What is CVE-2026-41053?

CVE-2026-41053 is a high-severity vulnerability in SUSE Rancher, classified under Incorrect Implementation of Authentication Algorithm. CVSS score: 8.8/10. Published 2026-06-30.

How severe is CVE-2026-41053?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in SUSE Rancher

CVE-2026-41053

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.

Published 2026-06-30 · last modified 2026-07-02.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (42.2th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 42.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

SUSE Rancher — versions 2.14.0, 2.13.0

Weakness classification (CWE)

CWE-303 — Incorrect Implementation of Authentication Algorithm

References

github.com/rancher/rancher/security/advisories/GHSA-4j6x-2764-m8gh (vendor-advisory, Patch, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-41053?: CVE-2026-41053 is a high-severity vulnerability in SUSE Rancher, classified under Incorrect Implementation of Authentication Algorithm. CVSS score: 8.8/10. Published 2026-06-30.
How severe is CVE-2026-41053?: High severity. CVSS v3 base score is 8.8 out of 10.