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MEDIUM severity

CVE-2023-32199 — rancher

MEDIUMFix: rancher/rancher#52303

CVE-2023-32199 is a medium-severity (CVSS 4.3) CWE-281 vulnerability in github.com/rancher/rancher. A fix is available for github.com/rancher/rancher — see the affected versions and patch details below.

Rancher user retains access to clusters despite Global Role removal

Also known asGO-2025-4073
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 4, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2023-32199.

EPSS Exploitation Probability

via FIRST.org ↗
0.2%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs13th percentile — riskier than 13% of all scored CVEsHighest risk
0.00%0.24%0.48%0.72%0.0%0.2%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐹github.com/rancher/rancher

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

Description

Impact

A vulnerability has been identified within Rancher Manager, where after removing a custom GlobalRole that gives administrative access or the corresponding binding, the user still retains access to clusters. This only affects custom Global Roles that:

  • Have a * on * in * rule for resources
  • Have a * on * rule for non-resource URLs

For example

apiVersion: management.cattle.io/v3
kind: GlobalRole
metadata:
  name: custom-admin
rules:
  - apiGroups:
      - '*'
    resources:
      - '*'
    verbs:
      - '*'
  - nonResourceURLs:
      - '*'
    verbs:
      - '*'

Specifically:

  • When a user is bound to a custom admin GlobalRole, a corresponding ClusterRoleBinding is created on all clusters that binds them to the cluster-admin ClusterRole.
  • When such a GlobalRole or the GlobalRoleBinding (e.g., when the user is unassigned from this role in UI) is deleted, the ClusterRoleBinding that binds them to the cluster-admin ClusterRole stays behind.

This issue allows a user to continue having access to clusters after they have been unassigned from the custom admin global role or the role has been deleted.

Please consult the associated MITRE ATT&CK - Technique - Account Access Removal for further information about this category of attack.

Patches

This vulnerability is addressed by removing the corresponding ClusterRoleBindings whenever the admin GlobalRole or its GlobalRoleBindings are deleted. Previously orphaned ClusterRoleBindings are marked with the annotation authz.cluster.cattle.io/admin-globalrole-missing=true and should be deleted manually.

Orphaned ClusterRoleBindings can be listed with:

kubectl get clusterrolebinding -o jsonpath='{range .items[?(@.metadata.annotations.authz\.cluster\.cattle\.io/admin-globalrole-missing=="true")]}{.metadata.name}{"\n"}{end}'

Patched versions of Rancher include releases v2.12.3, v2.11.7.

Complications with the restricted admin functionality prevented the patches from being included in v2.10 and v2.9.

Workarounds

If the deployment can't be upgraded to a fixed version, users are advised to manually identify the orphaned ClusterRoleBindings and remove them.

References

If you have any questions or comments about this advisory:

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐹Gogithub.com/rancher/rancherall versions0.0.0-20251014212116-7faa74a968c2go get github.com/rancher/rancher@v0.0.0-20251014212116-7faa74a968c2

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/rancher/rancher, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update github.com/rancher/rancher to 0.0.0-20251014212116-7faa74a968c2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-32199 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

### Impact A vulnerability has been identified within Rancher Manager, where after removing a custom GlobalRole that gives administrative access or the corresponding binding, the user still retains access to clusters. This only affects custom Global Roles that: - Have a `*` on `*` in `*` rule for resources - Have a `*` on `*` rule for non-resource URLs For example ```yaml apiVersion: management.cattle.io/v3 kind: GlobalRole metadata: name: custom-admin rules: - apiGroups: - '*' resources: - '*' verbs: - '*' - nonResourceURLs: - '*' verbs: - '*'
O3 Security · Impact-Aware SCA

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CVE-2023-32199: rancher — Fix Available