CVE-2026-26345 SPIP < 4.4.8 Cross-Site Scripting in Public Area
Authenticated users can inject malicious scripts via inadequate sanitization, allowing attackers to execute code and modify data in victim browsers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-26345?
CVE-2026-26345 is a high-severity cross-site scripting vulnerability in Spip Spip, published on 19 Feb 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
SPIP before 4.4.8 contains a stored cross-site scripting (XSS) vulnerability in the public area triggered in certain edge-case usage patterns. The echapper_html_suspect() function does not adequately sanitize user-controlled content, allowing authenticated users with content-editing privileges (e.g., author-level roles and above) to inject malicious scripts. The injected payload may be rendered across multiple pages within the framework and execute in the browser context of other users, including administrators. Successful exploitation can allow attackers to perform actions in the security context of the victim user, including unauthorized modification of application state. This vulnerability is not mitigated by the SPIP security screen.
Weakness: CWE-79
Which versions are affected by CVE-2026-26345?
It affects 1 product.
Products include Spip Spip.
How do I fix CVE-2026-26345?
Upgrade to a fixed version.
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-2026-26345 being exploited?
There is no known exploitation of CVE-2026-26345 in the wild and no public exploit code.
Other vulnerabilities in Spip Spip
Sources
Also known as DEBIAN-CVE-2026-26345, GHSA-7wc5-wjpj-2r5j, UBUNTU-CVE-2026-26345.