{"id":"CVE-2026-117503","revision":"b1a10419969c4b5dbfdb5a435ebdf47d","records":[{"revision":"b1a10419969c4b5dbfdb5a435ebdf47d","observedAt":"2026-10-27T15:09:21.953+00:00","statement":{"source":"cve-program","id":"CVE-2026-117503","aliases":[],"title":"a2aproject a2a-go REST SSE handler rest.go resource consumption","description":"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.","state":0,"publishedAt":"2026-10-27T13:45:17.953+00:00","modifiedAt":"2026-10-27T13:45:17.953+00:00","affected":[{"ecosystem":"Vendor product","name":"a2a-go","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"a2aproject\",\n                    \"product\": \"a2a-go\",\n                    \"versions\": [\n                        {\n                            \"version\": \"2.0\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"2.1\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"2.2\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"2.3\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"2.4.0\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"2.5.0\",\n                            \"status\": \"unaffected\"\n                        }\n                    ],\n                    \"cpes\": [\n                        \"cpe:2.3:a:a2aproject:a2a-go:*:*:*:*:*:*:*:*\"\n                    ],\n                    \"modules\": [\n                        \"REST SSE handler\"\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS: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","score":6.9,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"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","score":5.3,"severity":"MEDIUM"},{"system":"CVSS 3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C","score":5.3,"severity":"MEDIUM"},{"system":"CVSS 2.0","vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P/E:ND/RL:OF/RC:C","score":5,"severity":null}],"references":["https://vuldb.com/vuln/427070","https://vuldb.com/vuln/427070/cti","https://vuldb.com/cve/CVE-2026-117503","https://vuldb.com/submit/1015052","https://github.com/a2aproject/a2a-go/pull/396","https://github.com/a2aproject/a2a-go/commit/ff6035bd21e44bb3ee1bfa547885b8c08327fa01","https://github.com/a2aproject/a2a-go/releases/tag/v2.5.0","https://github.com/a2aproject/a2a-go/"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-117503","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-117503","identifiers":["CVE-2026-117503"]},"retained":false,"historicalAffected":[]}],"coverage":[]}