{"id":"CVE-2026-104939","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-104939","generatedAt":"2026-10-28T00:51:41.539Z","title":"Description NGINX Ingress Controller has a vulnerability when implementing an externalAuth policy for ingress.","description":"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 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.","published":"2026-10-14T15:17:05.000Z","lastModified":"2026-10-15T17:17:12.000Z","status":"Awaiting Analysis","sourceIdentifier":"f5sirt@f5.com","cvss":{"version":"4.0","score":8.7,"severity":"HIGH","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-303"],"affected":[],"epss":{"score":0.00377,"percentile":0.31428,"date":"2026-10-26","history":[{"date":"2026-10-15","score":0.00359,"percentile":0.28007}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.38%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-14T15:17:05.000Z","detail":{"score":"8.7","severity":"HIGH","publishedAt":"2026-10-14T15:17:05.260Z"},"summary":"New CVE, high severity (CVSS 8.7)."}],"references":[{"url":"https://my.f5.com/manage/s/article/K000162617","source":"f5sirt@f5.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-104939","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}