NGINX Ingress Controller vulnerability
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.
CVE-2026-104939
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-104939
NGINX Ingress Controller
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "F5",
"modules": [
"NIC"
],
"product": "NGINX Ingress Controller",
"versions": [
{
"status": "affected",
"version": "5.6.0",
"lessThan": "5.7.0",
"versionType": "custom"
}
],
"defaultStatus": "unknown"
}
]- Related CVEs
- CVE-2026-104939
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #29798 · Revision 1
- Added to Heist Feed
- Publisher date