{"id":"CVE-2026-54494","state":"PUBLISHED","title":"Koel: Full-read SSRF via podcast enclosure URL: isPublicHost() filter_var guard does not reject NAT64 (64:ff9b::/96) or 6to4 (2002::/16) IPv6-transition wrappers of internal IPv4","description":"Koel is a free, open-source music streaming solution. Prior to 9.7.1, App\\Helpers\\Network::isPublicHost() uses filter_var() with FILTER_FLAG_NO_PRIV_RANGE and FILTER_FLAG_NO_RES_RANGE, which treats NAT64 64:ff9b::/96 and 6to4 2002::/16 wrappers of private, loopback, or link-local IPv4 addresses as public. An authenticated user can place such an address in a podcast RSS <enclosure url> and reach app/Values/Podcast/EpisodePlayable.php through EpisodePlayable::createForEpisode(), where isSafeUrl() accepts the target and Http::sink($file)->get($url) fetches it. On a host with NAT64 or 6to4 routing, Koel can request internal services or cloud metadata and return the response body to the user. This issue is fixed in version 9.7.1","publishedAt":"2026-08-19T20:46:01.824Z","updatedAt":"2026-08-25T14:14:08.109Z","severity":{"score":5.3,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["koel koel"],"affected":[{"vendor":"koel","product":"koel","versions":[{"version":"< 9.7.1","status":"affected"}]}],"references":["https://github.com/koel/koel/security/advisories/GHSA-rjg7-r26h-cfp2","https://github.com/koel/koel/pull/2549","https://github.com/koel/koel/commit/5f6ce2cefd08f437a269236b677ad971517ccbb6","https://github.com/koel/koel/releases/tag/v9.7.1"],"weaknesses":["CWE-918"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/54xxx/CVE-2026-54494.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-54494","state":"PUBLISHED","datePublished":"2026-08-19T20:46:01.824Z","dateUpdated":"2026-08-25T14:14:08.109Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-15T18:01:15.510Z"},"containers":{"cna":{"title":"Koel: Full-read SSRF via podcast enclosure URL: isPublicHost() filter_var guard does not reject NAT64 (64:ff9b::/96) or 6to4 (2002::/16) IPv6-transition wrappers of internal IPv4","descriptions":[{"lang":"en","value":"Koel is a free, open-source music streaming solution. Prior to 9.7.1, App\\Helpers\\Network::isPublicHost() uses filter_var() with FILTER_FLAG_NO_PRIV_RANGE and FILTER_FLAG_NO_RES_RANGE, which treats NAT64 64:ff9b::/96 and 6to4 2002::/16 wrappers of private, loopback, or link-local IPv4 addresses as public. An authenticated user can place such an address in a podcast RSS <enclosure url> and reach app/Values/Podcast/EpisodePlayable.php through EpisodePlayable::createForEpisode(), where isSafeUrl() accepts the target and Http::sink($file)->get($url) fetches it. On a host with NAT64 or 6to4 routing, Koel can request internal services or cloud metadata and return the response body to the user. This issue is fixed in version 9.7.1"}],"affected":[{"vendor":"koel","product":"koel","versions":[{"version":"< 9.7.1","status":"affected"}]}],"references":[{"url":"https://github.com/koel/koel/security/advisories/GHSA-rjg7-r26h-cfp2","name":"https://github.com/koel/koel/security/advisories/GHSA-rjg7-r26h-cfp2","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/koel/koel/pull/2549","name":"https://github.com/koel/koel/pull/2549","tags":["x_refsource_MISC"]},{"url":"https://github.com/koel/koel/commit/5f6ce2cefd08f437a269236b677ad971517ccbb6","name":"https://github.com/koel/koel/commit/5f6ce2cefd08f437a269236b677ad971517ccbb6","tags":["x_refsource_MISC"]},{"url":"https://github.com/koel/koel/releases/tag/v9.7.1","name":"https://github.com/koel/koel/releases/tag/v9.7.1","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/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":"2026-08-19T20:46:01.824Z"},"source":{"advisory":"GHSA-rjg7-r26h-cfp2","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/koel/koel/security/advisories/GHSA-rjg7-r26h-cfp2","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-25T14:12:28.795880Z","id":"CVE-2026-54494","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":"2026-08-25T14:14:08.109Z"}}]}}}