High severity7.5NVD Advisory· Published Sep 18, 2026

CVE-2026-93749

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.

Affected products

7rulnik/source-map-jsllm-create
Range: <=1.2.1

Patches

Vulnerability mechanics

References

github.com/7rulnik/source-map-js/blob/c1cd8904bb7bd0c7fb5879fcda48134d82a27934/lib/source-node.jsnvd
github.com/7rulnik/source-map-js/issues/76nvd
www.vulncheck.com/advisories/source-map-js-through-1.2.1-event-loop-denial-of-servicenvd

News mentions

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