Medium severity5.9NVD Advisory· Published Sep 25, 2026· Updated Oct 23, 2026
CVE-2026-91766
CVE-2026-91766
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 ).
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
43- osv-coords41 versionspkg:rpm/almalinux/php-clipkg:rpm/almalinux/php-pecl-apcupkg:rpm/almalinux/php-processpkg:bitnami/libphppkg:rpm/almalinux/php-pearpkg:rpm/almalinux/php-jsonpkg:rpm/almalinux/php-pdopkg:rpm/almalinux/php-embeddedpkg:rpm/almalinux/libzippkg:rpm/almalinux/libzip-toolspkg:rpm/almalinux/phppkg:rpm/almalinux/php-commonpkg:rpm/almalinux/php-dbapkg:rpm/almalinux/php-dbgpkg:rpm/almalinux/php-develpkg:rpm/almalinux/php-enchantpkg:rpm/almalinux/php-ffipkg:rpm/almalinux/php-fpmpkg:rpm/almalinux/php-gdpkg:rpm/almalinux/php-gmppkg:rpm/almalinux/php-intlpkg:rpm/almalinux/php-pecl-rrdpkg:rpm/almalinux/php-pecl-xdebugpkg:rpm/almalinux/php-pecl-zippkg:rpm/almalinux/php-snmppkg:rpm/almalinux/php-xmlrpcpkg:rpm/almalinux/libzip-develpkg:rpm/almalinux/php-odbcpkg:rpm/almalinux/php-soappkg:rpm/opensuse/php8&distro=openSUSE%20Tumbleweedpkg:bitnami/php-minpkg:bitnami/phppkg:rpm/almalinux/apcu-panelpkg:rpm/almalinux/php-xmlpkg:rpm/almalinux/php-ldappkg:rpm/almalinux/php-mbstringpkg:rpm/almalinux/php-mysqlndpkg:rpm/almalinux/php-pgsqlpkg:rpm/almalinux/php-opcachepkg:rpm/almalinux/php-bcmathpkg:rpm/almalinux/php-pecl-apcu-devel
< 7.4.33-8.module_el8.10.0+4321+cf5fd4bb+ 40 more
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 5.1.18-1.module_el8.10.0+3935+28808425
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: >= 8.2.0, < 8.2.34
- (no CPE)range: < 1:1.10.13-1.module_el8.10.0+3935+28808425
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 1.6.1-1.module_el8.6.0+2750+78feabcb
- (no CPE)range: < 1.6.1-1.module_el8.10.0+3935+28808425
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 2.0.1-1.module_el8.6.0+2750+78feabcb
- (no CPE)range: < 2.9.5-1.module_el8.6.0+3239+bedf0508
- (no CPE)range: < 1.18.2-1.module_el8.10.0+3935+28808425
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 1.6.1-1.module_el8.10.0+3935+28808425
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 8.5.11-1.1
- (no CPE)range: >= 8.2.0, < 8.2.34
- (no CPE)range: >= 8.2.0, < 8.2.34
- (no CPE)range: < 5.1.18-1.module_el8.6.0+2750+78feabcb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 7.4.33-8.module_el8.10.0+4321+cf5fd4bb
- (no CPE)range: < 5.1.18-1.module_el8.6.0+2750+78feabcb
Patches
Vulnerability mechanics
References
1- github.com/php/php-src/security/advisories/GHSA-fpwc-w8rq-cr92nvdVendor AdvisoryExploit
News mentions
1- PHP Fixed a Bug That Could Send Your Login Credentials to the Wrong ServerCyber Security News · Sep 28, 2026