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  4. CVE 2026 116479 a2aproject a2a java json rpc error getmessage
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Back to active CVEs
Medium · CVSS 5.3CVE-2026-116479

a2aproject a2a-java JSON-RPC Error getMessage information exposureCVE-2026-116479

Answer in brief

CVE-2026-116479 records a Medium severity (CVSS 5.3) vulnerability in a2aproject a2a-java JSON-RPC Error getMessage information exposure. The current sources do not mark it as known exploited. The current feed maps a2aproject/a2a-java (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 26, 2026Updated Oct 26, 2026Source checked Oct 26, 2026First seen by HOL Oct 26, 2026Material review Oct 26, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 5.3
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 5.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps a2aproject/a2a-java (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
a2aproject/a2a-javageneric1.2.0.FinalNot reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for a2aproject/a2a-java.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Oct 26, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 26, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 26, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • Source referencevuldb.com
  • Source referencevuldb.com
  • Source referencevuldb.com
  • Source referencevuldb.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • a2aproject a2a-dotnet Parser A2AJsonRpcProcessor.cs A2AJsonRpcProcessor.ProcessRequestAsync information exposureAlso CWE-209
  • a2aproject a2a-go Push Notification agentexec.go CreateExecutor information exposureAlso CWE-209
  • Mem0: Cross-tenant conversation leak via unescaped delimiter collision in session-scope key (_build_session_scope)Also CWE-200

Record context

Vulnerability class
Arbitrary File Read
EPSS
Not reported
CWE IDs
CWE-209, CWE-200
Source
CVE List V5
Source checked
Oct 26, 2026
References
8 linked sources
Open source record