CVE-2026-0889
Denial-of-service in the DOM: Service Workers component
Severity Score
7.5
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
Attend
*SSVC
Descriptions
Denial-of-service in the DOM: Service Workers component. This vulnerability affects Firefox < 147.
Denial-of-service in the DOM: Service Workers component. This vulnerability affects Firefox < 147 and Thunderbird < 147.
These are all security issues fixed in the MozillaFirefox-147.0-1.1 package on the GA media of openSUSE Tumbleweed.
*Credits:
Elysee Franchuk, Caleb Lerch
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:Attend
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2026-01-13 CVE Reserved
- 2026-01-13 CVE Published
- 2026-01-15 CVE Updated
- 2026-01-19 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-400: Uncontrolled Resource Consumption
CAPEC
References (3)
| URL | Tag | Source |
|---|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=1999084 | ||
| https://www.mozilla.org/security/advisories/mfsa2026-01 | ||
| https://www.mozilla.org/security/advisories/mfsa2026-04 |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Mozilla Search vendor "Mozilla" | Firefox Search vendor "Mozilla" for product "Firefox" | * | - |
Affected
| ||||||
| Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | * | - |
Affected
| ||||||