Vulnerability in Scriban
CVE-2026-74783
Scriban versions 6.6.0 through 7.2.0 contain a non-enforcing ExpressionDepthLimit guard that fails to stop recursive descent parsing of deeply nested expressions. Attackers can supply templates with deeply nested parentheses, array initializers, object initializers, or unary operators to trigger an uncatchable StackOverflowException that immediately terminates the host process.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.005 (39.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 39.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002
Affected products
- Scriban — versions 0
Weakness classification (CWE)
References
- github.com/scriban/scriban/security/advisories/GHSA-6q7j-xr26-3h2c (vendor-advisory)
- www.vulncheck.com/advisories/scriban-through-parser-recursion-denial-of-service (third-party-advisory)
Frequently asked questions
- What is CVE-2026-74783?
- CVE-2026-74783 is a high-severity vulnerability in Scriban, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2026-08-16.
- How severe is CVE-2026-74783?
- High severity. CVSS v3 base score is 7.5 out of 10.