TI-2026-78642 Aliases CVE-2026-113707

Race condition in a2a-rs InMemoryTaskStore update function

LOW 24CWE-362Published 2026-10-20 · Updated 2026-10-28

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: —
Confidentiality · integrity · availability: None · Low · Low
Fix status: No fix listed

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

Summary

The a2aproject a2a-rs package up to 0.4.4 contains a race condition (CWE-362) in the InMemoryTaskStore::update function. Shared resources are accessed concurrently without proper synchronization. A remote attacker with low privileges can modify or disrupt task data without user interaction.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

A security flaw has been discovered in a2aproject a2a-rs up to 0.4.4. The affected element is the function InMemoryTaskStore::update of the file a2a-server/src/task_store/inmemory.rs. The manipulation results in race condition. The attack may be performed from remote. The patch is identified as 7050c7d329238539424ee46440e23b91c4825bee. It is advisable to implement a patch to correct this issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00258 17th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
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-rs	0.4.0; 0.4.1; 0.4.2; 0.4.3; 0.4.4	—	No fix listed	CNA

a2a-rs Vendora2aproject Affected 0.4.0; 0.4.1; 0.4.2; 0.4.3; 0.4.4 Fixed in — No fix listed CNA

CPE names CNA · 1

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

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

Remediation

The sources list no fixed version for a2a-rs. A patch is identified as commit 7050c7d329238539424ee46440e23b91c4825bee.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

2026-10-21 Threatist record created from CVE-2026-113707
2026-10-28 CISA SSVC decision points changed

References

Patch 2

Other 1

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

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See all 21 →

Sources

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