CVE-2026-74795: Scriban

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

Scriban before 6.6.0 contains an uncontrolled recursion vulnerability in its recursive-descent parser. The parser does not enforce a default expression depth limit (the ExpressionDepthLimit property in ParserOptions defaults to null/disabled), so an attacker who controls template input can supply a deeply nested template (e.g., thousands of nested parentheses or blocks) that exhausts thread stack space and raises a StackOverflowException. Because a StackOverflowException cannot be caught in .NET, this causes immediate, unrecoverable termination of the hosting process, resulting in a denial of service. Applications that process untrusted or user-supplied templates can be exploited remotely without authentication.

Affected products

• Scriban Scriban: before 6.6.0 (fixed in 6.6.0)

Published 2026-08-16. Last modified 2026-08-31.