Vulnerability · Published Oct 27, 2026 · Assigned by VulDB

CVE-2026-117505a2aproject a2a-java ChildQueue queue.offer resource consumption

Medium 4.3

In plain English

A medium-severity uncontrolled resource consumption in a2a-java 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 24% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.3%top 76.0% 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-java up to 1.2.0.Final. The impacted element is the function queue.offer of the component ChildQueue. Performing a manipulation results in resource consumption. The attack can be initiated remotely. Upgrading to version 1.3.0.Final is sufficient to resolve this issue. The patch is named be663f806efcfdddd2805d214fae4998379ac5f2. It is advisable to upgrade the affected component.

Affected products (as reported)

Vendor	Product	Versions
a2aproject	a2a-java	1.2.0.Final

Weakness: CWE-400, CWE-404 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C

References

VDB-427072 | a2aproject a2a-java ChildQueue queue.offer resource consumption vdb-entry, technical-description
VDB-427072 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
CVE-2026-117505 | CVE Analysis and Report third-party-advisory
Submit #1015054 | a2aproject a2a-java ≤ 1.2.0.Final CWE-400 third-party-advisory
https://github.com/a2aproject/a2a-java/pull/1040 issue-tracking, patch
https://github.com/a2aproject/a2a-java/commit/be663f806efcfdddd2805d214fae4998379ac5f2 patch
https://github.com/a2aproject/a2a-java/releases/tag/v1.3.0.Final patch
https://github.com/a2aproject/a2a-java/ product