Vulnerability · Published Aug 16, 2026 · Assigned by VulnCheck

CVE-2026-74786Scriban before 7.0.0 Denial of Service via Unbounded Template Output

Medium 6.5

In plain English

A medium-severity resource allocation without limits in scriban from scriban. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.5%top 58.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Scriban before 7.0.0 (affected versions <= 6.6.0) contains a denial-of-service vulnerability in which the LimitToString safety limit (default 1MB) can be bypassed because ObjectToString resets the per-call length counter (_currentToStringLength) on every top-level call and StringBuilderOutput enforces no cumulative output-size limit. An attacker who can supply a template can render a near-limit string repeatedly in a loop, allocating approximately 1GB of memory and causing an out-of-memory condition that crashes the host application.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
NuGet	scriban	7.0.0	GHSA-m2p3-hwv5-xpqw
NuGet	scriban.signed	7.0.0	GHSA-m2p3-hwv5-xpqw

Affected products (as reported)

Vendor	Product	Versions
scriban	scriban	0 – before 7.0.0

Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

GitHub Security Advisory (GHSA-m2p3-hwv5-xpqw) vendor-advisory
VulnCheck Advisory: Scriban before 7.0.0 Denial of Service via Unbounded Template Output third-party-advisory