{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-42346","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-04-26T13:26:14.515Z","datePublished":"2026-05-08T22:26:50.501Z","dateUpdated":"2026-05-11T14:35:55.041Z"},"containers":{"cna":{"title":"Postiz: TOCTOU DNS rebinding bypasses all SSRF URL validation paths","problemTypes":[{"descriptions":[{"cweId":"CWE-918","lang":"en","description":"CWE-918: Server-Side Request Forgery (SSRF)","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-f7jj-p389-4w45","tags":["x_refsource_CONFIRM"],"url":"https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-f7jj-p389-4w45"},{"name":"https://github.com/gitroomhq/postiz-app/commit/071143dcb01cdeb9d5d7019892f4c6ff7b19dbeb","tags":["x_refsource_MISC"],"url":"https://github.com/gitroomhq/postiz-app/commit/071143dcb01cdeb9d5d7019892f4c6ff7b19dbeb"},{"name":"https://github.com/gitroomhq/postiz-app/releases/tag/v2.21.7","tags":["x_refsource_MISC"],"url":"https://github.com/gitroomhq/postiz-app/releases/tag/v2.21.7"}],"affected":[{"vendor":"gitroomhq","product":"postiz-app","versions":[{"version":">= 2.16.6, < 2.21.7","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-05-08T22:26:50.501Z"},"descriptions":[{"lang":"en","value":"Postiz is an AI social media scheduling tool. From version 2.16.6 to before version 2.21.7, all SSRF protections added in v2.21.4–v2.21.6 share a fundamental TOCTOU (Time-of-Check-Time-of-Use) vulnerability: isSafePublicHttpsUrl() resolves DNS to validate the target IP, but subsequent fetch() calls resolve DNS independently. An attacker controlling a DNS server can exploit this gap via DNS rebinding to redirect requests to internal network addresses. This issue has been patched in version 2.21.7."}],"source":{"advisory":"GHSA-f7jj-p389-4w45","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-11T14:35:45.263376Z","id":"CVE-2026-42346","options":[{"Exploitation":"none"},{"Automatable":"no"},{"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":"2026-05-11T14:35:55.041Z"}}]}}