CVE-2026-91766 (GCVE-0-2026-91766)

Vulnerability from cvelistv5 – Published: 2026-09-25 20:40 – Updated: 2026-09-28 13:31
VLAI
Title
Cross-origin credential leak in HTTP stream wrapper redirects
Summary
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 ).
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-28 12:56 UTC
CWE
Assigner
php CNA under the mitre root
CNA scorecard B 80/100 over 25 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
PHP Group PHP Affected: 8.2.* , < 8.2.34 (semver)
Affected: 8.3.* , < 8.3.35 (semver)
Affected: 8.4.* , < 8.4.26 (semver)
Affected: 8.5.* , < 8.5.11 (semver)
guessed Create a notification for this product.
Credits
@q2a3z (GitHub) Ilia Alshanetsky Alexandre Daubois Tim Düsterhus Arnaud Le Blanc Jakub Zelenka
Show details on NVD website
To clipboard 

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