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HIGH

CVE-2026-93749

CVSS v3

7.5

HIGH

EPSS Score

0.6 %

exploit probability, as of 2026-09-28

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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.

Technical details

Published
2026-09-18
Last Modified
2026-09-18

Frequently asked questions

What is CVE-2026-93749?

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.

Is CVE-2026-93749 actively exploited?

Active exploitation of CVE-2026-93749 has not been confirmed. Its EPSS score was 0.6% on 2026-09-28, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-93749?

CVE-2026-93749 has a CVSS v3 base score of 7.5 (HIGH severity).

Is CVE-2026-93749 affecting your environment?

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