Red Hat Security Advisory: Red Hat build of MicroShift 4.16.63 security update
Affects Red HatSource GCVE Database
Not known to be exploited · CVSS 9.1 Critical : upgrade Red Hat grpc-go to 1.79.3 as a priority.
Data as of 29 Oct 2026, 22:32 UTC
- 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:NExploitation evidence
Disclosed: evidence found.
CVE published 20 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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 29 Oct 2026.
What to do
Upgrade grpc-go and github.com/grpc/grpc-go to 1.79.3.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| grpcgrpc-go | Affected
| Fixed in
|
Gogithub.com/grpc/grpc-gopkg:golang/github.com/grpc/grpc-goOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
Description
Red Hat build of MicroShift is Red Hat's light-weight Kubernetes orchestration solution designed for edge device deployments and is built from the edge capabilities of Red Hat OpenShift Container Platform. MicroShift is an application that is deployed on top of Red Hat Enterprise Linux devices at the edge, providing an efficient way to operate single-node clusters in these low-resource environments. This advisory contains the RPM packages for Red Hat build of MicroShift 4.16.63. Read the following advisory for the container images for this release: https://access.redhat.com/errata/RHSA-2026:20041 Security Fix(es): * google.golang.org/grpc/grpc-go: google.golang.org/grpc/authz: gRPC-Go: Authorization bypass due to improper HTTP/2 path validation (CVE-2026-33186) All Red Hat build of MicroShift 4.16 users are advised to use these updated