{"id":"CVE-2023-22465","state":"PUBLISHED","title":"Http4s has fatal error parsing User-Agent and Server headers","description":"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.","publishedAt":"2023-01-04T15:30:04.129Z","updatedAt":"2025-03-10T21:32:44.734Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["http4s http4s"],"affected":[{"vendor":"http4s","product":"http4s","versions":[{"version":">= 0.1.0, < 0.21.34","status":"affected"},{"version":">= 0.22.0, < 0.22.15","status":"affected"},{"version":">= 0.23.0, < 0.23.17","status":"affected"},{"version":">= 1.0.0-M1, < 1.0.0-M38","status":"affected"}]}],"references":["https://github.com/http4s/http4s/security/advisories/GHSA-54w6-vxfh-fw7f"],"weaknesses":["CWE-20"],"ingestedAt":"2026-10-29T20:05:43.909Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/22xxx/CVE-2023-22465.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2023-22465","state":"PUBLISHED","datePublished":"2023-01-04T15:30:04.129Z","dateUpdated":"2025-03-10T21:32:44.734Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2022-12-29T03:00:40.879Z"},"containers":{"cna":{"title":"Http4s has fatal error parsing User-Agent and Server headers","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"http4s","product":"http4s","versions":[{"version":">= 0.1.0, < 0.21.34","status":"affected"},{"version":">= 0.22.0, < 0.22.15","status":"affected"},{"version":">= 0.23.0, < 0.23.17","status":"affected"},{"version":">= 1.0.0-M1, < 1.0.0-M38","status":"affected"}]}],"references":[{"url":"https://github.com/http4s/http4s/security/advisories/GHSA-54w6-vxfh-fw7f","name":"https://github.com/http4s/http4s/security/advisories/GHSA-54w6-vxfh-fw7f","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-20","lang":"en","description":"CWE-20: Improper Input Validation","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2023-01-04T15:30:04.129Z"},"source":{"advisory":"GHSA-54w6-vxfh-fw7f","discovery":"UNKNOWN"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://github.com/http4s/http4s/security/advisories/GHSA-54w6-vxfh-fw7f","name":"https://github.com/http4s/http4s/security/advisories/GHSA-54w6-vxfh-fw7f","tags":["x_refsource_CONFIRM","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-02T10:13:48.417Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-03-10T21:02:19.525721Z","id":"CVE-2023-22465","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":"2025-03-10T21:32:44.734Z"}}]}}}