CVE-2026-93749 — source-map-js through 1.2.1 Event Loop Denial of Service
source-map-js through 1.2.1 fails to validate the per-section offset line value in indexed source maps, allowing attackers to specify arbitrary numeric values. Attackers can sup…
Published: 2026-09-18 · CVSS: 8.7 · CVSS 4.0
source-map-js through 1.2.1 fails to validate the per-section offset line value in indexed source maps, allowing attackers to specify arbitrary numeric values. Attackers can supply extremely large offset line values that cause synchronous event loop blocking for extended periods, preventing the service from handling other requests.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7