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CVE-2026-42345: Broken Json String Escaping Lookbehind Replacecve-2026-42345-broken-json-string-escaping-lookbehind-replace

Insecure manual JSON string escaping: using .replace(/(?<!\\)"/g, '\\"') to sanitize user-controlled values for JSON string interpolation is bypassable. The negative lookbehind treats a user-supplied backslash before a double-quote as an escape prefix, so that quote is left unescaped in the output. Because the backslash itself is never encoded to '\\', the J

JSCVE-2026-42345CWE-116CWE-74
by Provallyupdated 2026-06-12Apache-2.0
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