GHSA-p6q4-fgr8-vx4p

Suggest an improvement
Source
https://github.com/advisories/GHSA-p6q4-fgr8-vx4p
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-p6q4-fgr8-vx4p/GHSA-p6q4-fgr8-vx4p.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-p6q4-fgr8-vx4p
Published
2026-03-24T22:06:24Z
Modified
2026-03-24T22:35:41.759301Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
Scriban has a Stack Overflow via Nested Array Initializers That Bypass the ExpressionDepthLimit Fix
Details

Summary

StackOverflowException via nested array initializers bypasses ExpressionDepthLimit fix (GHSA-wgh7-7m3c-fx25)

Details

The recent fix for GHSA-wgh7-7m3c-fx25 (uncontrolled recursion in parser) added ExpressionDepthLimit defaulting to 250. However, deeply nested array initializers ([[[[...) recurse through ParseArrayInitializer → ParseExpression → ParseArrayInitializer, which is a different recursion path not covered by the expression depth counter.

This causes a StackOverflowException on current main (commit b5ac4bf - "Add limits for default safety").

PoC

using Scriban;

// ExpressionDepthLimit (default 250) does NOT prevent this crash
string nested = "{{ " + new string('[', 5000) + "1" + new string(']', 5000) + " }}";
Template.Parse(nested); // StackOverflowException - process terminates

Impact

Same as GHSA-wgh7-7m3c-fx25: High severity. StackOverflowException cannot be caught with try/catch in .NET - the process terminates immediately. Any application calling Template.Parse with untrusted input is vulnerable, even with the new default ExpressionDepthLimit enabled.

Database specific 
{
    "cwe_ids": [
        "CWE-674"
    ],
    "severity": "HIGH",
    "github_reviewed": true,
    "nvd_published_at": null,
    "github_reviewed_at": "2026-03-24T22:06:24Z"
}
References

Affected packages

NuGet / Scriban

Package

Name
Scriban
View open source insights on deps.dev
Purl
pkg:nuget/Scriban

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
7.0.0

Affected versions

0.*
0.1.0
0.2.0
0.2.1
0.2.2
0.3.0
0.3.1-pre028
0.3.1
0.4.0
0.5.0
0.6.0
0.7.0
0.9.0-pre100
0.9.0
0.9.1
0.10.0
0.11.0
0.12.0
0.12.1
0.13.0
0.14.0
0.15.0
0.16.0
1.*
1.0.0-beta-001
1.0.0-beta-002
1.0.0-beta-003
1.0.0-beta-004
1.0.0-beta-005
1.0.0-beta-006
1.0.0
1.1.0
1.1.1
1.2.0
1.2.1
1.2.2
1.2.3
1.2.4
1.2.5
1.2.6
1.2.7
1.2.8
1.2.9
2.*
2.0.0-alpha-001
2.0.0-alpha-002
2.0.0-alpha-003
2.0.0-alpha-004
2.0.0-alpha-005
2.0.0-alpha-006
2.0.0
2.0.1
2.1.0
2.1.1
2.1.2
2.1.3
2.1.4
3.*
3.0.0
3.0.1
3.0.2
3.0.3
3.0.4
3.0.5
3.0.6
3.0.7
3.1.0
3.2.0
3.2.1
3.2.2
3.3.0
3.3.1
3.3.2
3.3.3
3.4.0
3.4.1
3.4.2
3.5.0
3.6.0
3.7.0
3.8.0
3.8.1
3.8.2
3.9.0
4.*
4.0.0
4.0.1
4.0.2
4.1.0
5.*
5.0.0
5.1.0
5.2.0
5.3.0
5.4.0
5.4.1
5.4.2
5.4.3
5.4.4
5.4.5
5.4.6
5.5.0
5.5.1
5.5.2
5.6.0
5.7.0
5.8.0
5.9.0
5.9.1
5.10.0
5.11.0
5.12.0
5.12.1
6.*
6.0.0
6.1.0
6.2.0
6.2.1
6.3.0
6.4.0
6.5.0
6.5.1
6.5.2
6.5.3
6.5.4
6.5.5
6.5.6
6.5.7
6.5.8
6.6.0

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-p6q4-fgr8-vx4p/GHSA-p6q4-fgr8-vx4p.json"