What’s Vulnerable › Vulnerabilities

CVE-2026-116479: a2aproject a2a-java JSON-RPC Error getMessage information exposure

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-26 · updated 2026-10-27
• Weakness: CWE-200

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.

Affected products

• a2aproject a2a-java: 1.2.0.Final

References

• https://github.com/a2aproject/a2a-java/
• https://github.com/a2aproject/a2a-java/commit/bbee3369f3825d0fba2373d821f6dc6d4fc82ec0
• https://github.com/a2aproject/a2a-java/pull/1046
• https://github.com/a2aproject/a2a-java/releases/tag/v1.3.0.Final
• https://vuldb.com/cve/CVE-2026-116479
• https://vuldb.com/submit/1014889
• https://vuldb.com/vuln/426392
• https://vuldb.com/vuln/426392/cti

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