CVE-2026-4726 | BDVDB-2026-322222 Detail

MozillaFirefox

Description#

Denial-of-service in the XML component. This vulnerability was fixed in Firefox 149 and Thunderbird 149.

Per CVSS v3.1: confidentiality impact none, integrity impact none, availability impact high. Attack vector: network.

No public exploit known

7.5 High

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 47.1.

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Denial of Service

No specific action is recorded in the source data. Check the references for vendor guidance.

Not available

7.5 High

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

Not available

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).