CVE-2026-41053: CWE-303 Incorrect implementation of authentication algorithm in SUSE Rancher
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.
AI Analysis
Technical Summary
This vulnerability arises from an incorrect implementation of authentication caching in the Rancher GitHub authentication provider's team membership expansion logic. Specifically, Rancher versions 2.13.0 through 2.13.5 and 2.14.0 through 2.14.1 may grant principal access to any logged-in user due to this flaw. The issue is classified under CWE-303 (Incorrect Implementation of Authentication Algorithm). The CVSS v3.1 base score is 8.8, indicating a high severity with network attack vector, low attack complexity, requiring low privileges, no user interaction, and impacts on confidentiality, integrity, and availability.
Potential Impact
Exploitation of this vulnerability could allow an authenticated user with low privileges to gain unauthorized principal access within Rancher, potentially leading to full compromise of confidentiality, integrity, and availability of the affected system components. This elevates the risk of unauthorized access and control over Rancher-managed resources.
Mitigation Recommendations
No official patch or remediation level is currently stated in the available data. Patch status is not yet confirmed — check the SUSE vendor advisory for current remediation guidance. Until a fix is available, restrict access to Rancher instances to trusted users only and monitor for unusual authentication behavior related to GitHub authentication.
CVE-2026-41053: CWE-303 Incorrect implementation of authentication algorithm in SUSE 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.
CVSS v3.1
Score 8.8high
Affected software
pkg:github/RancherRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability arises from an incorrect implementation of authentication caching in the Rancher GitHub authentication provider's team membership expansion logic. Specifically, Rancher versions 2.13.0 through 2.13.5 and 2.14.0 through 2.14.1 may grant principal access to any logged-in user due to this flaw. The issue is classified under CWE-303 (Incorrect Implementation of Authentication Algorithm). The CVSS v3.1 base score is 8.8, indicating a high severity with network attack vector, low attack complexity, requiring low privileges, no user interaction, and impacts on confidentiality, integrity, and availability.
Potential Impact
Exploitation of this vulnerability could allow an authenticated user with low privileges to gain unauthorized principal access within Rancher, potentially leading to full compromise of confidentiality, integrity, and availability of the affected system components. This elevates the risk of unauthorized access and control over Rancher-managed resources.
Mitigation Recommendations
No official patch or remediation level is currently stated in the available data. Patch status is not yet confirmed — check the SUSE vendor advisory for current remediation guidance. Until a fix is available, restrict access to Rancher instances to trusted users only and monitor for unusual authentication behavior related to GitHub authentication.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- suse
- Date Reserved
- 2026-04-16T13:37:50.680Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a43addd27e9c79719af496c
Added to database: 06/30/2026, 11:51:57 UTC
Last enriched: 06/30/2026, 12:06:30 UTC
Last updated: 06/30/2026, 13:20:46 UTC
Views: 3
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