CVE-2026-44945
Cross-Cluster Impersonation Confused-Deputy Privilege Escalation
Description
A privilege escalation vulnerability exists in Rancher's impersonation middleware (pkg/auth/requests/impersonate.go). An authenticated Rancher user with the default user global role can gain full administrative access to the Rancher control plane and transitively to all downstream clusters it manages. This issue affects Rancher: from 2.11.0 before 2.11.16, from 2.12.0 before 2.12.12, from 2.13.0 before 2.13.8, and from 2.14.0 before 2.14.2.
INFO
Published Date :
Aug. 5, 2026, 10:17 a.m.
Last Modified :
Aug. 5, 2026, 2:17 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | 404e59f5-483d-4b8a-8e7a-e67604dd8afb | ||||
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 3.1 | CRITICAL | MITRE-CVE |
Solution
- Upgrade Rancher to a patched version.
- Apply security updates promptly.
- Review user role assignments.
- Restrict default global roles.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-44945.
| URL | Resource |
|---|---|
| https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-44945 | |
| https://github.com/rancher/rancher/pull/55983 | |
| https://github.com/rancher/rancher/security/advisories/GHSA-v584-7w32-jwpq |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-44945 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-44945
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-44945 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-44945 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 05, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-44945', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-05T13:07:55.384590Z'} -
New CVE Received by [email protected]
Aug. 05, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://github.com/rancher/rancher', 'vendor': 'SUSE', 'product': 'Rancher', 'versions': [{'status': 'affected', 'changes': [{'at': '2.11.16', 'status': 'unaffected'}], 'version': '2.11.0', 'lessThan': '2.11.16', 'versionType': 'semver'}, {'status': 'affected', 'changes': [{'at': '2.12.12', 'status': 'unaffected'}], 'version': '2.12.0', 'lessThan': '2.12.12', 'versionType': 'semver'}, {'status': 'affected', 'changes': [{'at': '2.13.8', 'status': 'unaffected'}], 'version': '2.13.0', 'lessThan': '2.13.8', 'versionType': 'semver'}, {'status': 'affected', 'changes': [{'at': '2.14.4', 'status': 'unaffected'}], 'version': '2.14.0', 'lessThan': '2.14.2', 'versionType': 'semver'}], 'packageName': 'Rancher', 'defaultStatus': 'unaffected'}] Added Description A privilege escalation vulnerability exists in Rancher's impersonation middleware (pkg/auth/requests/impersonate.go). An authenticated Rancher user with the default user global role can gain full administrative access to the Rancher control plane and transitively to all downstream clusters it manages. This issue affects Rancher: from 2.11.0 before 2.11.16, from 2.12.0 before 2.12.12, from 2.13.0 before 2.13.8, and from 2.14.0 before 2.14.2. Added CVSS V3.1 AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H Added CWE CWE-441 Added CWE CWE-497 Added Reference https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-44945 Added Reference https://github.com/rancher/rancher/pull/55983 Added Reference https://github.com/rancher/rancher/security/advisories/GHSA-v584-7w32-jwpq