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VulnerabilityPublished

CVE-2026-104615: SUSE Rancher · Authentication Bypass by Spoofing

Affects SUSE RancherSource CVE Database V5

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Not known to be exploited · CVSS 7.9 High · fixed in 0.16.3 : patch SUSE Rancher soon.

Data as of 30 Oct 2026, 16:18 UTC

CVSS 3.1 base score
7.9High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (suse)CVSS 3.17.9
Patch
Available – fixed in 0.16.3, 0.15.17, 0.14.12 +1
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 30 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade Rancher and Fleett to 0.16.3, 0.15.17, 0.14.12 or 0.13.17.

Affected software

ProductAffectedFixed in
RancherFleettAffected
  • >=0.16.0 <0.16.3
  • >=0.15.0. <0.15.17
  • >=0.14.0 <0.14.12
  • >=0.13 <0.13.17
  • <=0.12
Fixed in
  • 0.16.3
  • 0.15.17
  • 0.14.12
  • 0.13.17
GitHubFleettpkg:github/FleettOther threatsAffected
  • >=0.16.0 <0.16.3
  • >=0.15.0. <0.15.17
  • >=0.14.0 <0.14.12
  • >=0.13 <0.13.17
  • <=0.12
Fixed in
  • 0.16.3
  • 0.15.17
  • 0.14.12
  • 0.13.17

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Fixed versions are available: 0.16.3, 0.15.17, 0.14.12, and 0.13.17. Users should upgrade to these versions or later to remediate the vulnerability. No information indicates alternative mitigations or that no action is required.

Description

CVE-2026-104615 is an authentication bypass vulnerability in SUSE Rancher Fleet's cluster registration flow affecting multiple versions before fixed releases. The flaw allows a registration request to claim a cluster identity without proper binding to the registration token, enabling association with a different managed cluster's identity. This could lead to unauthorized actions on clusters.

References

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