{"id":"CVE-2026-104817","revision":"d1f8c6b54a8b462dabbe942753f2fd18","records":[{"revision":"d1f8c6b54a8b462dabbe942753f2fd18","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-104817","aliases":[],"title":"Misskey: Lack of rate limiting and size restrictions in RSS fetching API","description":"Misskey is an open source, federated social media platform. From 12.112.1 until 2026.7.0, the unauthenticated fetch-rss API lacks rate limiting and response-size restrictions and performs synchronous XML parsing. An attacker can trigger unbounded outbound HTTP requests and synchronous parsing, exhausting instance resources, amplifying requests toward third-party servers, or probing network-reachable services even when federation is disabled. This issue is fixed in version 2026.7.0.","state":0,"publishedAt":"2026-10-13T18:39:30.169+00:00","modifiedAt":"2026-10-13T19:04:03.012+00:00","affected":[{"ecosystem":"Vendor product","name":"misskey","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"misskey-dev\",\n                    \"product\": \"misskey\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 12.0.0, <= 13.14.2\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 2023.9.0-beta.1, < 2026.7.0\",\n                            \"status\": \"affected\"\n                        }\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:H/SC:L/SI:N/SA:L","score":8.7,"severity":"HIGH"}],"references":["https://github.com/misskey-dev/misskey/security/advisories/GHSA-4x7v-qx8f-g3p8","https://github.com/misskey-dev/misskey/commit/a12ee2e5d72c40252e11a164b2231667c9697667","https://github.com/misskey-dev/misskey/releases/tag/2026.7.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-104817","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-104817","identifiers":["CVE-2026-104817"]},"retained":false,"historicalAffected":[]}],"coverage":[]}