CVE-2026-0889

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-0889
Denial-of-service in the DOM: Service Workers component. This vulnerability affects Firefox < 147 and Thunderbird < 147.

7.5 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=1999084 Exploit Issue Tracking Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-01/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-04/ Vendor Advisory
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*
History

22 Jan 2026, 19:09

Type Values Removed Values Added
First Time Mozilla
Mozilla firefox
Mozilla thunderbird
CPE cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*
References () https://bugzilla.mozilla.org/show_bug.cgi?id=1999084 - () https://bugzilla.mozilla.org/show_bug.cgi?id=1999084 - Exploit, Issue Tracking, Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2026-01/ - () https://www.mozilla.org/security/advisories/mfsa2026-01/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2026-04/ - () https://www.mozilla.org/security/advisories/mfsa2026-04/ - Vendor Advisory

15 Jan 2026, 10:16

Type Values Removed Values Added
Summary (en) Denial-of-service in the DOM: Service Workers component. This vulnerability affects Firefox < 147. (en) Denial-of-service in the DOM: Service Workers component. This vulnerability affects Firefox < 147 and Thunderbird < 147.
References
  • () https://www.mozilla.org/security/advisories/mfsa2026-04/ -

13 Jan 2026, 21:15

Type Values Removed Values Added
CWE CWE-400
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.5

13 Jan 2026, 14:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-01-13 14:16

Updated : 2026-01-22 19:09

NVD link : CVE-2026-0889

Mitre link : CVE-2026-0889

CVE.ORG link : CVE-2026-0889

JSON object : View

Products Affected

mozilla

  • thunderbird
  • firefox
CWE
CWE-400

Uncontrolled Resource Consumption