High severity · published Jun 30, 2026
CVE-2026-41053
Over-inclusive team membership expansion in GitHub App authentication provider for Rancher
8.8
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 44% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RA
Rancher · SUSE
2.14.0 before 2.14.2; 2.13.0 before 2.13.6 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-41053
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-41053
Patch
https://github.com/rancher/rancher/security/advisories/GHSA-4j6x-2764-m8gh
More from Rancher
9.9
CVE-2026-44935
Rancher Fleet vulnerable to cross namespace secret disclosure via unvalidated `valuesFrom` references in Helm Deployer
9.9
CVE-2026-41050
Helm impersonation bypass of `RESTClientGetter` retains `cluster-admin` during template rendering
9.9
CVE-2023-22651
Improper Privilege Management vulnerability in SUSE Rancher allows Privilege Escalation
9.9
CVE-2021-36783
A Insufficiently Protected Credentials vulnerability in SUSE Rancher allows authenticated Cluster Owners, Cluster Members, Project Owners and Project Members to read credentials,…
9.9
CVE-2021-36782
A Cleartext Storage of Sensitive Information vulnerability in SUSE Rancher allows authenticated Cluster Owners, Cluster Members, Project Owners, Project Members and User Base to…