MSRXMSRXSecurity
Vulnerabilities / CVE-2026-104939

CVE-2026-104939

Published 2026-10-14 · published (not yet in NVD)

CVE-2026-104939

NGINX Ingress Controller vulnerability

8.7 HIGH
CVSS 4.0 · CNA
0.4%
chance of exploitation in the next 30 days (EPSS; higher than 31% of CVEs)

Description NGINX 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. Impact This vulnerability may allow remote attackers unauthenticated access to protected paths. There is no control plane exposure; this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Scores

7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NCNA
8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:NCNA

Affected products

  • F5 NGINX Ingress Controller: 5.6.0 to < 5.7.0

Weakness: CWE-303

1 references (advisories, patches, write-ups)

Sources: CVE.org, FIRST EPSS. Missing ones did not answer or have no record yet.

Look up another CVECheck your dependenciesScan a website