CVE-2026-76654

NameCVE-2026-76654
DescriptionAn NTLM coercion vulnerability exists on Windows nodes when the subPath supplied in a pod's volumeMounts is set to a symbolic link that points to an attacker-controlled network share. When a kubelet resolves symlinks, it does not reject a target that resolves to a UNC path. As a result, the kubelet will transparently attempt to authenticate to the share using NTLM. This allows an attacker to obtain the NetNTLMv2 hash of the account under which the kubelet is running. An attacker could then attempt to crack the hash to retrieve the corresponding password or relay it to impersonate the node, if the node is domain-joined.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
kubernetes (PTS)bookworm1.20.5+really1.20.2-1.1+deb12u1fixed
trixie1.32.3+ds-2fixed
forky, sid1.36.4+ds-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
kubernetessource(unstable)(not affected)

Notes

- kubernetes <not-affected> (Windows-specific)
https://groups.google.com/g/kubernetes-announce/c/ZN4CNe2li2w

Search for package or bug name: Reporting problems