CVE-2026-117503

MEDIUM 5.3

a2aproject a2a-go REST SSE handler rest.go resource consumption

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-400 CWE-404
Vendor	a2aproject
Product	a2a-go
Published	Oct 27, 2026

Stay Ahead of the Next One

Get instant alerts for a2aproject a2a-go

Be the first to know when new medium vulnerabilities affecting a2aproject a2a-go are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

a2aproject / a2a-go

2.0 2.1 2.2 2.3 2.4.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/427070 vuldb.com: https://vuldb.com/vuln/427070/cti vuldb.com: https://vuldb.com/cve/CVE-2026-117503 vuldb.com: https://vuldb.com/submit/1015052 github.com: https://github.com/a2aproject/a2a-go/pull/396 github.com: https://github.com/a2aproject/a2a-go/commit/ff6035bd21e44bb3ee1bfa547885b8c08327fa01 github.com: https://github.com/a2aproject/a2a-go/releases/tag/v2.5.0 github.com: https://github.com/a2aproject/a2a-go/

Credits

🔍 colorfullbz (VulDB User)