What is CVE-2026-88804?

CVE-2026-88804 is a critical-severity vulnerability in SUSE Rancher, classified under Cross-site Scripting. CVSS score: 9.6/10. Published 2026-09-28.

How severe is CVE-2026-88804?

Critical severity. CVSS v3 base score is 9.6 out of 10.

XSS in SUSE Rancher

CVE-2026-88804

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.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-09-28 · last modified 2026-09-28.

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

SUSE Rancher

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/rancher/rancher/security/advisories/GHSA-992f-xh8r-jg2f (vendor-advisory)

Frequently asked questions

What is CVE-2026-88804?: CVE-2026-88804 is a critical-severity vulnerability in SUSE Rancher, classified under Cross-site Scripting. CVSS score: 9.6/10. Published 2026-09-28.
How severe is CVE-2026-88804?: Critical severity. CVSS v3 base score is 9.6 out of 10.