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.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
365293	Amazon Linux 2 : firefox (ALASFIREFOX-2026-066)	Nessus	Amazon Linux Local Security Checks	Local	high
365225	Amazon Linux 2023 : firefox (ALAS2023-2026-3214)	Nessus	Amazon Linux Local Security Checks	Local	high
473829	Echo: source-map-js: security update to 1.2.2	Tenable Cloud Security	Echo Local Security Checks	Local	high
473829	Echo: source-map-js: security update to 1.2.2	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	high
472987	SCA: security update for source-map-js (GHSA-68fv-2mgg-jv7q)	Tenable Cloud Security	SCA Checks	Local	high
472987	SCA: security update for source-map-js (GHSA-68fv-2mgg-jv7q)	Tenable Self-Hosted Container Security	SCA Checks	Local	high
348623	Linux Distros Unpatched Vulnerability : CVE-2026-93749	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2026-93749

high

Tenable Plugins

high

high

high

high

high

high

high