CVE-2026-41053 Over-inclusive team membership expansion in GitHub App authentication provider for Rancher

What is CVE-2026-41053?

CVE-2026-41053 is a high-severity authentication bypass vulnerability in SUSE Rancher, published on 30 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Incorrect authentication caching in the team member ship expansion of the Rancher Github authentication provider caused it granting principal access to any logged in user, in 2.13 before 2.13.6 and 2.14 before 2.14.2.

Weakness: CWE-303

Which versions are affected by CVE-2026-41053?

7 open source packages ship an affected version, including github.com/rancher/rancher. It affects 1 product.

Products include Suse Rancher.

How do I fix CVE-2026-41053?

Upgrade github.com/rancher/rancher to a fixed version for your release line: 0.0.0-20260519172014-d0c047bbc6d2, 2.13.6 or 2.14.2.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2026-41053 being exploited?

There is no known exploitation of CVE-2026-41053 in the wild and no public exploit code.

Other vulnerabilities in SUSE Rancher

• CVE-2023-22647 Rancher vulnerable to Privilege Escalation via manipulation of Secrets Critical 9.9
• CVE-2023-22651 Rancher Webhook is misconfigured during upgrade process Critical 9.9
• CVE-2022-43757 Rancher: Exposure of sensitive fields Critical 9.9
• CVE-2021-36782 Rancher: Plaintext storage and exposure of credentials in Rancher API and cluster.management.cattle.io object Critical 9.9
• CVE-2021-36783 Rancher: Failure to properly sanitize credentials in cluster template answers Critical 9.9

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-4j6x-2764-m8gh, GO-2026-5869.