{"items":[{"id":"NVI-00017602","kind":"vulnerability","title":"@asymmetric-effort/nogginlessdom vulnerable to ReDoS via user-controlled regex in HTMLInputElement pattern validation","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-x4hg-hfwf-p9mw"],"plain_summary":"GitHub lists this reviewed advisory for @asymmetric-effort/nogginlessdom. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-2ab7950832e8ff2b662cf2da47d99e0a"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-2ab7950832e8ff2b662cf2da47d99e0a","url":"https://github.com/advisories/GHSA-x4hg-hfwf-p9mw","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-x4hg-hfwf-p9mw","publisher":"GitHub Advisory Database","observed_at":"2026-11-05T03:47:11.081Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-2ab7950832e8ff2b662cf2da47d99e0a"],"technology":"@asymmetric-effort/nogginlessdom","known_exclusions":[],"conditions_summary":"## Summary\n\nThe `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.\n\n## Fix\n\nFixed in commit https://github.com/asymmetric-effort/NogginLessDom/commit/25a3cbac665fae5663f8b71c073b80c3152dbe7b on `main`. Added:\n- Pattern length limit (1024 characters)\n- Nested quantifier detection (`hasNestedQuantifiers`) that rejects patterns like `(a+)+` before constructing the regex\n- Patterns exceeding limits are treated as non-matching (safe default)","public_affected_ranges":["<= 0.0.21"]}],"null_published_at":"2026-11-05T19:10:21.425Z","source_updated_at":"2026-07-02T20:20:04.000Z","source_disclosed_at":"2026-07-02T20:20:04.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-05T03:47:11.081Z"}],"next_cursor":null,"snapshot_revision":"42594"}