What is CVE-2026-26000?

CVE-2026-26000 is a medium-severity vulnerability in Xwiki, classified under Improper Restriction of Rendered UI Layers or Frames (Clickjacking). CVSS score: 6.1/10. Published 2026-02-12.

How severe is CVE-2026-26000?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Vulnerability in Xwiki

CVE-2026-26000

XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. Prior to 17.9.0, 17.4.6, and 16.10.13, it's possible using comments to inject CSS that would transform the full wiki in a link area le…

EPSS: 0.003 (19.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Xwiki
Xwiki Xwiki-platform — versions >= 17.5.0, < 17.9.0, >= 17.0.0-rc-1, < 17.4.6, < 16.10.13

Weakness classification (CWE)

CWE-1021 — Improper Restriction of Rendered UI Layers or Frames (Clickjacking)

References

security-advisories@github.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
security-advisories@github.com (Product, x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2026-26000?: CVE-2026-26000 is a medium-severity vulnerability in Xwiki, classified under Improper Restriction of Rendered UI Layers or Frames (Clickjacking). CVSS score: 6.1/10. Published 2026-02-12.
How severe is CVE-2026-26000?: Medium severity. CVSS v3 base score is 6.1 out of 10.