Information disclosure in A2aproject A2a-Go
CVE-2026-116478
A vulnerability was detected in a2aproject a2a-go up to 2.4.0. This affects the function CreateExecutor of the file a2asrv/agentexec.go of the component Push Notification Handler. The manipulation results in information exposure through error message. It is possible to launch the attack remotely. Upgrading to version 2.5.0 mitigates this issue. The patch is identified as f4d588216b0c9520e94d571bab725c38ce23064c. It is recommended to upgrade the affected component.
Vulnerability class: Information Disclosure
Published .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- A2aproject A2a-Go — versions 2.0, 2.1, 2.2
Weakness classification (CWE)
References
- vuldb.com/vuln/426391 (technical-description, vdb-entry)
- vuldb.com/vuln/426391/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-116478 (third-party-advisory)
- vuldb.com/submit/1014887 (third-party-advisory)
- github.com/a2aproject/a2a-go/pull/393 (issue-tracking, patch)
- github.com/a2aproject/a2a-go/commit/f4d588216b0c9520e94d571bab725c38ce23064c (patch)
- github.com/a2aproject/a2a-go/releases/tag/v2.5.0 (patch)
- github.com/a2aproject/a2a-go/ (product)
Frequently asked questions
- What is CVE-2026-116478?
- CVE-2026-116478 is a medium-severity vulnerability in A2aproject A2a-Go, classified under Information Disclosure. CVSS score: 5.3/10. Published 2026-10-26.
- How severe is CVE-2026-116478?
- Medium severity. CVSS v3 base score is 5.3 out of 10.