Is CVE-2026-26000 actively exploited?

CVE-2026-26000 has no public evidence of in-the-wild exploitation as of 2026-02-19.

What is the CVSS score for CVE-2026-26000?

CVE-2026-26000 has a CVSS score of 5.3 (MEDIUM severity). Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/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.

How do I patch CVE-2026-26000?

Patch guidance is available from xwiki security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-26000.

Which products are affected by CVE-2026-26000?

3 products: xwiki xwiki, xwiki xwiki, xwiki xwiki.

CVE-2026-26000 - remediation guidance & executive summary

Description

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 leading to a malicious page. This vulnerability is fixed in 17.9.0, 17.4.6, and 16.10.13.

CVSS Metrics

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/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
Attack Vector: network
Complexity: low
Privileges: none
User Action: passive
Confidentiality: undefined
Integrity: undefined
Availability: undefined
Weaknesses: CWE-1021

Metadata

Primary Vendor: XWIKI
Published: 2/12/2026
Last Modified: 2/19/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2026-26000

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary