.2.0 Patch available CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:a2aproject:a2a-js::::::::	—	—	a2aproject

cpe:2.3:a:a2aproject:a2a-js:*:*:*:*:*:*:*:* Versions — — ·a2aproject

Remediation

Upgrade a2aproject a2a-js to version 1.2.0 or later, which fixes the issue.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Fix · CNA a2a-js (a2aproject) Fixed in 1.2.0

Timeline

2026-10-27 Threatist record created from CVE-2026-118128
2026-10-28 Alias added: GHSA-52g9-jqfx-3hp5
2026-10-28 CISA SSVC decision points changed
2026-10-28 Priority changed: MEDIUM → LOW

References

Patch 3

Other 1

https://github.com/a2aproject/a2a-js/

TI-2026-76905 Android A2A Java SDK forwards API keys across redirects CVSS 3.1HIGH 7.5
TI-2026-76904 A2A Java SDK default task store skips authorization on task reads CVSS 3.1HIGH 7.5
TI-2026-76847 Server-side request forgery in A2A Java SDK push notifications CVSS 3.1MEDIUM 5.8
TI-2026-81183 Resource consumption in a2aproject a2a-go REST SSE handler CVSS 4.0MEDIUM 6.9
TI-2026-61722 HTTP response splitting in a2aproject a2a-java CVSS 4.0MEDIUM 6.9
TI-2026-81185 Denial of service in a2aproject a2a-go Distributed Manager Cancel CVSS 4.0MEDIUM 6.9

See all 21 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences