Scriban before 6.6.0 Denial of Service via Uncontrolled Recursion

Description

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.

Scores

EPSS (exploitation in 30 days)

0.57% · top 52% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: yes · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.7.

Weakness

• CWE-674: Uncontrolled Recursion (opens in a new tab)All about CWE-674 and its CVEs

Affected products

• scriban · scriban

  • affected < 6.6.0
  • unaffected 6.6.0

References (2)

• GitHub Security Advisory (GHSA-wgh7-7m3c-fx25) (opens in a new tab)vendor-advisory
• VulnCheck Advisory: Scriban before 6.6.0 Denial of Service via Uncontrolled Recursion (opens in a new tab)third-party-advisory

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-74795](https://trackcve.app/badge/CVE-2026-74795.svg)](https://trackcve.app/cve/CVE-2026-74795)

Record last updated 17 Aug 2026, 16:04 UTC.