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CVE-2026-35469VulnerabilityPublished Updated

Red Hat Security Advisory: OpenShift Virtualization v4.17 Images

Affects Red HatSource GCVE Database

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Authoritative record:CVE-2026-35469· High 8.7

Not known to be exploited · CVSS 8.7 High : upgrade Red Hat spdystream to 0.5.1 soon.

Data as of 3 Nov 2026, 11:17 UTC

CVSS 4.0 base score
8.7High
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 0.5.1
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 16 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 3 Nov 2026.

What to do

Upgrade spdystream and github.com/moby/spdystream to 0.5.1.

Affected software

ProductAffectedFixed in
mobyspdystreamAffected
  • <0.5.1
Fixed in
  • 0.5.1
Gogithub.com/moby/spdystreampkg:golang/github.com/moby/spdystreamOther threatsAffected
  • <0.5.1
Fixed in
  • 0.5.1

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Red Hat recommends reviewing and restricting the assignment of Kubernetes cluster roles that allow pod port forwarding (create), pod execution (create), pod attachment (create), and node proxying (get/create) to only trusted and authorized users or service accounts. Modifying RBAC policies should be done carefully and tested thoroughly, as these permissions are required for certain application and service functionalities.

Description

CVE-2026-35469 is a denial of service vulnerability in the SPDY streaming code used by Kubelet, CRI-O, and kube-apiserver components of OpenShift Container Platform. An attacker with specific elevated Kubernetes cluster roles related to pod port forwarding, execution, attachment, or node proxying could exploit this flaw to cause these components to become unresponsive. The vulnerability affects OpenShift Virtualization v4.17 images. Mitigation involves restricting these sensitive cluster roles to trusted users only.

References

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