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CVE-2026-44949: Unauthenticated namespace creation and RBAC injection via rancher-webhook FleetWorkspace mutating webhook

Undergoing analysis
Published 30-06-2026Last modified 30-06-2026

Vulnerability summary

CVE-2026-44949 is a high (CVSS 7.0) vulnerability in suse rancher. EPSS estimates a 0.39% chance of exploitation in the next 30 days, higher than 32.3% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.0/10
010
High · v4.0 (CVE.org)
EPSS score
0.39%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 30-06-2026
    PublishedVulnerability first disclosed.
  2. 30-06-2026
    Last modifiedVulnerability information updated.

Description

A Rancher FleetWorkspace admission path allowed side effects to occur in the Rancher webhook handler for versions 0.7.0 up to 0.7.10, 0.8.0 up to 0.8.7, 0.9.0 up to 0.9.6 and 0.10.0 up to 0.10.7. An unauthenticated attacker with network access to the in-cluster rancher-webhook service could submit a crafted admission payload and cause workspace-related Kubernetes objects to be created with attacker-chosen identity data.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.39%

Chance of exploitation in the next 30 days

Percentile

32%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.39% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Suse1 product
  • rancher≥ 0.7.0, < 0.7.10 | ≥ 0.8.0, < 0.8.7 | ≥ 0.9.0, < 0.9.6 | ≥ 0.10.0, < 0.10.7

1 vendor · 1 product

References

1 links