{"id":"CVE-2026-104939","title":"Description\nNGINX Ingress Controller has a vulnerability when implementing an externalAuth policy for ingress","summary":"Description\nNGINX Ingress Controller has a vulnerability when implementing an externalAuth policy for ingress. NGINX Ingress Controller may mishandle the HTTP response from an OAuth IdP and allow an attacker to acquire unauthenticated ac…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-303"],"published":"2026-10-14","updated":"2026-10-14","sourceUpdated":"2026-10-14T16:04:11.750","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-104939","references":[{"url":"https://my.f5.com/manage/s/article/K000162617","label":"f5sirt@f5.com"}],"tags":["nvd"],"ingestedAt":"2026-10-14T15:36:13.996Z","slug":"CVE-2026-104939","body":"## Overview\n\nDescription\nNGINX Ingress Controller has a vulnerability when implementing an externalAuth policy for ingress. NGINX Ingress Controller may mishandle the HTTP response from an OAuth IdP and allow an attacker to acquire unauthenticated access to protected paths before the proper external authentication can happen.\n\n\n\nImpact\nThis vulnerability may allow remote attackers \n\nunauthenticated\n\n access to protected \n\npaths. There is no control plane exposure; this is a data plane issue only.\n\n\n\n\nNote: Software versions which have reached End of Technical Support (EoTS) are not evaluated.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}