Vulnerability in Scriban
CVE-2026-124439
Scriban and Scriban.Signed before 7.5.3 contain uncontrolled recursion flaws in which postfix member, indexer, and call chains bypass ExpressionDepthLimit, array comparison lacks depth and cycle checks, and object.eval bypasses RecursiveLimit. Attackers who can supply templates can trigger an uncatchable StackOverflowException that terminates the host process.
Published .
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
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/scriban/scriban/security/advisories/GHSA-mvmw-9jxc-7pr2 (vendor-advisory)
- www.vulncheck.com/advisories/scriban-before-7.5.3-denial-of-service-via-uncatch… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-124439?
- CVE-2026-124439 is a high-severity vulnerability in Scriban, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2026-11-08.
- How severe is CVE-2026-124439?
- High severity. CVSS v3 base score is 7.5 out of 10.