Security Advisories and CVEs
Rancher is committed to informing the community of security issues in our products. Rancher will publish security advisories and CVEs (Common Vulnerabilities and Exposures) for issues we have resolved. New security advisories are also published in Rancher’s GitHub security page.
| ID | Description | Date | Resolution |
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A high severity vulnerability was discovered in Rancher’s agents that under very specific circumstances allows a malicious actor to take over existing Rancher nodes. The attacker needs to have control of an expired domain or execute a DNS spoofing/hijacking attack against the domain in order to exploit this vulnerability. The targeted domain is the one used as the Rancher URL (the |
19 Sep 2024 |
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An issue was discovered in Rancher versions up to and including 2.7.13 and 2.8.4, where custom secrets encryption configurations are stored in plaintext under the clusters |
17 Jun 2024 |
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An issue was discovered in Rancher versions up to and including 2.7.13 and 2.8.4, where the webhook rule resolver ignores rules from a |
17 Jun 2024 |
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An issue was discovered in Rancher versions up to and including 2.7.13 and 2.8.4, where Rancher did not have a user retention process for when external authentication providers are used, that could be configured to run periodically and disable and/or delete inactive users. The new user retention process added in Rancher v2.8.5 and Rancher v2.7.14 is disabled by default. If enabled, a user becomes subject to the retention process if they don’t log in for a configurable period of time. It’s possible to set overrides for user accounts that are primarily intended for programmatic access (e.g. CI, scripts, etc.) so that they don’t become subject to the retention process for a longer period of time or at all. |
17 Jun 2024 |
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An issue was discovered in Rancher versions up to and including 2.7.13 and 2.8.4, in which supported RKE versions store credentials inside a ConfigMap that can be accessible by non-administrative users in Rancher. This vulnerability only affects an RKE-provisioned cluster. |
17 Jun 2024 |
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An issue was discovered in Rancher versions up to and including 2.6.13, 2.7.9 and 2.8.1, where multiple Cross-Site Scripting (XSS) vulnerabilities can be exploited via the Rancher UI (Norman). |
8 Feb 2024 |
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An issue was discovered in Rancher versions up to and including 2.6.13, 2.7.9 and 2.8.1, where multiple Cross-Site Scripting (XSS) vulnerabilities can be exploited via the Rancher UI (Apiserver). |
8 Feb 2024 |
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An issue was discovered in Rancher versions up to and including 2.6.13, 2.7.9 and 2.8.1, in which sensitive data may be leaked into Rancher’s audit logs. |
8 Feb 2024 |
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An issue was discovered in Rancher versions up to and including 2.6.13, 2.7.9 and 2.8.1, where granting a |
8 Feb 2024 |
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An issue was discovered in Rancher versions up to and including 2.6.12 and 2.7.3, in which permission changes in Azure AD are not reflected to users until they logout and log back into the Rancher UI. |
31 May 2023 |
Rancher v2.7.4 |
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An issue was discovered in Rancher versions up to and including 2.6.12 and 2.7.3, where multiple Cross-Site Scripting (XSS) vulnerabilities can be exploited via the Rancher UI. |
31 May 2023 |
Rancher v2.7.4 |
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An issue was discovered in Rancher versions up to and including 2.6.12 and 2.7.3, in which users with update privileges on a namespace, can move that namespace into a project they don’t have access to. |
31 May 2023 |
Rancher v2.7.4 |
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An issue was discovered in Rancher versions up to and including 2.6.12 and 2.7.3, where Standard users or above are able to elevate their permissions to Administrator in the local cluster. |
31 May 2023 |
Rancher v2.7.4 |
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The Rancher admissions webhook may become misconfigured due to a failure in the webhook’s update logic. The admissions webhook enforces validation rules and security checks before resources are admitted into the Kubernetes cluster. When the webhook is operating in a degraded state, it no longer validates any resources, which can result in severe privilege escalations and data corruption. |
24 April 2023 |
Rancher v2.7.3 |
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An issue was discovered in Rancher from versions 2.5.0 up to and including 2.5.16, 2.6.0 up to and including 2.6.9 and 2.7.0, where a command injection vulnerability is present in the Rancher Git package. This package uses the underlying Git binary available in the Rancher container image to execute Git operations. Specially crafted commands, when not properly disambiguated, can cause confusion when executed through Git, resulting in command injection in the underlying Rancher host. |
24 January 2023 |
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This issue affects Rancher versions from 2.5.0 up to and including 2.5.16, from 2.6.0 up to and including 2.6.9 and 2.7.0. It was discovered that the security advisory CVE-2021-36782, previously released by Rancher, missed addressing some sensitive fields, secret tokens, encryption keys, and SSH keys that were still being stored in plaintext directly on Kubernetes objects like |
24 January 2023 |
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An issue was discovered in Rancher versions up to and including 2.6.9 and 2.7.0, where the |
24 January 2023 |
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An issue was discovered in Rancher versions up to and including 2.5.16, 2.6.9 and 2.7.0, where an authorization logic flaw allows an authenticated user on any downstream cluster to (1) open a shell pod in the Rancher |
24 January 2023 |
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This issue affects Rancher versions from 2.5.0 up to and including 2.5.16, from 2.6.0 up to and including 2.6.9 and 2.7.0. It only affects Rancher setups that have an external authentication provider configured or had one configured in the past. It was discovered that when an external authentication provider is configured in Rancher and then disabled, the Rancher generated tokens associated with users who had access granted through the now disabled auth provider are not revoked. |
24 January 2023 |
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An issue was discovered in Rancher versions up to and including 2.5.15 and 2.6.6 where a flaw with authorization logic allows privilege escalation in downstream clusters through cluster role template binding (CRTB) and project role template binding (PRTB). The vulnerability can be exploited by any user who has permissions to create/edit CRTB or PRTB (such as |
18 August 2022 |
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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 |
18 August 2022 |
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An issue was discovered in Rancher versions up to and including 2.5.15 and 2.6.6 where sensitive fields like passwords, API keys, and Rancher’s service account token (used to provision clusters) were stored in plaintext directly on Kubernetes objects like |
18 August 2022 |
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This vulnerability only affects customers using Weave Container Network Interface (CNI) when configured through RKE templates. A vulnerability was discovered in Rancher versions 2.5.0 up to and including 2.5.13, and 2.6.0 up to and including 2.6.4, where a user interface (UI) issue with RKE templates does not include a value for the Weave password when Weave is chosen as the CNI. If a cluster is created based on the mentioned template, and Weave is configured as the CNI, no password will be created for network encryption in Weave; therefore, network traffic in the cluster will be sent unencrypted. |
24 May 2022 |
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A vulnerability was discovered in Rancher versions from 2.5.0 up to and including 2.5.12 and from 2.6.0 up to and including 2.6.3 which allows users who have create or update permissions on Global Roles to escalate their permissions, or those of another user, to admin-level permissions. Global Roles grant users Rancher-wide permissions, such as the ability to create clusters. In the identified versions of Rancher, when users are given permission to edit or create Global Roles, they are not restricted to only granting permissions which they already posses. This vulnerability affects customers who utilize non-admin users that are able to create or edit Global Roles. The most common use case for this scenario is the |
14 Apr 2022 |
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This vulnerability only affects customers using the |
14 Apr 2022 |
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This vulnerability only affects customers using Continuous Delivery with Fleet for continuous delivery with authenticated Git and/or Helm repositories. An issue was discovered in |
14 Apr 2022 |
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A vulnerability was discovered in Rancher versions from 2.5.0 up to and including 2.5.11 and from 2.6.0 up to and including 2.6.2, where an insufficient check of the same-origin policy when downloading Helm charts from a configured private repository can lead to exposure of the repository credentials to a third-party provider. This issue only happens when the user configures access credentials to a private repository in Rancher inside |
14 Apr 2022 |
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A vulnerability was discovered in versions of Rancher starting 2.0 up to and including 2.6.3. The |
31 Mar 2022 |
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A vulnerability was discovered in Rancher versions up to and including 2.4.17, 2.5.11 and 2.6.2. After removing a |
31 Mar 2022 |
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A vulnerability was discovered in Rancher versions starting 2.5.0 up to and including 2.5.9, that allowed an authenticated user to impersonate any user on a cluster through an API proxy, without requiring knowledge of the impersonated user’s credentials. This was due to the API proxy not dropping the impersonation header before sending the request to the Kubernetes API. A malicious user with authenticated access to Rancher could use this to impersonate another user with administrator access in Rancher, thereby gaining administrator level access to the cluster. |
31 Mar 2022 |
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A vulnerability was discovered in Rancher versions 2.0 through the aforementioned fixed versions, where users were granted access to resources regardless of the resource’s API group. For example, Rancher should have allowed users access to |
14 Jul 2021 |
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A vulnerability was discovered in Rancher 2.0.0 through the aforementioned patched versions, where a malicious Rancher user could craft an API request directed at the proxy for the Kubernetes API of a managed cluster to gain access to information they do not have access to. This is done by passing the "Impersonate-User" or "Impersonate-Group" header in the Connection header, which is then correctly removed by the proxy. At this point, instead of impersonating the user and their permissions, the request will act as if it was from the Rancher management server and incorrectly return the information. The vulnerability is limited to valid Rancher users with some level of permissions on the cluster. There is not a direct mitigation besides upgrading to the patched Rancher versions. |
14 Jul 2021 |
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A vulnerability was discovered in Rancher 2.2.0 through the aforementioned patched versions, where cloud credentials weren’t being properly validated through the Rancher API. Specifically through a proxy designed to communicate with cloud providers. Any Rancher user that was logged-in and aware of a cloud-credential ID that was valid for a given cloud provider, could call that cloud provider’s API through the proxy API, and the cloud-credential would be attached. The exploit is limited to valid Rancher users. There is not a direct mitigation outside of upgrading to the patched Rancher versions. |
14 Jul 2021 |
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A security vulnerability was discovered on all Rancher 2 versions. When accessing the Rancher API with a browser, the URL was not properly escaped, making it vulnerable to an XSS attack. Specially crafted URLs to these API endpoints could include JavaScript which would be embedded in the page and execute in a browser. There is no direct mitigation. Avoid clicking on untrusted links to your Rancher server. |
2 Mar 2021 |
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This vulnerability allows authenticated users to potentially extract otherwise private data out of IPs reachable from system service containers used by Rancher. This can include but not only limited to services such as cloud provider metadata services. Although Rancher allow users to configure whitelisted domains for system service access, this flaw can still be exploited by a carefully crafted HTTP request. The issue was found and reported by Matt Belisle and Alex Stevenson at Workiva. |
5 Aug 2019 |
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The vulnerability allows a member of a project that has access to edit role bindings to be able to assign themselves or others a cluster level role granting them administrator access to that cluster. The issue was found and reported by Michal Lipinski at Nokia. |
5 Aug 2019 |
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The vulnerability is known as a Cross-Site Websocket Hijacking attack. This attack allows an exploiter to gain access to clusters managed by Rancher with the roles/permissions of a victim. It requires that a victim to be logged into a Rancher server and then access a third-party site hosted by the exploiter. Once that is accomplished, the exploiter is able to execute commands against the Kubernetes API with the permissions and identity of the victim. Reported by Matt Belisle and Alex Stevenson from Workiva. |
15 Jul 2019 |
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Project owners can inject extra fluentd logging configurations that makes it possible to read files or execute arbitrary commands inside the fluentd container. Reported by Tyler Welton from Untamed Theory. |
5 Jun 2019 |
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Nodes using the built-in node drivers using a file path option allows the machine to read arbitrary files including sensitive ones from inside the Rancher server container. |
5 Jun 2019 |
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The default admin, that is shipped with Rancher, will be re-created upon restart of Rancher despite being explicitly deleted. |
16 Apr 2019 |
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Project members continue to get access to namespaces from projects that they were removed from if they were added to more than one project. |
29 Jan 2019 |
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Any project member with access to the |
29 Jan 2019 |
Rancher v2.1.6 and Rancher v2.0.11 - Rolling back from these versions or greater have specific instructions. |