CVE-2026-93749: Improper Validation of Specified Quantity in Input in 7rulnik source-map-js
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.
CVE-2026-93749: Improper Validation of Specified Quantity in Input in 7rulnik source-map-js
Description
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.
CVSS v4.0
Score 8.7high
Affected software
7rulnik
source-map-js
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-18T16:30:17.433Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6aad7cac55bf5e2cf55a40b8
Added to database: 09/18/2026, 18:02:20 UTC
Last updated: 09/18/2026, 18:02:20 UTC
Views: 1
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