What’s Vulnerable › Vulnerabilities

CVE-2026-53468: Typemill has Stored HTML Attribute Injection in Metadata Fields

• Severity: medium (CVSS 4.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-21 · updated 2026-10-14
• Weakness: CWE-79

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.

Affected products

• typemill: before 2.23.0

References

• https://github.com/typemill/typemill/releases/tag/v2.23.0
• https://github.com/typemill/typemill/security/advisories/GHSA-wg6r-jwmr-p7gr
• https://github.com/typemill/typemill/security/advisories/GHSA-wg6r-jwmr-p7gr

Get alerted when CVE-2026-53468 or the next vulnerability affects your stack