CVE catalog
CVE-2026-76654
kubernetes: CVE-2026-76654
- Severity
- Medium · CVSS 5.8
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N - Published
- Source
- [NVD] · [CVE record]
A flaw was found in Kubernetes kubelet on Windows nodes. When kubelet resolves a volume subPath that is a symbolic link, it does not reject an ordinary UNC network path. Following that link causes Windows to authenticate to the remote share with NTLM, exposing the NetNTLMv2 hash of the kubelet account. That hash may be cracked or, if the node is domain-joined, used in an NTLM relay. kubelet: kubelet: Subpath symlinking on Windows nodes permits NTLM coercion Only Windows workers are in scope. WMCO is what ships and installs kubelet.exe on those nodes. The Linux kubelet used on control plane and RHCOS workers does not include the vulnerable Windows path. The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | kubernetes | sid | 1.36.4+ds-1 | not affected |
| Debian | kubernetes | forky | 1.36.4+ds-1 | not affected |
| Debian | kubernetes | trixie | 1.32.3+ds-2 | not affected |
| Debian | kubernetes | bookworm | 1.20.5+really1.20.2-1.1+deb12u1 | not affected |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | kubernetes | source | sid | Not affected | unimportant | Not reported | Not reported |
| Debian | kubernetes | source | forky | Not affected | unimportant | Not reported | Not reported |
| Debian | kubernetes | source | trixie | Not affected | unimportant | Not reported | Not reported |
| Debian | kubernetes | source | bookworm | Not affected | unimportant | Not reported | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [kubernetes-client]Not affected
Source package: [kubernetes]
Details (2)
1.20.5+really1.20.2-1.1+deb12u1· amd64 · bookwormNot affected
dsa · kubernetes · debian · bookworm
1.20.5+really1.20.2-1.1+deb12u1· arm64 · bookwormNot affected
dsa · kubernetes · debian · bookworm
Observed:
References
- [http://www.openwall.com/lists/oss-security/2026/09/23/36]
- [https://github.com/kubernetes/kubernetes/issues/142098]
- [https://groups.google.com/g/kubernetes-security-announce/c/Wkv04IFzW8g]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-76654]
- [https://security-tracker.debian.org/tracker/CVE-2026-76654]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-76654.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3544.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [National Vulnerability Database (NVD)] · [Red Hat security advisories and VEX]