CVE-2026-46579Openshift/router: openshift/router: mtls client certificate spoofing via unstripped x-ssl-client headers on http frontend
- 7.4HighCVSS base score
- 0.45%Exploitation in 30 daysEPSS · top 61% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By redhat
- 1 day later
· 1 day later
Published
- 3 months later
· 3 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| redhatCNA (assigner) | 3.1 | High7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
| redhat-SADPADP (enrichment) | 3.1 | High7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
- EPSS (exploitation in 30 days)
- 0.45% · top 61% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.4.
Affected products
Red Hat · Red Hat OpenShift Container Platform 4.12
- unaffected 1784323891 – < *
Red Hat · Red Hat OpenShift Container Platform 4.13
- unaffected 1784056734 – < *
Red Hat · Red Hat OpenShift Container Platform 4.14
- unaffected 1784587649 – < *
Red Hat · Red Hat OpenShift Container Platform 4.15
- unaffected 1784580646 – < *
Red Hat · Red Hat OpenShift Container Platform 4.16
- unaffected 1784331638 – < *
Red Hat · Red Hat OpenShift Container Platform 4.17
- unaffected 1784321465 – < *
Red Hat · Red Hat OpenShift Container Platform 4.18
- unaffected 1783719377 – < *
Red Hat · Red Hat OpenShift Container Platform 4.19
- unaffected 1783445642 – < *
Red Hat · Red Hat OpenShift Container Platform 4.20
- unaffected 1781639027 – < *
Red Hat · Red Hat OpenShift Container Platform 4.21
- unaffected 1781552170 – < *
Red Hat · Red Hat OpenShift Container Platform 4.22
- unaffected 1781643967 – < *
References
References14
- RHSA-2026:27009 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:27044 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:27063 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:37580 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:40022 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:40828 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:43227 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:43253 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:43331 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:47703 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:47728 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-46579 (opens in a new tab)vdb-entryx_refsource_REDHAT
- RHBZ#2483181 (opens in a new tab)issue-trackingx_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46579.json (opens in a new tab)x_sadp-csaf-vex
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-33274 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-46579)Record last updated .