Rancher Webhook Handler Vulnerability in FleetWorkspace Products by Rancher
CVE-2026-44949

7HIGH

Key Information:

Vendor

Suse
Status
Rancher
Vendor
CVE Published:
30 June 2026

What is CVE-2026-44949?

A vulnerability in the Rancher FleetWorkspace's webhook handler allows unauthenticated attackers with network access to exploit the admission path. By submitting a crafted admission payload, attackers can manipulate workspace-related Kubernetes objects, creating them with unauthorized identity data. This could lead to various malicious activities, potentially compromising the integrity of the affected Kubernetes environment.

Affected Version(s)

Rancher 0.7.0 < 0.7.10

Rancher 0.8.0 < 0.8.7

Rancher 0.9.0 < 0.9.6

References

https://github.com/rancher/webhook/security/advisories/GH...
vendor-advisory

CVSS V4

Score:
7
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.