{"id":"CVE-2026-91766","published":"2026-09-25T21:17:24.673","lastModified":"2026-09-29T21:27:41.130","description":"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 ).","cvssScore":5.9,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","cwes":["CWE-200","CWE-522"],"vendors":[],"products":[],"references":[{"url":"https://github.com/php/php-src/security/advisories/GHSA-fpwc-w8rq-cr92","tags":[]}],"exploitRefs":[{"url":"https://github.com/php/php-src/security/advisories/GHSA-fpwc-w8rq-cr92","tags":[]}],"hasPoc":true,"ai":null}