CVE-2026-2804 is a use-after-free vulnerability in the JavaScript: WebAssembly component affecting Mozilla Firefox and Thunderbird versions prior to 148. This medium-severity flaw (CVSS 5.4) can be exploited remotely with low attack complexity, requiring user interaction, and could lead to limited confidentiality and integrity impacts. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or inclusion in CISA's KEV catalog. Community discussion and media coverage are minimal, with only one security advisory identified.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 148.0CPE matchmatch criteria | cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:* | ||
< 148.0CPE 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:R/S:U/C:L/I:L/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.