{"apiVersion":"1.0","identifier":"CVE-2026-41059","description":"OAuth2 Proxy is a reverse proxy that provides authentication using OAuth2 providers. Versions 7.5.0 through 7.15.1 have a configuration-dependent authentication bypass. Deployments are affected when all of the following are true: Use of `skip_auth_routes` or the legacy `skip_auth_regex`; use of patterns that can be widened by attacker-controlled suffixes, such as `^/foo/.*/bar$` causing potential exposure of `/foo/secret`; and protected upstream applications that interpret `#` as a fragment delimiter or otherwise route the request to the protected base path. In deployments that rely on these settings, an unauthenticated attacker can send a crafted request containing a number sign in the path, including the browser-safe encoded form `%23`, so that OAuth2 Proxy matches a public allowlist rule while the backend serves a protected resource. Deployments that do not use these skip-auth options, or that only allow exact public paths with tightly scoped method and path rules, are not affected....","publishedAt":"2026-04-22T00:16:27","lastModifiedAt":null,"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-41059","cvssScore":8.2,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","epssProbability":0.00275,"riskScore":0.84,"affectedProduct":"OAuth2 Proxy","affectedVersions":"<7.15.2","vulnerabilityType":"Core software","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-41059","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-41059","en":"https://www.redsauce.net/en/cves/CVE-2026-41059","fr":"https://www.redsauce.net/fr/cves/CVE-2026-41059","pt":"https://www.redsauce.net/pt/cves/CVE-2026-41059","de":"https://www.redsauce.net/de/cves/CVE-2026-41059","sk":"https://www.redsauce.net/sk/cves/CVE-2026-41059","el":"https://www.redsauce.net/el/cves/CVE-2026-41059"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-41059"}}