Is there a public exploit for CVE-2026-117503?

No public exploit for CVE-2026-117503 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-117503?

CVE-2026-117503 scores CVSS 6.9 (v4.0), rated medium. EPSS puts the chance of exploitation in the next 30 days at 0.71%.

What does CVE-2026-117503 affect?

CVE-2026-117503 affects a2aproject a2a-go.

6.9 Medium

A vulnerability was determined in a2aproject a2a-go up to 2.4.0.

CVE-2026-117503

A vulnerability was determined in a2aproject a2a-go up to 2.4.0. Impacted is an unknown function of the file a2asrv/rest.go of the component REST SSE handler. This manipulation causes resource consumption. It is possible to initiate the attack remotely. Upgrading to version 2.5.0 is recommended to address this issue. Patch name: ff6035bd21e44bb3ee1bfa547885b8c08327fa01. It is recommended to upgrade the affected component.

Assessment

CVSS: 6.9 (v4.0)
Severity: Medium
EPSS: 0.71% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 27 October 2026
Last updated: 2 November 2026
Affected: a2aproject · a2a-go
Weakness: CWE-400, CWE-404
Assigner: cna@vuldb.com

CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X

At the source

References

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