CVE-2026-4726 Details
Description
Denial-of-service in the XML component. This vulnerability was fixed in Firefox 149 and Thunderbird 149.
A denial-of-service vulnerability has been identified in the XML component of Mozilla Firefox. This issue affects versions of Firefox prior to 149. The vulnerability can be exploited to cause a denial-of-service condition, although specific details on the exploitation method are not provided.
Users can upgrade to Firefox 149 to address this vulnerability.
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 Mar 25, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=1955311 | [email protected] | Permissions Required |
| https://www.mozilla.org/security/advisories/mfsa2026-20/ | [email protected] | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2026-23/ | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-400 | Uncontrolled Resource Consumption | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| mozilla firefox | < 149.0 |
CPE
Remediation
| |
| mozilla thunderbird | < 149.0 |
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] |
| Mar 25, 2026 | Initial Analysis | [email protected] |
| Mar 25, 2026 | CVE Modified | CISA-ADP |
| Mar 24, 2026 | CVE Modified | [email protected] |
| Mar 24, 2026 | New CVE Received | [email protected] |