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TI-2026-80567 Aliases CVE-2026-116478GHSA-6j8p-4q4m-9rmr

Error message leaks sensitive information in a2a-go CreateExecutor

Priority LOW 37CWE-200Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-200.

Summary

The a2a-go project from 2.0 before 2.5.0 has an information exposure flaw in the CreateExecutor function of the push notification handler. The function generates an error message that contains sensitive information (CWE-209). A remote attacker without privileges or user interaction can read limited confidential information from these error messages.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00432 37th percentileScored 2026-11-07
Fix Fixed a2a-go (a2aproject): 2.5.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
a2aprojecta2a-go2.0; 2.1; 2.2; 2.3; 2.4.02.5.0Patch availableCNA
  • a2a-go Vendora2aproject Affected 2.0; 2.1; 2.2; 2.3; 2.4.0 Fixed in 2.5.0 Patch available CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:a2aproject:a2a-go:*:*:*:*:*:*:*:*——a2aproject
  • cpe:2.3:a:a2aproject:a2a-go:*:*:*:*:*:*:*:* Versions — — ·a2aproject

Remediation

Upgrade a2a-go to version 2.5.0, which contains the fix (patch f4d588216b0c9520e94d571bab725c38ce23064c).

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

  • Fix · CNA a2a-go (a2aproject) Fixed in 2.5.0

Timeline

  1. 2026-10-26 Threatist record created from CVE-2026-116478
  2. 2026-10-27 Alias added: GHSA-6j8p-4q4m-9rmr
  3. 2026-10-27 Priority changed: MEDIUM → LOW
  4. 2026-11-02 CISA SSVC decision points changed

References

Patch 3

Other 1

  • TI-2026-76905 Android A2A Java SDK forwards API keys across redirects CVSS 3.1HIGH 7.5
  • TI-2026-76904 A2A Java SDK default task store skips authorization on task reads CVSS 3.1HIGH 7.5
  • TI-2026-76847 Server-side request forgery in A2A Java SDK push notifications CVSS 3.1MEDIUM 5.8
  • TI-2026-81183 Resource consumption in a2aproject a2a-go REST SSE handler CVSS 4.0MEDIUM 6.9
  • TI-2026-61722 HTTP response splitting in a2aproject a2a-java CVSS 4.0MEDIUM 6.9
  • TI-2026-81185 Denial of service in a2aproject a2a-go Distributed Manager Cancel CVSS 4.0MEDIUM 6.9
See all 21 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences