CVE-2026-0889 Details
Description
Denial-of-service in the DOM: Service Workers component. This vulnerability was fixed in Firefox 147 and Thunderbird 147.
A denial-of-service vulnerability has been identified in the DOM: Service Workers component of Mozilla Firefox. This issue affects versions of Firefox prior to 147. The vulnerability arises when a site registers a service worker with a large script, causing the browser to crash. The crash is triggered by a null pointer dereference after an oversized string payload is processed, exceeding the maximum length allowed.
Users can update to Firefox 147 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jan 13, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=1999084 | [email protected] | ExploitIssue TrackingVendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2026-01/ | [email protected] | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2026-04/ | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-400 | Uncontrolled Resource Consumption | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| mozilla firefox | < 147.0 |
CPE
Remediation
| |
| mozilla thunderbird | < 147.0 |
CPE
Remediation
| |
Change History
7 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Apr 13, 2026 | CVE Modified | [email protected] |
| Jan 22, 2026 | Initial Analysis | [email protected] |
| Jan 15, 2026 | CVE Modified | [email protected] |
| Jan 13, 2026 | CVE Modified | CISA-ADP |
| Jan 13, 2026 | New CVE Received | [email protected] |