CVE-2026-116479

a2aproject a2a-java JSON-RPC Error getMessage information exposure

State: Published
Severity: 5.3 Medium
Published: Oct 26, 2026
Updated: Oct 27, 2026
Reserved: Oct 26, 2026

Description

A flaw has been found in a2aproject a2a-java up to 1.2.0.Final. This impacts the function getMessage of the component JSON-RPC Error Handler. This manipulation causes information exposure through error message. The attack can be initiated remotely. Upgrading to version 1.3.0.Final will fix this issue. Patch name: bbee3369f3825d0fba2373d821f6dc6d4fc82ec0. Upgrading the affected component is advised.

Scores

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

Weaknesses

CWE-209 Information Exposure Through Error Message
CWE-200 Information Disclosure

Affected Products

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

References

VDB-426392 | a2aproject a2a-java JSON-RPC Error getMessage information exposurevdb-entrytechnical-description
VDB-426392 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions-required
CVE-2026-116479 | CVE Analysis and Reportthird-party-advisory
Submit #1014889 | a2aproject a2a-java ≤ v1.2.0.Final CWE-209third-party-advisory
https://github.com/a2aproject/a2a-java/pull/1046issue-trackingpatch
https://github.com/a2aproject/a2a-java/commit/bbee3369f3825d0fba2373d821f6dc6d4fc82ec0patch
https://github.com/a2aproject/a2a-java/releases/tag/v1.3.0.Finalpatch
https://github.com/a2aproject/a2a-java/product

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.