CVE-2026-44939
Command injection through unsanitized YAML parameter in Rancher
Description
A command injection vulnerability in the Rancher Manager cluster before 2.14.2 import endpoint /v3/import/{token}_{clusterId}.yaml through unsanitized YAML parameters could allow remote attackers to break out of an image, and execute e.g. malicious containers.
INFO
Published Date :
June 19, 2026, 1:16 p.m.
Last Modified :
June 24, 2026, 5:17 a.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 4.0 | CRITICAL | 404e59f5-483d-4b8a-8e7a-e67604dd8afb | ||||
| CVSS 4.0 | CRITICAL | [email protected] |
Solution
- Update Rancher Manager to version 2.14.2 or later.
- Apply vendor-provided patches for the cluster import endpoint.
- Sanitize all YAML parameters processed by the import endpoint.
- Restrict access to the import endpoint.
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-2026-44939.
| URL | Resource |
|---|---|
| https://github.com/rancher/rancher/security/advisories/GHSA-mhc6-2gfq-xx62 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-44939 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-2026-44939
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-2026-44939 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-44939 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.
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CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 24, 2026
Action Type Old Value New Value Changed SSVC {'id': 'CVE-2026-44939', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-22T15:09:19.375855Z'} {'id': 'CVE-2026-44939', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-23T00:00:00+00:00'} -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 22, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-44939', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-22T15:09:19.375855Z'} -
New CVE Received by [email protected]
Jun. 19, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://github.com/rancher/rancher/', 'vendor': 'SUSE', 'product': 'Rancher', 'versions': [{'status': 'affected', 'version': '2.14.0', 'lessThan': '2.14.2', 'versionType': 'semver'}, {'status': 'affected', 'version': '2.13.0', 'lessThan': '2.13.6', 'versionType': 'semver'}, {'status': 'affected', 'version': '2.12.0', 'lessThan': '2.12.10', 'versionType': 'semver'}, {'status': 'affected', 'version': '2.11.0', 'lessThan': '2.11.14', 'versionType': 'semver'}, {'status': 'affected', 'version': '2.10.0', 'lessThan': '2.10.12', 'versionType': 'semver'}], 'packageName': 'Rancher', 'defaultStatus': 'unaffected'}] Added Description A command injection vulnerability in the Rancher Manager cluster before 2.14.2 import endpoint /v3/import/{token}_{clusterId}.yaml through unsanitized YAML parameters could allow remote attackers to break out of an image, and execute e.g. malicious containers. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-95 Added Reference https://github.com/rancher/rancher/security/advisories/GHSA-mhc6-2gfq-xx62