🔐 CVE Alert

CVE-2026-0889

HIGH 7.5

Denial-of-service in the DOM: Service Workers component

CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th

Denial-of-service in the DOM: Service Workers component. This vulnerability was fixed in Firefox 147 and Thunderbird 147.

Vendor mozilla
Product firefox
Ecosystems
Industries
Technology
Published Jan 13, 2026
Last Updated Apr 13, 2026
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Affected Versions

Mozilla / Firefox
All versions affected
Mozilla / Thunderbird
All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗
bugzilla.mozilla.org: https://bugzilla.mozilla.org/show_bug.cgi?id=1999084 mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-01/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-04/

Credits

Elysee Franchuk, Caleb Lerch