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CVE-2026-33186VulnerabilityPublished

Red Hat Security Advisory: OpenShift Virtualization v4.17 Images

Affects Red HatSource GCVE Database

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Authoritative record:CVE-2026-33186· Critical 9.1

Not known to be exploited · CVSS 9.1 Critical : upgrade Red Hat grpc-go to 1.79.3 as a priority.

Data as of 3 Nov 2026, 04:43 UTC

CVSS 3.1 base score
9.1Critical
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 1.79.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 20 Mar 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 2 Nov 2026.

What to do

Upgrade grpc-go and github.com/grpc/grpc-go to 1.79.3.

Affected software

ProductAffectedFixed in
grpcgrpc-goAffected
  • <1.79.3
Fixed in
  • 1.79.3
Gogithub.com/grpc/grpc-gopkg:golang/github.com/grpc/grpc-goOther threatsAffected
  • <1.79.3
Fixed in
  • 1.79.3

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 applying the OpenShift Virtualization v4.17 update after ensuring all previously released errata relevant to the system have been applied. This update contains the fixes for the referenced vulnerability. No additional mitigation steps are specified.

Description

This advisory concerns OpenShift Virtualization v4.17 images from Red Hat, which include updates fixing several bugs and adding enhancements. The advisory references CVE-2026-33186 but does not provide specific details about the vulnerability or its impact. No known exploits are reported in the wild. The advisory recommends applying the update after ensuring all previous errata are applied.

References

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