Publish GHSA-p6q4-fgr8-vx4p

Author: advisory-database[bot]

advisories/github-reviewed/2026/03/GHSA-p6q4-fgr8-vx4p/GHSA-p6q4-fgr8-vx4p.json

@@ -0,0 +1,59 @@
+{
+  "schema_version": "1.4.0",
+  "id": "GHSA-p6q4-fgr8-vx4p",
+  "modified": "2026-03-24T22:06:24Z",
+  "published": "2026-03-24T22:06:24Z",
+  "aliases": [],
+  "summary": "Scriban has a Stack Overflow via Nested Array Initializers That Bypass the ExpressionDepthLimit Fix",
+  "details": "### Summary\nStackOverflowException via nested array initializers bypasses ExpressionDepthLimit fix (GHSA-wgh7-7m3c-fx25)\n\n### Details\nThe 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.\n\nThis causes a `StackOverflowException` on current main (commit b5ac4bf - \"Add limits for default safety\").\n\n### PoC\n```\nusing Scriban;\n\n// ExpressionDepthLimit (default 250) does NOT prevent this crash\nstring nested = \"{{ \" + new string('[', 5000) + \"1\" + new string(']', 5000) + \" }}\";\nTemplate.Parse(nested); // StackOverflowException - process terminates\n```\n\n### Impact\nSame 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.",
+  "severity": [
+    {
+      "type": "CVSS_V3",
+      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
+    }
+  ],
+  "affected": [
+    {
+      "package": {
+        "ecosystem": "NuGet",
+        "name": "Scriban"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "0"
+            },
+            {
+              "fixed": "7.0.0"
+            }
+          ]
+        }
+      ]
+    }
+  ],
+  "references": [
+    {
+      "type": "WEB",
+      "url": "https://github.com/scriban/scriban/security/advisories/GHSA-p6q4-fgr8-vx4p"
+    },
+    {
+      "type": "ADVISORY",
+      "url": "https://github.com/advisories/GHSA-wgh7-7m3c-fx25"
+    },
+    {
+      "type": "PACKAGE",
+      "url": "https://github.com/scriban/scriban"
+    }
+  ],
+  "database_specific": {
+    "cwe_ids": [
+      "CWE-674"
+    ],
+    "severity": "HIGH",
+    "github_reviewed": true,
+    "github_reviewed_at": "2026-03-24T22:06:24Z",
+    "nvd_published_at": null
+  }
+}