CVE-2026-44949

Severity CVSS v4.0:

HIGH

Type:

CWE-306 Missing Authentication for Critical Function

Publication date:

30/06/2026

Last modified:

02/07/2026

Description

A Rancher FleetWorkspace admission path allowed side effects to occur in<br /> 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<br /> the in-cluster rancher-webhook service<br /> could submit a crafted admission payload and cause workspace-related <br /> Kubernetes objects to be created with attacker-chosen identity data.

Impact

Vector 4.0

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N CVSS v4.0 Severity and Metrics:

Base Score: 7.00 HIGH
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Attack Requirements (AT): Present
Privileges Required (PR): Low
User Interaction (UI): None
Confidentiality (VC): None
Integrity (VI): High
Availability (VA): None
Confidentiality (SC): None
Integrity (SI): High
Availability (SA): None

Base Score 4.0

7.00

Severity 4.0

HIGH

References to Advisories, Solutions, and Tools

https://github.com/rancher/webhook/security/advisories/GHSA-h83p-cq95-vph4