Vulnerability · Published Jun 30, 2026 · Assigned by suse
CVE-2026-41053Over-inclusive team membership expansion in GitHub App authentication provider for Rancher
High 8.8
In plain English
A high-severity security flaw in Rancher from SUSE. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.5%top 55.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/rancher/rancher | 2.14.2 | GHSA-4j6x-2764-m8gh |
| Go | github.com/rancher/rancher | 2.13.6 | GHSA-4j6x-2764-m8gh |
| Go | github.com/rancher/rancher | 0.0.0-20260519172014-d0c047bbc6d2 | GHSA-4j6x-2764-m8gh |
| Go | github.com/rancher/rancher | 0.0.0-20260519172014-d0c047bbc6d2 | GO-2026-5869 |
Affected products (as reported)
Weakness: CWE-303 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H