{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-48061", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-20T18:25:25.707Z", "datePublished": "2026-08-03T20:47:34.673Z", "dateUpdated": "2026-08-03T20:47:34.673Z"}, "containers": {"cna": {"title": "Litestar: AllowedHostsMiddleware bypasses host validation via client-controlled X-Forwarded-Host header", "problemTypes": [{"descriptions": [{"cweId": "CWE-644", "lang": "en", "description": "CWE-644: Improper Neutralization of HTTP Headers for Scripting Syntax", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/litestar-org/litestar/security/advisories/GHSA-3qmc-cj7q-62hv", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/litestar-org/litestar/security/advisories/GHSA-3qmc-cj7q-62hv"}, {"name": "https://github.com/litestar-org/litestar/commit/6930a20ceb543912cd651b42deae5b9f3637a262", "tags": ["x_refsource_MISC"], "url": "https://github.com/litestar-org/litestar/commit/6930a20ceb543912cd651b42deae5b9f3637a262"}], "affected": [{"vendor": "litestar-org", "product": "litestar", "versions": [{"version": "< 2.22.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-08-03T20:47:34.673Z"}, "descriptions": [{"lang": "en", "value": "Litestar is an Asynchronous Server Gateway Interface (ASGI) framework. In versions prior to 2.22.0, an attacker can bypass the allowed hosts validation by omitting the Host header and supplying an X-Forwarded-Host header set to a whitelisted domain. The AllowedHostsMiddleware trusts the X-Forwarded-Host header as a fallback when the Host header is absent. Since X-Forwarded-Host is a client-controllable header, this enables host header injection attacks such as password reset poisoning, cache poisoning, and server-side request routing manipulation. Any application using AllowedHostsConfig is affected when deployed without a reverse proxy that strips X-Forwarded-Host, or when accepting HTTP/1.0 connections. This issue has been fixed in version 2.22.0."}], "source": {"advisory": "GHSA-3qmc-cj7q-62hv", "discovery": "UNKNOWN"}}}}

{}

{}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.22.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "litestar", "source": "cna", "vendor": "litestar-org"}, "product": "litestar", "vendor": "litestar-org"}], "created": "2026-08-03T22:30:02.780089+00:00", "updated": "2026-08-03T22:30:02.780107+00:00", "vendors": ["litestar-org", "litestar-org$PRODUCT$litestar"]}