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Vulnerability record · CVE-2026-0889 · published 13 January 2026

CVE-2026-0889: Mozilla firefox uncontrolled resource consumption vulnerability

Mozilla · Firefox

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

7.5 CVSS 3.1 High EPSS 0.60% · top 53.2% CWE-400 · Uncontrolled resource consumption
7.5CVSS 3.1 base score
0.60%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
3References, 1 tagged exploit
17 Jun 2026Last modified by NVD

Description

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

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.mozilla.org/show_bug.cgi?id=1999084 ExploitIssue TrackingVendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-01/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-04/ Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-0889), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.