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CVE-2026-75035— Rancher: ext.cattle.io/v1 Token store: cross-user token disclosure via label-selector scoping bypass

Quick assessment

Affected
SUSE Rancher
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Rancher Manager 中发现了一个缺陷：当非管理员调用方提供一个指向其他用户的标签选择器时， Token 存储层会丢弃其内部的 owner 过滤器，而不是返回空结果。因此，任何已认证用户都可以列出并监视其他所有用户的 Token，从而泄露 Token 的元数据以及存储的加盐哈希值（bearer token 的加盐哈希）。 此问题影响以下版本的 Rancher：2.15.1 之前。

CVSS 7.7 · High

Affected Version Matrix 1

VendorProduct Version RangeStatus
SUSE Rancher < 2.15.1 affected
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I. Basic Information for CVE-2026-75035

Vulnerability Information
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Vulnerability Title
Rancher: ext.cattle.io/v1 Token store: cross-user token disclosure via label-selector scoping bypass
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
SUSE Rancher 0 ~ 2.15.1 -

II. Public POCs for CVE-2026-75035

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III. Intelligence Information for CVE-2026-75035

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Vendor Pages for CVE-2026-75035 (1)

Same Patch Batch · SUSE · 2026-09-03 · 6 CVEs total

CVE-2026-71404 8.7 HIGH Rancher: Ownership-less ClusterRole overwrite via attacker-controlled cr-name annotation o
CVE-2026-75033 7.7 HIGH Rancher: Cross-Cluster Secret Leakage via Namespace projectId Annotation Spoofing
CVE-2026-75034 7.4 HIGH Rancher: SAML Assertion Replay
CVE-2026-71403 6.1 MEDIUM Rancher: Identity-field mutation in /v3/users allows account hijack via principal rebind
CVE-2026-75036 5.3 MEDIUM Fleet: DNS exfiltration via Sprig getHostByName in fleet.yaml Helm template preprocessing

IV. Related Vulnerabilities

Same product: Rancher
Same vendor: SUSE
Same weakness: CWE-639

V. Comments for CVE-2026-75035

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