CVE-2021-39185

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In http4s versions 0.21.26 and prior, 0.22.0 through 0.22.2, 0.23.0, 0.23.1, and 1.0.0-M1 through 1.0.0-M24, the default CORS configuration is vulnerable to an origin reflection attack. The middleware is also susceptible to a Null Origin Attack. The problem is fixed in 0.21.27, 0.22.3, 0.23.2, and 1.0.0-M25. The original `CORS` implementation and `CORSConfig` are deprecated. See the GitHub GHSA for more information, including code examples and workarounds."}, {"lang": "es", "value": "Http4s es una interfaz m\u00ednima e idiom\u00e1tica de Scala para servicios HTTP. En http4s versiones 0.21.26 y anteriores, 0.22.0 hasta 0.22.2, 0.23.0, 0.23.1, y 1.0.0-M1 hasta 1.0.0-M24, la configuraci\u00f3n CORS predeterminada es vulnerable a un ataque de reflexi\u00f3n de origen. El middleware tambi\u00e9n es susceptible a un ataque de Origen Nulo. El problema se ha corregido en las versiones 0.21.27, 0.22.3, 0.23.2 y 1.0.0-M25. La implementaci\u00f3n original de \"CORS\" y \"CORSConfig\" est\u00e1n obsoletas. Consulte el GHSA de GitHub para conseguir m\u00e1s informaci\u00f3n, incluyendo ejemplos de c\u00f3digo y soluciones"}], "id": "CVE-2021-39185", "lastModified": "2026-06-17T04:03:16.257", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 6.4, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 4.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.2, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2021-09-01T20:15:07.447", "references": [{"source": "security-advisories@github.com", "tags": ["Third Party Advisory"], "url": "https://github.com/http4s/http4s/releases/tag/v0.23.2"}, {"source": "security-advisories@github.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/http4s/http4s/security/advisories/GHSA-52cf-226f-rhr6"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://github.com/http4s/http4s/releases/tag/v0.23.2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/http4s/http4s/security/advisories/GHSA-52cf-226f-rhr6"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-346"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

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