CVE-2026-104939
published 2026-10-14CVE-2026-104939: Description NGINX Ingress Controller has a vulnerability when implementing an externalAuth policy for ingress. NGINX Ingress Controller may mishandle the HTTP…
PriorityP353high7.5CVSS 3.1
AVNACLPRNUINSUCHINAN
EPSS
0.36%
28.4th percentile
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.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| f5 | nginx_ingress | — | — |
| f5 | nginx_ingress_controller | >= 5.6.0 < 5.7.0 | 5.7.0 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
nvdv4.08.7HIGHCVSS: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/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
F5
CVE-2026-104939: Description NGINX Ingress Controller has a vulnerability when implementing an externalAuth policy for ingress
vendor_f5·2026-10-14·CVSS 7.5
CVE-2026-104939 [HIGH] CWE-303 CVE-2026-104939: Description NGINX Ingress Controller has a vulnerability when implementing an externalAuth policy for ingress
CVE-2026-104939: Description
NGINX Ingress Controller has a vulnerability when implementing an externalAuth policy for ingress
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.
Affected Products: NGINX Ingress
F5 Advisory Articles: K000162617
F5 References: https://m
GHSA
Description NGINX Ingress Controller has a vulnerability when implementing an externalAuth policy for ingress.
ghsa_unreviewed·2026-10-14
CVE-2026-104939 [HIGH] CWE-303 Description NGINX Ingress Controller has a vulnerability when implementing an externalAuth policy for ingress.
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.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-10-14
Published