Rancher fixes a high-severity vulnerability

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[TLP:CLEAR] Rancher fixes a high-severity vulnerability

Rancher fixes a high-severity vulnerability with versions 2.13.2, 2.12.6, 2.11.10 and 2.10.11 [1].

Rancher - TLS bypass, MITM (CVE-2025-67601)

CVSS 8.3 (High)

An unauthenticated remote attacker in a MITM position can disrupt the TLS handshake, spoof a CA certificate and gain unauthorized access to sensitive data such as Basic Auth headers. The vulnerability can only be exploited when the 'login' command is used with the --skip-verify flag without --cacert. If an immediate update to the fixed version is not possible, the risk can be temporarily mitigated by passing the CA certificates explicitly with the --cacert parameter on every call of the 'login' command [1].

The vulnerability is present in product:

Rancher; >=2.10.0, <2.10.11; >=2.11.0, <2.11.10; >=2.12.0, <2.12.6; >=2.13.0, <2.13.2;

CVSS: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

More information:

CVE-2025-67601 at cve.org, NVD
CWE-295: Improper Certificate Validation at cwe.mitre.org

The vulnerability was publicly disclosed 30. 1. 2026.

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[TLP:CLEAR] Rancher fixes a high-severity vulnerability

Rancher - TLS bypass, MITM (CVE-2025-67601)

CVSS 8.3 (High)

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