Rancher

Cleartext registration token exposure in Rancher allows a low-privileged user to obtain perpetually valid cluster join tokens and enlist rogue nodes into downstream Kubernetes clusters. The tokens - used to authenticate nodes and agents during cluster bootstrapping - are stored without encryption or expiration and are reachable through at least four distinct channels: the Rancher API, etcd, stored automation artifacts, and direct filesystem access on enrolled nodes. The CVSS scope-change flag (S:C) accurately reflects that successful exploitation extends attacker influence beyond the Rancher management plane into downstream cluster workloads, secrets, and compute. No public exploit has been identified at time of analysis, and no CISA KEV listing exists.

Cluster ID enumeration in SUSE Rancher exposes a reliable oracle via the unauthenticated `/v3/import/{token}_{clusterId}.yaml` endpoint, which performs cluster object retrieval before token validation. Remote unauthenticated attackers can distinguish valid cluster IDs (HTTP 502, triggered by a nil pointer dereference in `pkg/systemtemplate/private_registry.go` when private registry secrets exist) from non-existent ones (HTTP 200), leaking the presence and private-registry configuration status of clusters. This is not listed in CISA KEV and no public exploit code has been identified, but the zero-prerequisite network accessibility makes enumeration trivially scriptable.

Unbounded memory allocation in Rancher Manager's API audit logging middleware enables unauthenticated remote attackers to crash the Rancher management plane via memory exhaustion. When API audit logging is enabled, the audit copyReqBody middleware - positioned ahead of Rancher's APIBodyLimitingHandler in the handler chain - reads entire HTTP request bodies into memory on public login endpoints with no size cap, bypassing the default 1 MiB limit. An attacker sending a small number of concurrent oversized requests to these endpoints can exhaust server memory and terminate the Rancher Manager process, rendering the Rancher API and UI unavailable and severing management control of all downstream Kubernetes clusters. No public exploit has been identified at time of analysis.

Denial of service in Rancher's dynamiclistener TLS library allows network-accessible attackers to exhaust certificate Subject Alternative Name capacity on both the Rancher server and cattle-cluster-agent components. By sending a large volume of TLS requests each presenting a distinct Server Name Indication (SNI) hostname, an attacker causes the dynamiclistener library to continuously append new SANs to the serving certificate until its size exceeds TLS handshake limits, breaking all TLS communication on the affected listener. No public exploit has been identified at time of analysis, and CISA KEV status is not confirmed; however, exploitation is straightforward given the low technical barrier.

Information disclosure in SUSE Rancher AI Agent 1.0 before 1.0.2 writes API keys and raw LLM response text (which may contain sensitive data) into logfiles when the DEBUG loglevel is enabled, letting a local attacker with access to those logs harvest credentials and confidential model output. Rated CVSS 4.0 base 7.0, the flaw requires local access and high privileges plus a non-default debug configuration. There is no public exploit identified at time of analysis and it is not listed in CISA KEV.

Path traversal in Rancher Fleet's ImageScan subsystem (CWE-23) allows authenticated remote attackers to escape intended directory boundaries and trigger denial of service across four active release branches (0.12.x through 0.15.x). The flaw appears to have been introduced in the 0.12.0 series and persisted undetected through at least sixteen subsequent patch releases, indicating the ImageScan component lacked adequate path sanitization for an extended period. No public exploit code or active exploitation has been identified; the CVSS 4.0 vector (PR:L) confirms exploitation requires authenticated access, materially limiting opportunistic attack surface.

Authentication bypass in SUSE Rancher's in-cluster admission webhook (rancher-webhook) lets a network-adjacent, unauthenticated attacker forge FleetWorkspace admission payloads so that workspace-related Kubernetes objects are created with attacker-chosen identity data. Affected releases span Rancher 0.7.0–0.7.10, 0.8.0–0.8.7, 0.9.0–0.9.6 and 0.10.0–0.10.7, with integrity impact but no direct confidentiality or availability loss. There is no public exploit identified at time of analysis and it is not listed in CISA KEV; the issue is documented in SUSE/Rancher advisory GHSA-h83p-cq95-vph4.

Privilege persistence in SUSE Rancher allows project users to retain Pod Security Admission (PSA) permissions even after an administrator revokes those permissions from a RoleTemplate, due to a missing cleanup step in the legacy Project Role Template Binding (PRTB) reconciler. Affected versions are Rancher 2.13.0 through 2.13.7 and 2.14.0 through 2.14.3. An attacker with a pre-existing role assignment can continue to bypass PSA policies enforced at the project level, defeating administrative intent and potentially deploying workloads that violate the cluster's security posture. No public exploit has been identified at time of analysis, and the flaw is not listed in CISA KEV.

SAML assertion replay in Rancher's Assertion Consumer Service (ACS) handler lets a person-in-the-middle who captures a victim's SAML response reuse that assertion to authenticate as the victim, because the handler never enforces one-time use. Rancher 2.14.0 through 2.14.2 are affected, and because Rancher governs downstream Kubernetes clusters, a successful replay can yield administrative control. No public exploit identified at time of analysis; the issue is not on the CISA KEV list, and the carried CVSS 4.0 base score is 9.5 driven largely by the scope/subsequent-system impact.

Privilege escalation in Rancher 2.13 (before 2.13.6) and 2.14 (before 2.14.2) lets any authenticated user gain principal access they should not hold, because the GitHub authentication provider incorrectly caches the result of team membership expansion. The flaw (CWE-303, CVSS 8.8) means a low-privileged GitHub-authenticated user can be granted access tied to other principals/teams, effectively bypassing intended authorization. No public exploit identified at time of analysis and it is not listed in CISA KEV.

Privilege escalation in SUSE Rancher (Kubernetes management platform) allows a user holding the Project Owner role to improperly escalate their privileges beyond their assigned project scope, per advisory GHSA-vx8h-4prv-g744. Affected releases are 2.14 before 2.14.2, 2.13 before 2.13.6, and 2.12 before 2.12.10. There is no public exploit identified at time of analysis, but the CVSS 4.0 base score of 9.4 and scope-changing impact mean a successful escalation can compromise cluster-wide confidentiality, integrity, and availability.

Command injection in Rancher Manager’s cluster import endpoint enables remote attackers to deploy malicious containers on downstream Kubernetes clusters using a crafted URL. The vulnerability affects Rancher versions 2.10.0–2.10.12, 2.11.0–2.11.14, 2.12.0–2.12.10, 2.13.0–2.13.6, and 2.14.0–2.14.2, and has a CVSS 4.0 score of 9.4. No active exploitation has been confirmed, and the EPSS exploitation probability is low at 1.11%, though a vendor-supplied patch is available.

A vulnerability has been identified within Rancher Manager, where using self-signed CA certificates and passing the -skip-verify flag to the Rancher CLI login command without also passing the -cacert flag results in the CLI attempting to fetch CA certificates stored in Rancher’s setting cacerts. [CVSS 8.3 HIGH]

A Improper Privilege Management vulnerability in SUSE Rancher causes permission changes in Azure AD not to be reflected to users while they are logged in the Rancher UI. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

An Improper Privilege Management vulnerability in SUSE Rancher allowed standard users to leverage their existing permissions to manipulate Kubernetes secrets in the local cluster, resulting in the. Rated high severity (CVSS 8.0), this vulnerability is low attack complexity. No vendor patch available.

Improper Privilege Management vulnerability in SUSE Rancher allows Privilege Escalation. Rated critical severity (CVSS 9.9), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

An Improper Authorization vulnerability in SUSE Rancher, allows any user who has permissions to create/edit cluster role template bindings or project role template bindings (such as cluster-owner,. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.

A Cleartext Transmission of Sensitive Information vulnerability in SUSE Rancher, Rancher allows attackers on the network to read and change network data due to missing encryption of data transmitted. Rated medium severity (CVSS 6.8), this vulnerability is remotely exploitable. Public exploit code available and no vendor patch available.

A Reliance on Untrusted Inputs in a Security Decision vulnerability in Rancher allows users in the cluster to act as others users in the cluster by forging the "Impersonate-User" or. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

A Improper Access Control vulnerability in Rancher, allows users in the cluster to make request to cloud providers by creating requests with the cloud-credential ID. Rated critical severity (CVSS 9.9), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

A Incorrect Permission Assignment for Critical Resource vulnerability in Rancher allows users in the cluster to modify resources they should not have access to. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

A Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Rancher allows remote attackers to execute JavaScript via malicious links. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Rancher 2 through 2.2.4 is vulnerable to a Cross-Site Websocket Hijacking attack that allows an exploiter to gain access to clusters managed by Rancher. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

An issue was discovered that affects the following versions of Rancher: v2.0.0 through v2.0.13, v2.1.0 through v2.1.8, and v2.2.0 through 2.2.1. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

A vulnerability exists in Rancher before 2.2.4 in the login component, where the errorMsg parameter can be tampered to display arbitrary content, filtering tags but not special characters or symbols. Rated medium severity (CVSS 4.7), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

In Rancher 2 through 2.2.3, Project owners can inject additional fluentd configuration to read files or execute arbitrary commands inside the fluentd container. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

In Rancher 1 and 2 through 2.2.3, unprivileged users (if allowed to deploy nodes) can gain admin access to the Rancher management plane because node driver options intentionally allow posting certain. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

In Rancher 2.0.0 through 2.1.5, project members have continued access to create, update, read, and delete namespaces in a project after they have been removed from it. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

Rancher Labs rancher server 1.2.0+ is vulnerable to authenticated users disabling access control via an API call. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity.