FKIE_CVE-2026-46579

Vulnerability from fkie_nvd - Published: 2026-05-29 11:16 - Updated: 2026-07-21 14:16
Severity
7.4 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
7.4 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Summary
A flaw was found in the OpenShift Router. When a Route has `insecureEdgeTerminationPolicy` set to Allow, the HTTP frontend does not remove `X-SSL-Client-*` headers from incoming requests. This allows an unauthenticated attacker to send plain HTTP requests with crafted `X-SSL-Client-*` headers. As a result, backends relying on these headers for mutual TLS (Transport Layer Security) authentication can be bypassed, enabling the attacker to impersonate client certificate identities.
References
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:27009
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:27044
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:27063
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:37580
secalert@redhat.comhttps://access.redhat.com/security/cve/CVE-2026-46579Vendor Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2483181Issue Tracking, Vendor Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:27009
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:27044
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:27063
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:37580
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/security/cve/CVE-2026-46579Vendor Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://bugzilla.redhat.com/show_bug.cgi?id=2483181Issue Tracking, Vendor Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46579.json
Impacted products
Vendor Product Version
redhat openshift_container_platform 4.0
redhat openshift_router -
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "cpes": [
            "cpe:/a:redhat:openshift:4.19::el9"
          ],
          "defaultStatus": "affected",
          "packageName": "openshift4/ose-haproxy-router-rhel9",
          "product": "Red Hat OpenShift Container Platform 4.19",
          "vendor": "Red Hat",
          "versions": [
            {
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              "status": "unaffected",
              "version": "1783445642",
              "versionType": "rpm"
            }
          ]
        },
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          "cpes": [
            "cpe:/a:redhat:openshift:4.20::el9"
          ],
          "defaultStatus": "affected",
          "packageName": "openshift4/ose-haproxy-router-rhel9",
          "product": "Red Hat OpenShift Container Platform 4.20",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "1781639027",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "cpes": [
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          ],
          "defaultStatus": "affected",
          "packageName": "openshift4/ose-haproxy-router-rhel9",
          "product": "Red Hat OpenShift Container Platform 4.21",
          "vendor": "Red Hat",
          "versions": [
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              "status": "unaffected",
              "version": "1781552170",
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            }
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          "cpes": [
            "cpe:/a:redhat:openshift:4.22::el9"
          ],
          "defaultStatus": "affected",
          "packageName": "openshift4/ose-haproxy-router-rhel9",
          "product": "Red Hat OpenShift Container Platform 4.22",
          "vendor": "Red Hat",
          "versions": [
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          ],
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          "product": "Red Hat OpenShift Container Platform 4",
          "vendor": "Red Hat"
        }
      ],
      "source": "secalert@redhat.com"
    },
    {
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          "product": "Red Hat OpenShift Container Platform 4.19",
          "vendor": "Red Hat",
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          "packageName": "openshift4/ose-haproxy-router-rhel9",
          "product": "Red Hat OpenShift Container Platform 4.2",
          "vendor": "Red Hat",
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          "packageName": "openshift4/ose-haproxy-router-rhel9",
          "product": "Red Hat OpenShift Container Platform 4.21",
          "vendor": "Red Hat",
          "versions": [
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          "cpes": [
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          "defaultStatus": "affected",
          "packageName": "openshift4/ose-haproxy-router-rhel9",
          "product": "Red Hat OpenShift Container Platform 4.22",
          "vendor": "Red Hat",
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          ]
        },
        {
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          "cpes": [
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          ],
          "defaultStatus": "affected",
          "packageName": "openshift4/ose-haproxy-router",
          "product": "Red Hat OpenShift Container Platform 4",
          "vendor": "Red Hat"
        }
      ],
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "932D137F-528B-4526-9A89-CD59FA1AB0FE",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:redhat:openshift_router:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "EB6C1612-6A17-4F3B-B170-7C9F6028FBBB",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in the OpenShift Router. When a Route has `insecureEdgeTerminationPolicy` set to Allow, the HTTP frontend does not remove `X-SSL-Client-*` headers from incoming requests. This allows an unauthenticated attacker to send plain HTTP requests with crafted `X-SSL-Client-*` headers. As a result, backends relying on these headers for mutual TLS (Transport Layer Security) authentication can be bypassed, enabling the attacker to impersonate client certificate identities."
    },
    {
      "lang": "es",
      "value": "Se encontr\u00f3 una vulnerabilidad en el OpenShift Router. Cuando una Ruta tiene \u0027insecureEdgeTerminationPolicy\u0027 configurado en Allow, el frontend HTTP no elimina los encabezados \u0027X-SSL-Client-*\u0027 de las solicitudes entrantes. Esto permite a un atacante no autenticado enviar solicitudes HTTP en texto plano con encabezados \u0027X-SSL-Client-*\u0027 manipulados. Como resultado, los backends que dependen de estos encabezados para la autenticaci\u00f3n mutua TLS (Transport Layer Security) pueden ser eludidos, permitiendo al atacante suplantar identidades de certificados de cliente."
    }
  ],
  "id": "CVE-2026-46579",
  "lastModified": "2026-07-21T14:16:34.093",
  "metrics": {
    "cvssMetricV31": [
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        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.4,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "version": "3.1"
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        "impactScore": 5.2,
        "source": "secalert@redhat.com",
        "type": "Secondary"
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          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
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          "confidentialityImpact": "HIGH",
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          "role": "CISA Coordinator",
          "timestamp": "2026-05-29T13:16:55.280769Z",
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  "published": "2026-05-29T11:16:17.050",
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.