{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-104817","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-10-02T14:17:09.334Z","datePublished":"2026-10-13T18:39:30.169Z","dateUpdated":"2026-10-13T19:04:03.012Z"},"containers":{"cna":{"title":"Misskey: Lack of rate limiting and size restrictions in RSS fetching API","problemTypes":[{"descriptions":[{"cweId":"CWE-405","lang":"en","description":"CWE-405: Asymmetric Resource Consumption (Amplification)","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-770","lang":"en","description":"CWE-770: Allocation of Resources Without Limits or Throttling","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-918","lang":"en","description":"CWE-918: Server-Side Request Forgery (SSRF)","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"LOW","subIntegrityImpact":"NONE","subAvailabilityImpact":"LOW","baseScore":8.7,"baseSeverity":"HIGH","vectorString":"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","version":"4.0"}}],"references":[{"name":"https://github.com/misskey-dev/misskey/security/advisories/GHSA-4x7v-qx8f-g3p8","tags":["x_refsource_CONFIRM"],"url":"https://github.com/misskey-dev/misskey/security/advisories/GHSA-4x7v-qx8f-g3p8"},{"name":"https://github.com/misskey-dev/misskey/commit/a12ee2e5d72c40252e11a164b2231667c9697667","tags":["x_refsource_MISC"],"url":"https://github.com/misskey-dev/misskey/commit/a12ee2e5d72c40252e11a164b2231667c9697667"},{"name":"https://github.com/misskey-dev/misskey/releases/tag/2026.7.0","tags":["x_refsource_MISC"],"url":"https://github.com/misskey-dev/misskey/releases/tag/2026.7.0"}],"affected":[{"vendor":"misskey-dev","product":"misskey","versions":[{"version":">= 12.0.0, <= 13.14.2","status":"affected"},{"version":">= 2023.9.0-beta.1, < 2026.7.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-10-13T18:39:30.169Z"},"descriptions":[{"lang":"en","value":"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."}],"source":{"advisory":"GHSA-4x7v-qx8f-g3p8","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-13T19:03:52.462592Z","id":"CVE-2026-104817","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-10-13T19:04:03.012Z"}}]}}