CVE-2026-4729 identifies multiple memory safety bugs in Mozilla Firefox and Thunderbird versions prior to 149. These critical vulnerabilities, rated CVSS 9.8, could lead to arbitrary code execution due to memory corruption, requiring no user interaction or privileges for exploitation over a network. Despite the severe potential impact, there is currently no evidence of active exploitation, public exploit code availability, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 149.0CPE matchmatch criteria | cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:* | ||
< 149.0CPE matchmatch criteria | cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.