CVE-2026-26000 XWiki Platform affected by click-jacking through CSS injection in comments
Attackers can inject CSS via comments to overlay the entire wiki with a malicious link, enabling click-jacking attacks against users.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-26000?
CVE-2026-26000 is a medium-severity cross-site scripting vulnerability in Xwiki Xwiki, published on 12 Feb 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-1021
Which versions are affected by CVE-2026-26000?
6 open source packages ship an affected version, including org.xwiki.platform:xwiki-platform-web. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.xwiki.platform:xwiki-platform-web Maven | All versions | 16.10.13 |
org.xwiki.platform:xwiki-platform-web Maven | All versions | 16.10.13 |
org.xwiki.platform:xwiki-platform-web Maven | From 17.0.0-rc-1 | 17.4.6 |
org.xwiki.platform:xwiki-platform-web Maven | From 17.0.0-rc-1 | 17.4.6 |
org.xwiki.platform:xwiki-platform-web Maven | From 17.5.0 | 17.9.0 |
org.xwiki.platform:xwiki-platform-web Maven | From 17.5.0 | 17.9.0 |
Products include Xwiki Xwiki.
How do I fix CVE-2026-26000?
Upgrade org.xwiki.platform:xwiki-platform-web to a fixed version for your release line: 16.10.13, 17.4.6 or 17.9.0.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-26000 being exploited?
There is no known exploitation of CVE-2026-26000 in the wild and no public exploit code.
Other vulnerabilities in Xwiki Xwiki
- CVE-2025-24893 XWiki Platform Eval Injection
- CVE-2025-53836 XWiki Rendering is vulnerable to RCE attacks when processing nested macros
- CVE-2024-55662 XWiki allows remote code execution through the extension sheet
- CVE-2024-55877 XWiki allows remote code execution from account through macro descriptions and XWiki.XWikiSyntaxMacrosList
- CVE-2024-37901 XWiki Platform vulnerable to remote code execution from account via SearchSuggestConfigSheet
Sources
Also known as GHSA-74rh-c5rh-88vg.