CVE-2026-116478 a2aproject CVE debrief

Who should care

Defenders responsible for a2aproject a2a-go deployments should assess exposure and prioritize upgrading to version 2.5.0 or applying the patch f4d588216b0c9520e94d571bab725c38ce23064c to prevent potential information exposure.

Why it matters

Defenders should prioritize upgrading to version 2.5.0 or applying the patch f4d588216b0c9520e94d571bab725c38ce23064c to prevent potential information exposure through error messages in a2aproject a2a-go deployments.

• Potential information exposure through error messages
• Need to upgrade to version 2.5.0 or apply the patch f4d588216b0c9520e94d571bab725c38ce23064c
• Remote attack possibility requires defensive priority

Technical summary

The vulnerability affects the function CreateExecutor of the file a2asrv/agentexec.go of the component Push Notification Handler in a2aproject a2a-go up to 2.4.0, allowing for information exposure through error messages. The vulnerability can be exploited remotely and upgrading to version 2.5.0 or applying the patch f4d588216b0c9520e94d571bab725c38ce23064c is recommended to prevent potential information exposure. Defenders should prioritize upgrading to version 2.5.0 or applying the patch to prevent potential information exposure through error messages.

Defensive priority

Defenders should prioritize upgrading to version 2.5.0 or applying the patch f4d588216b0c9520e94d571bab725c38ce23064c to prevent potential information exposure through error messages.

Recommended defensive actions

• Upgrade to version 2.5.0 or apply the patch f4d588216b0c9520e94d571bab725c38ce23064c
• Review and update affected components
• Monitor for potential information exposure through error messages
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its description, affected versions, and mitigation. However, the corpus does not establish versions, exploitation, impact, or remediation beyond upgrading to version 2.5.0 or applying the patch.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.