CVE-2026-124439
Scriban before 7.5.3 Denial of Service via Uncatchable StackOverflowException
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| scriban scriban Scriban
nuget |
≥ 0; < 7.5.3 (affected, semver) 7.5.3 (unaffected, semver) Other versions: unaffected |
CNA: VulnCheck |
| scriban scriban Scriban.Signed
nuget |
≥ 0; < 7.5.3 (affected, semver) 7.5.3 (unaffected, semver) Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 8.7 high |
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | CNA: VulnCheck |
| 3.1 / 7.5 high |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CNA: VulnCheck |
| 4.0 / 8.7 high |
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD: [email protected] |
| 3.1 / 7.5 high |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD: [email protected] |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/scriban/scriban/security/advisories/GHSA-mvmw-9jxc-7pr2CNA: VulnCheck · vendor-advisory
- https://www.vulncheck.com/advisories/scriban-before-7.5.3-denial-of-service-via-uncatchable-stackoverflowexceptionCNA: VulnCheck · third-party-advisory
- https://github.com/scriban/scriban/security/advisories/GHSA-mvmw-9jxc-7pr2[email protected]
- https://www.vulncheck.com/advisories/scriban-before-7.5.3-denial-of-service-via-uncatchable-stackoverflowexception[email protected]
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