What’s Vulnerable › Vulnerabilities

CVE-2026-117504: a2aproject a2a-go Distributed Manager distributed_manager.go Cancel denial of service

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-27 · updated 2026-10-27
• Weakness: CWE-404

Description

A vulnerability was identified in a2aproject a2a-go up to 2.4.0. The affected element is the function Cancel of the file internal/taskexec/distributed_manager.go of the component Distributed Manager. Such manipulation leads to denial of service. It is possible to launch the attack remotely. Upgrading to version 2.5.0 is sufficient to fix this issue. The name of the patch is 14e41a978b31e134ffa1170d8657f9dd98529aa3. Upgrading the affected component is advised.

Affected products

• a2aproject a2a-go: 2.0, 2.1, 2.2, 2.3, 2.4.0

References

• https://github.com/a2aproject/a2a-go/
• https://github.com/a2aproject/a2a-go/commit/14e41a978b31e134ffa1170d8657f9dd98529aa3
• https://github.com/a2aproject/a2a-go/pull/409
• https://github.com/a2aproject/a2a-go/releases/tag/v2.5.0
• https://vuldb.com/cve/CVE-2026-117504
• https://vuldb.com/submit/1015053
• https://vuldb.com/vuln/427071
• https://vuldb.com/vuln/427071/cti

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