GHSA-8w87-58w6-hfv8

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    GHSA-8w87-58w6-hfv8

    Published: 3 Mar 2026Last Modified: 8 Jul 2026

    Summary: Rancher doesn't properly sanitize credentials in cluster template answers

    Details: ### Impact It was discovered that in Rancher versions up to and including 2.5.12 and 2.6.3 there is a failure to properly sanitize credentials in cluster template answers. This failure can lead to plaintext storage and exposure of credentials, passwords and API tokens. The exposed credentials are visible in Rancher to authenticated `Cluster Owners`, `Cluster Members`, `Project Owners` and `Project Members` on the endpoints `/v1/management.cattle.io.clusters`, `/v3/clusters` and `/k8s/clusters/local/apis/management.cattle.io/v3/clusters`. Sensitive fields are now stripped from `Clusters` objects before the object is stored. For objects that existed before this security fix, a one-time migration happens on startup. **Important:** - It is highly advised to review for potential leaked credentials in this scenario, and to change them if deemed necessary. - The final impact severity for confidentiality, integrity and availability is dependent on the permissions that the leaked credentials have on their own services. ### Patches Patched versions include releases 2.5.13, 2.6.4 and later versions. ### Workarounds Limit access in Rancher to trusted users. There is not a direct mitigation besides upgrading to the patched Rancher versions. **Important:** It is highly advised to review for potential leaked credentials in this scenario, and to change them if deemed necessary. ### For more information If you have any questions or comments about this advisory: * Reach out to [SUSE Rancher Security team](https://github.com/rancher/rancher/security/policy) for security related inquiries. * Open an issue in [Rancher](https://github.com/rancher/rancher/issues/new/choose) repository. * Verify our [support matrix](https://www.suse.com/suse-rancher/support-matrix/all-supported-versions/) and [product support lifecycle](https://www.suse.com/lifecycle/).

    References: https://github.com/rancher/rancher/security/advisories/GHSA-8w87-58w6-hfv8, https://nvd.nist.gov/vuln/detail/CVE-2021-36783, https://bugzilla.suse.com/show_bug.cgi?id=1193990, https://github.com/rancher/rancher

    Affected packages

    Package

    Name: github.com/rancher/rancher

    Purl: pkg:golang/github.com/rancher/rancher

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 2.5.0
    Fixed -2.5.13

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    GHSA-8w87-58w6-hfv8 | CVE-DB