PT-2026-57603 · Npm · @Asymmetric-Effort/Nogginlessdom
Published
2026-07-02
·
Updated
2026-07-02
CVSS v4.0
6.9
Medium
| Vector | AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N |
Summary
The
HTMLInputElement.checkValidity() method constructed a RegExp directly from the user-controlled pattern property without any sanitization or timeout protection. This allowed an attacker to inject a regex with catastrophic backtracking, freezing the event loop.Fix
Fixed in commit https://github.com/asymmetric-effort/NogginLessDom/commit/25a3cbac665fae5663f8b71c073b80c3152dbe7b on
main. Added:- Pattern length limit (1024 characters)
- Nested quantifier detection (
hasNestedQuantifiers) that rejects patterns like(a+)+before constructing the regex - Patterns exceeding limits are treated as non-matching (safe default)
Fix
DoS
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Weakness Enumeration
Related Identifiers
Affected Products
@Asymmetric-Effort/Nogginlessdom