{"id":"CVE-2026-59882","summary":"guzzlehttp/psr7: Host Confusion via Weak URI Host Validation","details":"guzzlehttp/psr7 is a PSR-7 HTTP message library implementation in PHP. Prior to 2.12.3, Uri::assertValidHost() does not reject URI host components containing authority delimiters, embedded ports, or malformed IPv6 brackets, allowing Uri::getHost() to disagree with the URI authority used for security or routing decisions. This issue is fixed in version 2.12.3.","aliases":["GHSA-c2w2-prh8-qm98"],"modified":"2026-07-15T01:49:18.761679611Z","published":"2026-07-08T15:50:03.077Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-436"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59882.json"},"references":[{"type":"WEB","url":"https://github.com/guzzle/psr7/releases/tag/2.12.3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59882.json"},{"type":"ADVISORY","url":"https://github.com/guzzle/psr7/security/advisories/GHSA-c2w2-prh8-qm98"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59882"},{"type":"FIX","url":"https://github.com/guzzle/psr7/commit/ddd64f17d4cc1f7e5ffe6fd2c989ec7221712580"},{"type":"FIX","url":"https://github.com/guzzle/psr7/pull/811"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/guzzle/psr7","events":[{"introduced":"0"},{"fixed":"ddd64f17d4cc1f7e5ffe6fd2c989ec7221712580"},{"fixed":"7ec62dc3f44aa218487dbed81a9bf9bc647be55d"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"2.12.3"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["2.12.2","2.12.1","2.12.0","2.11.1","2.11.0","2.10.1","2.10.0","2.9.0","2.8.1","2.8.0","2.7.1","2.7.0","2.6.3","2.6.2","2.6.1","2.6.0","2.5.0","2.4.4","2.4.3","2.4.2","2.4.1","2.4.0","2.3.0","2.2.2","2.2.1","2.2.0","2.1.0","2.0.0","2.0.0-rc1","2.0.0-beta1","1.6.0","1.5.0","1.5.2","1.5.1","1.4.2","1.4.1","1.4.0","1.3.1","1.3.0","1.2.3","1.2.2","1.2.1","1.2.0","1.1.0","1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-59882.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N"}]}