Access Restriction Bypass in kube-apiserver

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

• CISA KEV Not listed.
• EPSS 0.054, the 92nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

1. 31 Oct 2026, 14:44 UTC First seen by agentprime
2. 31 Oct 2026, 14:44 UTC Confirmed by OSV

Sources

• GitHub Advisory Database: GHSA-g42g-737j-qx6j
• OSV: GHSA-g42g-737j-qx6j
• nvd.nist.gov/vuln/detail/CVE-2021-25735
• github.com/kubernetes/kubernetes/issues/100096
• github.com/kubernetes/kubernetes/pull/99946
• github.com/kubernetes/kubernetes/commit/00e81db174ef7aca497be5f42d87e46d14df2a90
• bugzilla.redhat.com/show_bug.cgi?id=1937562
• github.com/kubernetes/kubernetes
• groups.google.com/g/kubernetes-security-announce/c/FKAGqT4jx9Y
• pkg.go.dev/k8s.io/[email protected]/cmd/kube-apiserver
• sysdig.com/blog/cve-2021-25735-kubernetes-admission-bypass

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.