7.1

CVE-2026-93538: suse rancher Authentication Bypass by Spoofing

CVSS: 7.1v3.1HighAnalyzed
Published 28-09-2026Last modified 28-09-2026
Open JSON

Vulnerability summary

CVE-2026-93538 is a high (CVSS 7.1) Authentication Bypass by Spoofing vulnerability in suse rancher. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 6% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.17%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 28-09-2026
    PublishedVulnerability first disclosed.
  2. 28-09-2026
    Last modifiedVulnerability information updated.

Description

A cross-tenant authorization issue was discovered in SUSE Rancher Fleet. During agent-initiated cluster registration, cluster labels supplied by the registering agent, including labels in the reserved management.cattle.io/ namespace such as the cluster display name label, were applied to the resulting upstream Cluster object. Because Fleet resolves GitRepo and Bundle targets from those cluster labels, a party able to register a cluster into a Fleet workspace namespace shared with other tenants could cause its own cluster to satisfy targeting rules that administrators intended for a different cluster. This affects SUSE Rancher Fleet 0.16 before 0.16.1, 0.15 before 0.15.6, 0.14 before 0.14.10, 0.13 before 0.13.15, 0.12 before 0.12.19 and older versions.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

6%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

29-09-202619-10-2026
EPSS score
0.17%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Suse2 products
  • rancher≥ 0.16.0, < 0.16.1 | ≥ 0.15.0, < 0.15.6 | ≥ 0.14.0, < 0.14.10 | ≥ 0.13.0, < 0.13.15 | ≥ 0.12.0, < 0.12.19
  • rancher_fleet≥ 0.12.0, < 0.12.19 | ≥ 0.13.0, < 0.13.15 | ≥ 0.14.0, < 0.14.10 | ≥ 0.15.0, < 0.15.6 | ≥ 0.16.0, < 0.16.1

1 vendor · 2 products

References

1 links