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Same-origin policy bypass in the DOM: Service Workers component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

Critical CVSS 9.1
CVECVE-2026-74956
First seen2026-08-19 00:30 UTC
Disclosed2026-08-18 13:17 UTC
Last updated2026-08-19 01:15 UTC
Channel statusauto

Summary

Same-origin policy bypass in the DOM: Service Workers component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

In-depth triage

No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).

Affected products

  • :

Sources

  • NVD DATABASE

Original Links

Timeline

  1. nvd_ingest NVD