CVE-2026-53468 Typemill has Stored HTML Attribute Injection in Metadata Fields
Authenticated users can inject HTML attributes into metadata fields, potentially leading to stored cross-site scripting attacks.
- 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
- None listed
What is CVE-2026-53468?
CVE-2026-53468 is a medium-severity cross-site scripting vulnerability in typemill, published on 21 Aug 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
Typemill is a flat-file, Markdown-based content management system designed for informational documentation websites. Versions prior to 2.23.0 are vulnerable to stored HTML attribute injection in the page metadata fields (`og:title` and `og:description`). An authenticated user with permission to modify page metadata can inject arbitrary HTML attributes into generated `<meta>` tags due to missing output encoding. Under certain browser or DOM interaction scenarios, this may lead to stored cross-site scripting (XSS). Version 2.23.0 fixes the issue.
Weakness: CWE-79
Which versions are affected by CVE-2026-53468?
How do I fix CVE-2026-53468?
No fix has been published for CVE-2026-53468 yet. Limit exposure of the affected software until one is available.
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-2026-53468 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-53468 exists.
Sources
Also known as GHSA-wg6r-jwmr-p7gr.