CVE-2026-41053
Over-inclusive team membership expansion in GitHub App authentication provider for Rancher
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.
INFO
Published Date :
June 30, 2026, 12:16 p.m.
Last Modified :
July 2, 2026, 7:57 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | 404e59f5-483d-4b8a-8e7a-e67604dd8afb | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update Rancher to version 2.13.6 or later.
- Update Rancher to version 2.14.2 or later.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-41053.
| URL | Resource |
|---|---|
| https://github.com/rancher/rancher/security/advisories/GHSA-4j6x-2764-m8gh | Patch Vendor Advisory Mitigation |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-41053 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-41053
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-41053 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-41053 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jul. 02, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:suse:rancher:*:*:*:*:*:*:*:* versions from (including) 2.13.0 up to (excluding) 2.13.6 *cpe:2.3:a:suse:rancher:*:*:*:*:*:*:*:* versions from (including) 2.14.0 up to (excluding) 2.14.2 Added Reference Type SUSE: https://github.com/rancher/rancher/security/advisories/GHSA-4j6x-2764-m8gh Types: Mitigation, Patch, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 01, 2026
Action Type Old Value New Value Changed SSVC {'id': 'CVE-2026-41053', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-30T12:08:45.633185Z'} {'id': 'CVE-2026-41053', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-30T00:00:00+00:00'} -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 30, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-41053', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-30T12:08:45.633185Z'} -
New CVE Received by [email protected]
Jun. 30, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://github.com/rancher/rancher/', 'vendor': 'SUSE', 'modules': ['github auth provider'], 'product': 'Rancher', 'versions': [{'status': 'affected', 'version': '2.14.0', 'lessThan': '2.14.2', 'versionType': 'semver'}, {'status': 'affected', 'version': '2.13.0', 'lessThan': '2.13.6', 'versionType': 'semver'}], 'packageName': 'Rancher', 'defaultStatus': 'unaffected'}] Added 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-303 Added Reference https://github.com/rancher/rancher/security/advisories/GHSA-4j6x-2764-m8gh