PT-2026-6480 · Go · Github.Com/Openflagr/Flagr

Published 2026-01-07 · Updated 2026-01-07

OSV

CVSS v4.0

9.3

Critical

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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.

Fix

Missing Authentication

Weakness Enumeration

CWE-425

CWE-306

Related Identifiers

GHSA-RWP9-5G7Q-73Q3

Affected Products

Github.Com/Openflagr/Flagr

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2026-0650 · Security Note
• https://osv.dev/vulnerability/GHSA-rwp9-5g7q-73q3 · Vendor Advisory
• https://github.com/openflagr/flagr/releases/tag/1.1.19 · Note
• https://github.com/openflagr/flagr/commit/fe83dc87aa404a57554aa5839ac450f55c203570 · Note
• https://github.com/openflagr/flagr · Note
• https://dreyand.rs/code%20review/golang/2026/01/03/0day-speedrun-openflagr-less-1118-authentication-bypass · Note
• https://vulncheck.com/advisories/openflagr-authentication-bypass-via-prefix-whitelist-path-normalization · Note