CVE-2026-109773 | BDVDB-2026-388643 Detail

MozillaFirefox

Description#

Denial-of-service in the Sync component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.

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

No public exploit known

6.5 Medium

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 14.9.

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

6.5 Medium

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

Not available

Not available

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