Improper Validation of Specified Quantity in Input in source-map-js - CVE-2026-93749

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Main Vulnerability Database Vulnerabilities #VU158585

Improper Validation of Specified Quantity in Input in source-map-js - CVE-2026-93749

Published: November 2, 2026


Vulnerability identifier: #VU158585
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-93749
CWE-ID: CWE-1284
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to source-map-js to validate the per-section offset line value in indexed source maps. A remote attacker can supply extremely large offset line values that cause synchronous event loop blocking for extended periods, preventing the service from handling other requests.


Affected software

source-map-js
Automation Assets in IBM Cloud Pak for Integration (CP4I)
Platform Navigator in IBM Cloud Pak for Integration (CP4I)

How to mitigate CVE-2026-93749

Install updates from vendor's website.

source-map-js - update to 1.2.2
Automation Assets in IBM Cloud Pak for Integration (CP4I) - addressed in versions 4.0.27-sc2, 4.4.4
Platform Navigator in IBM Cloud Pak for Integration (CP4I) - addressed in versions 16.2.0.5, 16.2.1.1

External References

Related Security Bulletins