Critical severity · published Sep 28, 2026
CVE-2026-88804
Unauthenticated update of public UI settings leading to stored cross-site scripting in Rancher
9.6
CVSS
0.4%
EPSS
No
On KEV
Description
An unauthenticated update of public UI settings could be used by remote attackers to execute a stored cross-site scripting attack in the Rancher UI, in SUSE Rancher 2.15 before 2.15.2, 2.14 before 2.14.6, 2.13 before 2.13.10, 2.12 before 2.12.14 and 2.11 before 2.11.18.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 29% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RA
Rancher · SUSE
2.15.0 before 2.15.2; 2.14.0 before 2.14.6; 2.13.0 before 2.13.10; 2.12.0 before 2.12.14; 2.11.0se before 2.11.18 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-88804
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-88804
vendor-advisory
https://github.com/rancher/rancher/security/advisories/GHSA-992f-xh8r-jg2f
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