CVE-2026-116478: Information Disclosure (CVSS 5.3)

Description

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.

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CVSS v3.1 Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS — Exploit Prediction

0.0043

Probability of exploitation

0.38%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-200 CWE-200

CWE-209 CWE-209

References

Other References

https://github.com/a2aproject/a2a-go/ https://github.com/a2aproject/a2a-go/commit/f4d588216b0c9520e94d571bab725c38ce23064c https://github.com/a2aproject/a2a-go/pull/393 https://github.com/a2aproject/a2a-go/releases/tag/v2.5.0 https://vuldb.com/cve/CVE-2026-116478 https://vuldb.com/submit/1014887 https://vuldb.com/vuln/426391 https://vuldb.com/vuln/426391/cti

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2026-116478? +

CVE-2026-116478 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0043, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-116478? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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