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VULNERABILITIES

CVE-2026-93749 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/7rulnik/source-map-js [email protected]
https://github.com/7rulnik/source-map-js/blob/c1cd8904bb7bd0c7fb5879fcda48134d82a27934/lib/source-node.js#L115-L118 [email protected]
https://github.com/7rulnik/source-map-js/issues/76 [email protected]
https://www.vulncheck.com/advisories/source-map-js-through-1.2.1-event-loop-denial-of-service [email protected]

Weakness Enumeration

CWE-IDCWE NameSource
CWE-1284Improper Validation of Specified Quantity in Input[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-93749
NVD Published Date:
Sep 18, 2026
NVD Last Modified:
Sep 22, 2026
Source:
[email protected]
CVE-2026-93749 Details - Not Deferred