CVE-2026-75035
Undergoing Analysis Undergoing Analysis - In Progress

Authentication Bypass in Rancher Manager via Token Metadata Exposure

Publication date: 2026-09-03

Last updated on: 2026-09-03

Assigner: SUSE

Description
A flaw was found in Rancher Manager. When a non-administrative caller supplied a label selector naming a different user, the ext.cattle.io/v1 Token store dropped its internal owner filter instead of returning an empty result. Any authenticated user could therefore list and watch every other user's tokens, disclosing token metadata and the stored salted hash of the bearer token. This issue affects Rancher: before 2.15.1.

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Meta Information

Published
2026-09-03
Last Modified
2026-09-03
Generated
2026-09-03
AI Q&A
2026-09-03
EPSS Evaluated
N/A
NVD
CVE-2026-75035
EUVD
EUVD-2026-70517

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
rancher rancher to 2.15.1 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-639 The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.

Attack-Flow Graph

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Executive Summary

This vulnerability is in Rancher Manager where a flaw allows non-administrative users to list and watch tokens belonging to other users by supplying a label selector for a different user. This exposes token metadata and hashed bearer tokens.

Detection Guidance

To detect this vulnerability, check Rancher Manager versions before 2.15.1. Verify if non-administrative users can list or access other users' tokens by inspecting API calls or logs for unauthorized token metadata exposure.

Impact Analysis

An attacker with access could view sensitive token information of other users, potentially leading to unauthorized access to resources or data if the tokens are compromised.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, violating confidentiality requirements in GDPR and HIPAA. It may result in non-compliance and potential legal consequences.

Mitigation Strategies

Upgrade Rancher Manager to version 2.15.1 or later immediately to patch the flaw. Review and revoke any potentially exposed tokens as a precautionary measure.

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