{"id":"CVE-2026-73629","summary":"Serendipity before 2.6.0 SSRF via hex IPv4 and IPv6 addresses","details":"Serendipity before 2.6.0 contains a server-side request forgery vulnerability in the serendipity_url_allowed() filter that fails to block hex-encoded IPv4 addresses, IPv6 literals, and link-local ranges. Authenticated users with adminImagesAdd permission can bypass the filter using alternate address formats to request internal services and retrieve response bodies through the public uploads directory.","aliases":["GHSA-2m48-gjj5-5x86"],"modified":"2026-09-11T03:30:35.021824232Z","published":"2026-08-13T11:28:27.670Z","database_specific":{"cwe_ids":["CWE-918"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73629.json","cna_assigner":"VulnCheck"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73629.json"},{"type":"ADVISORY","url":"https://github.com/s9y/Serendipity/security/advisories/GHSA-2m48-gjj5-5x86"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-73629"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/serendipity-before-ssrf-via-hex-ipv4-and-ipv6-addresses"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/s9y/serendipity","events":[{"introduced":"0"},{"fixed":"87696c92730d75785d17b515125be3862cdfb49e"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"2.6.0"}],"source":["AFFECTED_FIELD","DESCRIPTION"]}}],"versions":["2.6-beta1","2.5.0","2.5-beta1","2.4.0","2.4-beta1","2.3.0","2.3-rc1","2.3-beta1","2.2.1-alpha1","2.1.1","2.1.0","2.1-rc1","2.1-beta3","2.1-beta2","2.1-beta1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-73629.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N"}]}