Over-inclusive team membership expansion in GitHub App authentication provider for Rancher

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Summary

CVECVE-2026-41053
StatePUBLISHED
Assignersuse
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-30 12:16:23 UTC
Updated2026-07-02 19:57:44 UTC
DescriptionIncorrect 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.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.003700000 probability, percentile 0.289810000 (date 2026-07-04)

Problem Types: CWE-303 | CWE-303 CWE-303 Incorrect implementation of authentication algorithm

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNACVSS8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Suse Rancher All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA SUSE Rancher affected 2.14.0 2.14.2 semver Not specified
CNA SUSE Rancher affected 2.13.0 2.13.6 semver Not specified

References

ReferenceSourceLinkTags
github.com/rancher/rancher/security/advisories/GHSA-4j6x-2764-m8gh [email protected] github.com Patch, Vendor Advisory, Mitigation
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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