GitHub Advisoryadvisory · Go
GHSA-rwp9-5g7q-73q3 OpenFlagr contains an authentication bypass vulnerability in the HTTP middleware
CRITICAL
Official page ↗
- Aliases
- CVE-2026-0650
- Ecosystem
- Go
- Packages
- github.com/openflagr/flagr
- Severity
- Critical
- CVSS vector
- 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
- Weaknesses
- CWE-306, CWE-425
- Reviewed
- 2026-01-07
Affected packages
• Go github.com/openflagr/flagr: < 0.0.0-20251009103504-fe83dc87aa40 → fixed in 0.0.0-20251009103504-fe83dc87aa40
Description
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.
Related
Alias · CVE (1)
- CVE-2026-0650 OpenFlagr versions prior to and including 1.1.18 contain an authentication bypass vulnerability in the HTTP middleware. vulnerability
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-0650 advisory
- https://github.com/openflagr/flagr/commit/fe83dc87aa404a57554aa5839ac450f55c203570 web
- https://dreyand.rs/code%20review/golang/2026/01/03/0day-speedrun-openflagr-less-1118-authentication-bypass web
- https://github.com/openflagr/flagr package
- https://github.com/openflagr/flagr/releases/tag/1.1.19 web
- https://www.vulncheck.com/advisories/openflagr-authentication-bypass-via-prefix-whitelist-path-normalization web