High severity · published May 13, 2026
CVE-2026-25705
Rancher Extensions have arbitrary file access via path traversal
8.4
CVSS
0.4%
EPSS
No
On KEV
Description
A vulnerability has been identified in [Rancher's Extensions](https://ranchermanager.docs.rancher.com/integrations-in-rancher/rancher-extensions) where malicious code can be injected in Rancher through a path traversal in the `compressedEndpoint` field inside a `UIPlugin` deployment. A malicious UI extension could abuse that to: * Overwrite Rancher binaries or configuration to inject code.
* Write to /var/lib/rancher/ to tamper with cluster state.
* If hostPath volumes are mounted, write to the host node filesystem.
* Use this issue to chain with other attack vectors.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 31% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RA
rancher · SUSE
2.14.0 before 2.14.1; 2.13.0 before 2.13.5; 2.12.0 before 2.12.9; 2.10.11 before 2.11.13 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-25705
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-25705
bugzilla.suse.com
https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-25705
github.com
https://github.com/rancher/rancher/security/advisories/GHSA-5v3h-x4wf-5c35
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