{"id":"CVE-2026-62857","state":"PUBLISHED","title":"Fedify: Server-Side Request Forgery in getNodeInfo() Allows Access to Internal Network Resources","description":"Fedify is a TypeScript library for building federated server apps powered by ActivityPub. From version 1.2.0 through the affected 1.9, 1.10, 2.0, 2.1, 2.2, and 2.3 maintenance lines, getNodeInfo() follows an attacker-controlled links[].href value from /.well-known/nodeinfo without scheme, redirect, or private-address validation, allowing requests to loopback, link-local, cloud metadata, and private-network services and returning their response bodies. This issue is fixed in versions 1.9.13, 1.10.12, 2.0.22, 2.1.18, 2.2.7, and 2.3.2.","publishedAt":"2026-08-06T21:04:23.341Z","updatedAt":"2026-08-08T02:40:28.655Z","severity":{"score":8.8,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:L/SC:N/SI:N/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["fedify-dev fedify"],"affected":[{"vendor":"fedify-dev","product":"fedify","versions":[{"version":">= 1.2.0, < 1.9.13","status":"affected"},{"version":">= 1.10.0, < 1.10.12","status":"affected"},{"version":">= 2.0.0, < 2.0.22","status":"affected"},{"version":">= 2.1.0, < 2.1.18","status":"affected"},{"version":">= 2.2.0, < 2.2.7","status":"affected"},{"version":">= 2.3.0, < 2.3.2","status":"affected"}]}],"references":["https://github.com/fedify-dev/fedify/security/advisories/GHSA-hqph-j65v-8cq5","https://github.com/fedify-dev/fedify/releases/tag/2.3.2"],"weaknesses":["CWE-918"],"ingestedAt":"2026-10-29T20:12:32.778Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/62xxx/CVE-2026-62857.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-62857","state":"PUBLISHED","datePublished":"2026-08-06T21:04:23.341Z","dateUpdated":"2026-08-08T02:40:28.655Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-07-14T21:10:50.032Z"},"containers":{"cna":{"title":"Fedify: Server-Side Request Forgery in getNodeInfo() Allows Access to Internal Network Resources","descriptions":[{"lang":"en","value":"Fedify is a TypeScript library for building federated server apps powered by ActivityPub. From version 1.2.0 through the affected 1.9, 1.10, 2.0, 2.1, 2.2, and 2.3 maintenance lines, getNodeInfo() follows an attacker-controlled links[].href value from /.well-known/nodeinfo without scheme, redirect, or private-address validation, allowing requests to loopback, link-local, cloud metadata, and private-network services and returning their response bodies. This issue is fixed in versions 1.9.13, 1.10.12, 2.0.22, 2.1.18, 2.2.7, and 2.3.2."}],"affected":[{"vendor":"fedify-dev","product":"fedify","versions":[{"version":">= 1.2.0, < 1.9.13","status":"affected"},{"version":">= 1.10.0, < 1.10.12","status":"affected"},{"version":">= 2.0.0, < 2.0.22","status":"affected"},{"version":">= 2.1.0, < 2.1.18","status":"affected"},{"version":">= 2.2.0, < 2.2.7","status":"affected"},{"version":">= 2.3.0, < 2.3.2","status":"affected"}]}],"references":[{"url":"https://github.com/fedify-dev/fedify/security/advisories/GHSA-hqph-j65v-8cq5","name":"https://github.com/fedify-dev/fedify/security/advisories/GHSA-hqph-j65v-8cq5","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/fedify-dev/fedify/releases/tag/2.3.2","name":"https://github.com/fedify-dev/fedify/releases/tag/2.3.2","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.8,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:L/SC:N/SI:N/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-918","lang":"en","description":"CWE-918: Server-Side Request Forgery (SSRF)","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-08-06T21:04:23.341Z"},"source":{"advisory":"GHSA-hqph-j65v-8cq5","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/fedify-dev/fedify/security/advisories/GHSA-hqph-j65v-8cq5","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-08T02:39:56.206189Z","id":"CVE-2026-62857","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-08T02:40:28.655Z"}}]}}}