{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-54282", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-12T17:46:37.292Z", "datePublished": "2026-06-22T16:45:01.629Z", "dateUpdated": "2026-06-22T17:26:58.637Z"}, "containers": {"cna": {"title": "Starlette: Unvalidated request path concatenated into authority poisons request.url.hostname", "problemTypes": [{"descriptions": [{"cweId": "CWE-706", "lang": "en", "description": "CWE-706: Use of Incorrectly-Resolved Name or Reference", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 3.7, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/Kludex/starlette/security/advisories/GHSA-jp82-jpqv-5vv3", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/Kludex/starlette/security/advisories/GHSA-jp82-jpqv-5vv3"}], "affected": [{"vendor": "Kludex", "product": "starlette", "versions": [{"version": "< 1.3.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-06-22T16:45:01.629Z"}, "descriptions": [{"lang": "en", "value": "Starlette is a lightweight ASGI framework/toolkit. Prior to 1.3.0, the HTTP request path is not validated before being used to reconstruct request.url. Because request.url is rebuilt by concatenating {scheme}://{host}{path} and re-parsing the result, a path that does not begin with / (for example @google.com) moves the authority boundary during re-parsing, so request.url.hostname and request.url.netloc become attacker-controlled. Code that reads request.url.hostname (rather than the Host header or scope) can therefore be misled into trusting an attacker-supplied host. This vulnerability is fixed in 1.3.0."}], "source": {"advisory": "GHSA-jp82-jpqv-5vv3", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-06-22T17:26:39.551031Z", "id": "CVE-2026-54282", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-22T17:26:58.637Z"}}]}}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.3.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "starlette", "source": "cna", "vendor": "Kludex"}, "product": "starlette", "vendor": "kludex"}], "created": "2026-06-22T18:45:04.325715+00:00", "updated": "2026-06-22T20:15:04.388413+00:00", "vendors": ["kludex", "kludex$PRODUCT$starlette"]}