CVE-2026-74789

Summary

Scriban before 7.0.0 (affected <= 6.6.0) applies its LoopLimit constraint only to script loop statements and not to expensive iteration performed inside built-in operators and functions. As a result, a single expression such as {{ 1..1000000 | array.size }} — or a memory-amplification expression such as {{ 'A' * 200000000 }} — can force large CPU or memory consumption even when LoopLimit is configured to a very small value, resulting in denial of service. Applications that render attacker-controlled templates and rely on LoopLimit for safe execution are affected.

Affected Software

Weaknesses

• CWE-400: Uncontrolled Resource Consumption

References

• https://github.com/scriban/scriban/security/advisories/GHSA-c875-h985-hvrc
• https://www.vulncheck.com/advisories/scriban-before-looplimit-bypass-via-built-in-operations

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