Skip to content
Heist/ feed
High

NGINX Ingress Controller vulnerability

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

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
Read the original announcement