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CVE-2026-116479

a2aproject a2a-java JSON-RPC Error getMessage information exposure

MEDIUM
4.3
CVSS Score
Published: October 26, 2026 at 07:45 PM UTC
Updated: October 27, 2026 at 03:16 PM UTC
1 product affected across 1 vendorA2A Java

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

A2A Java· A2APROJECT
90%
1.2.0.Final
Vendor states this is fixed in 1.3.0.Final (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (8)

VDB EntryTechnical Description
Source: cverecord
https://vuldb.com/vuln/426392
SignaturePermissions Required
Source: cverecord
https://vuldb.com/vuln/426392/cti
Third Party Advisory
Source: cverecord
https://vuldb.com/cve/CVE-2026-116479
Third Party Advisory
Source: cverecord
https://vuldb.com/submit/1014889
Issue TrackingPatch
Source: cverecord
https://github.com/a2aproject/a2a-java/pull/1046
Patch
Source: cverecord
https://github.com/a2aproject/a2a-java/commit/bbee3369f3825d0fba2373d821f6dc6d4fc82ec0
Patch
Source: cverecord
https://github.com/a2aproject/a2a-java/releases/tag/v1.3.0.Final
Product
Source: cverecord
https://github.com/a2aproject/a2a-java/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.3MEDIUMVulDB
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-209CWE-200

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