CVE-2026-0650criticalCWE-306CWE-425

CVE-2026-0650: critical vulnerability in OpenFlagr Flagr

OpenFlagr <= 1.1.18 Authentication Bypass via Prefix Whitelist Path Normalization

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43Vexday Risk Score

Patch soon. It has a working public exploit.

ssvc Attendcvss 9.3epss 1.5%
OpenFlagr versions prior to and including 1.1.18 contain an authentication bypass vulnerability in the HTTP middleware. Due to improper handling of path normalization in the whitelist logic, crafted requests can bypass authentication and access protected API endpoints without valid credentials. Unauthorized access may allow modification of feature flags and export of sensitive data.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
OpenFlagr · Flagr