CVE-2026-42965Openshift/router: openshift/router: cloud metadata ssrf via fqdn-typed endpointslice bypasses destination validation
- 7.7HighCVSS base score
- 0.40%Exploitation in 30 daysEPSS · top 66% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
A flaw was found in the OpenShift Router. A user with EndpointSlice write access can exploit this vulnerability by creating a Service backed by an FQDN (Fully Qualified Domain Name) EndpointSlice that resolves to a cloud metadata endpoint. This allows the router to proxy requests to the cloud metadata endpoint, leading to the disclosure of instance credentials and other sensitive metadata. This bypasses previous security measures for validating IP addresses.
Timeline
ID reserved
By redhat
- 1 day later
· 1 day later
Published
- 5 months later
· 5 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 | High7.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
| redhat-SADPADP (enrichment) | 3.1 | High7.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
| NVDNVD · Modified | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.40% · top 66% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.7.
Affected products
Red Hat · Red Hat OpenShift Container Platform 4.17
- unaffected 1789938693 – < *
Red Hat · Red Hat OpenShift Container Platform 4.18
- unaffected 1788578875 – < *
Red Hat · Red Hat OpenShift Container Platform 4.19
- unaffected 1786771399 – < *
Red Hat · Red Hat OpenShift Container Platform 4.20
- unaffected 1786496552 – < *
Red Hat · Red Hat OpenShift Container Platform 4.21
- unaffected 1786498169 – < *
Red Hat · Red Hat OpenShift Container Platform 4.22
- unaffected 1786584196 – < *
Red Hat · Red Hat OpenShift Container Platform 4
All versions: affected
Red Hat · Red Hat OpenShift Container Platform 5
All versions: affected
References
References9
- RHSA-2026:54583 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:54602 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:54770 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:57408 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:65852 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:70587 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-42965 (opens in a new tab)vdb-entryx_refsource_REDHAT
- RHBZ#2483184 (opens in a new tab)issue-trackingx_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42965.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-2026-33275 (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-2026-42965)Record last updated .