GHSA-RWP9-5G7Q-73Q3

Vulnerability from github – Published: 2026-01-07 12:31 – Updated: 2026-01-07 19:31
VLAI?
Summary
OpenFlagr contains an authentication bypass vulnerability in the HTTP middleware
Details

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 ?
9.3 (Critical)
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
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/openflagr/flagr"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.0.0-20251009103504-fe83dc87aa40"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-0650"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-306",
      "CWE-425"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-01-07T19:31:31Z",
    "nvd_published_at": "2026-01-07T12:17:07Z",
    "severity": "CRITICAL"
  },
  "details": "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.",
  "id": "GHSA-rwp9-5g7q-73q3",
  "modified": "2026-01-07T19:31:31Z",
  "published": "2026-01-07T12:31:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-0650"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openflagr/flagr/commit/fe83dc87aa404a57554aa5839ac450f55c203570"
    },
    {
      "type": "WEB",
      "url": "https://dreyand.rs/code%20review/golang/2026/01/03/0day-speedrun-openflagr-less-1118-authentication-bypass"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/openflagr/flagr"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openflagr/flagr/releases/tag/1.1.19"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/openflagr-authentication-bypass-via-prefix-whitelist-path-normalization"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "OpenFlagr contains an authentication bypass vulnerability in the HTTP middleware"
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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