{"id":"CVE-2023-22465","summary":"Http4s has fatal error parsing User-Agent and Server headers","details":"Http4s is a Scala interface for HTTP services. Starting with version 0.1.0 and prior to versions 0.21.34, 0.22.15, 0.23.17, and 1.0.0-M38, the `User-Agent` and `Server` header parsers are susceptible to a fatal error on certain inputs.  In http4s, modeled headers are lazily parsed, so this only applies to services that explicitly request these typed headers. Fixes are released in 0.21.34, 0.22.15, 0.23.17, and 1.0.0-M38. As a workaround, use the weakly typed header interface.","aliases":["GHSA-54w6-vxfh-fw7f"],"modified":"2026-04-10T04:55:23.503567Z","published":"2023-01-04T15:30:04.129Z","database_specific":{"cwe_ids":["CWE-20"],"cna_assigner":"GitHub_M","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/22xxx/CVE-2023-22465.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/22xxx/CVE-2023-22465.json"},{"type":"ADVISORY","url":"https://github.com/http4s/http4s/security/advisories/GHSA-54w6-vxfh-fw7f"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-22465"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/http4s/http4s","events":[{"introduced":"1cb3dd7d66767ad02f6431d290ca14c07ec99c30"},{"fixed":"f09ae5a20f23798f10537dc3684b614d0c454fea"}],"database_specific":{"versions":[{"introduced":"0.1.0"},{"fixed":"0.21.34"}]}},{"type":"GIT","repo":"https://github.com/http4s/http4s","events":[{"introduced":"3e98ea4a63e741c7f9d5e917d48d2ee8fab54476"},{"fixed":"3eade0b5c8d6a8271444604760912c861807d0b9"}],"database_specific":{"versions":[{"introduced":"0.22.0"},{"fixed":"0.22.15"}]}},{"type":"GIT","repo":"https://github.com/http4s/http4s","events":[{"introduced":"06db471f053023ce3ffd7c568ce46d33551d1d69"},{"fixed":"cc61c693e4f78d84f77f0ac8e7f6431fe72f4cc4"}],"database_specific":{"versions":[{"introduced":"0.23.0"},{"fixed":"0.23.17"}]}},{"type":"GIT","repo":"https://github.com/http4s/http4s","events":[{"introduced":"756ce63aee681c5b632bbeafe0b8fde2f3d237f4"},{"fixed":"fcc1dd91b4ab9cb63eed1007bafdc122603bad3b"}],"database_specific":{"versions":[{"introduced":"1.0.0-M1"},{"fixed":"1.0.0-M38"}]}}],"versions":["v0.1.0","v0.10.0","v0.11.0","v0.12.0","v0.13.0","v0.14.0","v0.14.1","v0.17.0-M1","v0.18.0","v0.18.0-M1","v0.18.0-M2","v0.18.0-M3","v0.18.0-M4","v0.18.0-M5","v0.18.0-M6","v0.18.0-M7","v0.18.0-M8","v0.18.0-M9","v0.19.0","v0.19.0-M1","v0.19.0-M2","v0.19.0-M3","v0.2.0","v0.20.0","v0.20.0-M1","v0.20.0-M2","v0.20.0-M3","v0.20.0-M4","v0.20.0-M5","v0.20.0-M6","v0.20.0-M7","v0.20.0-RC1","v0.21.0","v0.21.0-M1","v0.21.0-M3","v0.21.0-M4","v0.21.0-M5","v0.21.0-M6","v0.21.0-RC1","v0.21.0-RC2","v0.21.0-RC3","v0.21.0-RC4","v0.21.0-RC5","v0.21.1","v0.21.11","v0.21.12","v0.21.13","v0.21.14","v0.21.15","v0.21.16","v0.21.18","v0.21.19","v0.21.20","v0.21.21","v0.21.22","v0.21.23","v0.21.25","v0.21.26","v0.21.27","v0.21.28","v0.21.3","v0.21.30","v0.21.31","v0.21.32","v0.21.33","v0.21.4","v0.21.5","v0.21.6","v0.21.7","v0.21.8","v0.21.9","v0.23.0","v0.23.0-M1","v0.23.1","v0.23.10","v0.23.11","v0.23.12","v0.23.13","v0.23.14","v0.23.15","v0.23.16","v0.23.2","v0.23.3","v0.23.5","v0.23.6","v0.23.7","v0.23.8","v0.23.9","v0.3.0","v0.5.0","v0.6.0","v0.7.0","v0.8.1","v0.9.0","v1.0.0-M1","v1.0.0-M10","v1.0.0-M11","v1.0.0-M12","v1.0.0-M13","v1.0.0-M15","v1.0.0-M16","v1.0.0-M17","v1.0.0-M19","v1.0.0-M2","v1.0.0-M20","v1.0.0-M21","v1.0.0-M22","v1.0.0-M24","v1.0.0-M26","v1.0.0-M28","v1.0.0-M29","v1.0.0-M3","v1.0.0-M30","v1.0.0-M31","v1.0.0-M32","v1.0.0-M33","v1.0.0-M34","v1.0.0-M35","v1.0.0-M36","v1.0.0-M37","v1.0.0-M4","v1.0.0-M5","v1.0.0-M6","v1.0.0-M7","v1.0.0-M8","v1.0.0-M9"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-22465.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}