CVE-2026-128023

EUVD-2026-125079
FrankenPHP before 1.13.0 contains an authentication bypass vulnerability that allows unauthenticated attackers to spoof trusted headers by sending dot-form header names that PHP rewrites to underscores. Attackers can send headers like X.Authenticated.User or X.Forwarded.For that map to $_SERVER keys, spoofing user identity, client IP, or scheme.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
VulnCheckCNA
7.4 HIGH
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 44.17%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources (CNA/ADP records, vendor advisories, Enginsight analysis).
VendorProductVersionSource
phpfrankenphp
𝑥
< 1.13.0
CNA
Common Weakness Enumeration
References
https://github.com/php/frankenphp/security/advisories/GHSA-qcrp-8483-f2f2
https://www.vulncheck.com/advisories/frankenphp-before-1.13.0-authentication-bypass-via-dot-form-header-name-aliasing