CVE-2026-5389 - justhtml before 1.13.0 XSS via code fence breakout
Brief
CVE ID : CVE-2026-5389
Published : Aug. 23, 2026, 2:16 p. m.
- 6 hours, 54 minutes ago
Description : justhtml versions before 1.
- 0 contain a cross-site scripting vulnerability in the to_markdown() function when serializing attacker-controlled pre content. Attackers can place backticks inside sanitized pre elements to break out of fixed-length code fences, allowing raw HTML to execute when the generated Markdown is rendered by CommonMark or GFM-style renderers.
Severity: 6.1
- MEDIUM
Visit the link for more details, such as CVSS details, affected products, timeline, and more...