CVE-2026-93538Network attack vectorHinoki check available

Cross-tenant Secret disclosure via spoofed registration labels

Published Sep 28, 2026 · Updated Sep 28, 2026

Cross-tenant disclosure in SUSE Rancher Fleet allows remote authenticated users to read other tenants' bundle manifests and resolved values Secrets. During agent-initiated registration, Fleet copies agent-supplied reserved management.cattle.io/ labels to the upstream Cluster object and uses those labels to select GitRepo and Bundle targets. Exposure requires a shared Fleet workspace, label-based or name-based targeting, and registration-label copying; default Rancher registration does not meet that gate.

CVSS severity7.1
High
EPSS probability0.17%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Cross-tenant disclosure in SUSE Rancher Fleet allows remote authenticated users to read other tenants' bundle manifests and resolved values Secrets. During agent-initiated registration, Fleet copies agent-supplied reserved management.cattle.io/ labels to the upstream Cluster object and uses those labels to select GitRepo and Bundle targets. Exposure requires a shared Fleet workspace, label-based or name-based targeting, and registration-label copying; default Rancher registration does not meet that gate.

The record

CVE
CVE-2026-93538
Published
Sep 28, 2026
Updated
Sep 28, 2026
Vendor
SUSE
Product
Rancher
Classifications
CWE-290, CWE-639, CWE-863
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.12.0 <0.12.19
  2. Affected versionversion=0.13.0 <0.13.15
  3. Affected versionversion=0.14.0 <0.14.10
  4. Affected versionversion=0.15.0 <0.15.6
  5. Affected versionversion=0.16.0 <0.16.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

SUSE · Rancherversion=0.12.0 <0.12.19; version=0.13.0 <0.13.15; version=0.14.0 <0.14.10; version=0.15.0 <0.15.6; version=0.16.0 <0.16.1

Published CVSS scores

7.1SUSE Rancher Fleet GitHub Security AdvisoryCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-290Authentication Bypass by Spoofing
CWE-639Authorization Bypass Through User-Controlled Key
CWE-863Incorrect Authorization

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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