{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-91766","assignerOrgId":"dd77f84a-d19a-4638-8c3d-a322d820ed2b","state":"PUBLISHED","assignerShortName":"php","dateReserved":"2026-09-15T00:38:24.146Z","datePublished":"2026-09-25T20:40:25.040Z","dateUpdated":"2026-09-28T13:31:31.921Z"},"containers":{"cna":{"providerMetadata":{"orgId":"dd77f84a-d19a-4638-8c3d-a322d820ed2b","shortName":"php","dateUpdated":"2026-09-25T20:40:25.040Z"},"title":"Cross-origin credential leak in HTTP stream wrapper redirects","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-200","description":"CWE-200","type":"CWE"}]},{"descriptions":[{"lang":"en","cweId":"CWE-522","description":"CWE-522","type":"CWE"}]}],"impacts":[{"descriptions":[{"lang":"en","value":"CWE-200"}]}],"affected":[{"vendor":"PHP Group","product":"PHP","packageName":"ext-standard","versions":[{"status":"affected","version":"8.2.*","lessThan":"8.2.34","versionType":"semver"},{"status":"affected","version":"8.3.*","lessThan":"8.3.35","versionType":"semver"},{"status":"affected","version":"8.4.*","lessThan":"8.4.26","versionType":"semver"},{"status":"affected","version":"8.5.*","lessThan":"8.5.11","versionType":"semver"}],"defaultStatus":"unaffected"}],"descriptions":[{"lang":"en","value":"When the http:// stream wrapper follows a redirect it forwards the user-supplied Authorization, Cookie and Proxy-Authorization headers unchanged, even when the redirect target is a different host, a different port, or a downgrade from HTTPS to HTTP. A server that can steer a redirect therefore receives credentials that were only meant for the original origin. This is the same class of issue that libcurl fixed in 7.58.0 ( CVE-2018-1000007 https://github.com/advisories/GHSA-g7x2-hrfp-pv5f ).","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>When the <code>http://</code> stream wrapper follows a redirect it forwards the user-supplied <code>Authorization</code>, <code>Cookie</code> and <code>Proxy-Authorization</code> headers unchanged, even when the redirect target is a different host, a different port, or a downgrade from HTTPS to HTTP. A server that can steer a redirect therefore receives credentials that were only meant for the original origin. This is the same class of issue that libcurl fixed in 7.58.0 (<a title=\"CVE-2018-1000007\" href=\"https://github.com/advisories/GHSA-g7x2-hrfp-pv5f\">CVE-2018-1000007</a>).</p>"}]}],"references":[{"url":"https://github.com/php/php-src/security/advisories/GHSA-fpwc-w8rq-cr92","tags":["vendor-advisory"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE","baseSeverity":"MEDIUM","baseScore":5.9,"vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"}}],"credits":[{"lang":"en","value":"@q2a3z (GitHub)","type":"reporter"},{"lang":"en","value":"Ilia Alshanetsky","type":"reporter"},{"lang":"en","value":"Alexandre Daubois","type":"remediation developer"},{"lang":"en","value":"Tim Düsterhus","type":"remediation reviewer"},{"lang":"en","value":"Arnaud Le Blanc","type":"remediation reviewer"},{"lang":"en","value":"Jakub Zelenka","type":"remediation reviewer"}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 1.0.5"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-91766","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-09-28T12:56:20.823835Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-28T13:31:31.921Z"}}]}}