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CVE-2026-0650

Good to know:

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Date: January 6, 2026

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.

Severity Score

Related Resources (8)

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

Severity Score

Weakness Type (CWE)

Missing Authentication for Critical Function

CWE-306

Direct Request ('Forced Browsing')

CWE-425

Top Fix

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Upgrade Version

Upgrade to version github.com/openflagr/flagr - v0.0.0-20251009103504-fe83dc87aa40;https://github.com/openflagr/flagr.git - 1.1.19

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

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