Vulnerability · Published Oct 20, 2026 · Assigned by VulDB

CVE-2026-113707a2aproject a2a-rs inmemory.rs update race condition

Medium 5.4

In plain English

A medium-severity race condition in a2a-rs from a2aproject. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 18% of all known vulnerabilities).

Severity (CVSS 3.1)5.4Medium

Exploit odds (30 days)0.3%top 82.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
a2aproject	a2a-rs	0.4.00.4.10.4.20.4.30.4.4

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

References

VDB-422869 | a2aproject a2a-rs inmemory.rs update race condition vdb-entry, technical-description
VDB-422869 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
CVE-2026-113707 | CVE Analysis and Report third-party-advisory
Submit #1015056 | a2aproject a2a-rs a2a-server-lf ≤ 0.4.4 CWE-362 third-party-advisory
https://github.com/a2aproject/a2a-rs/pull/126 issue-tracking, patch
https://github.com/a2aproject/a2a-rs/commit/7050c7d329238539424ee46440e23b91c4825bee patch
https://github.com/a2aproject/a2a-rs/ product