CVE-2026-117505

a2aproject a2a-java ChildQueue queue.offer resource consumption

State: Published
Severity: 5.3 Medium
Published: Oct 27, 2026
Updated: Oct 28, 2026
Reserved: Oct 27, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X	VulDB
3.1	4.3 Medium	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	VulDB
3.0	4.3 Medium	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C	VulDB
2.0	4.0 Medium	AV:N/AC:L/Au:S/C:N/I:N/A:P/E:ND/RL:OF/RC:C	VulDB

Weaknesses

CWE-400 Resource Consumption
CWE-404 Denial of Service

Affected Products

Product	Versions
a2a-javaa2aproject	1.2.0.FinalAffected 1.3.0.FinalNot affected

References

VDB-427072 | a2aproject a2a-java ChildQueue queue.offer resource consumptionvdb-entrytechnical-description
VDB-427072 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions-required
CVE-2026-117505 | CVE Analysis and Reportthird-party-advisory
Submit #1015054 | a2aproject a2a-java ≤ 1.2.0.Final CWE-400third-party-advisory
https://github.com/a2aproject/a2a-java/pull/1040issue-trackingpatch
https://github.com/a2aproject/a2a-java/commit/be663f806efcfdddd2805d214fae4998379ac5f2patch
https://github.com/a2aproject/a2a-java/releases/tag/v1.3.0.Finalpatch
https://github.com/a2aproject/a2a-java/product

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