CVE-2026-2796

CWE-8439 documents8 sources
Severity
9.8CRITICAL
EPSS
0.1%
top 75.09%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Mozilla FirefoxMozilla Thunderbird
Timeline
PublishedFeb 24

Description

JIT miscompilation in the JavaScript: WebAssembly component. This vulnerability affects Firefox < 148 and Thunderbird < 148.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9

Affected Packages4 packages

▶CVEListV5mozilla/firefoxunspecified — 148
▶NVDmozilla/firefox< 148.0
▶CVEListV5mozilla/thunderbirdunspecified — 148
▶NVDmozilla/thunderbird< 148.0

🔴Vulnerability Details

3
GHSA
GHSA-c3q8-4689-m4p6: JIT miscompilation in the JavaScript: WebAssembly component↗2026-02-24
▶
CVEList
JIT miscompilation in the JavaScript: WebAssembly component↗2026-02-24
▶
OSV
CVE-2026-2796: JIT miscompilation in the JavaScript: WebAssembly component↗2026-02-24
▶

📋Vendor Advisories

4
Red Hat
firefox: thunderbird: JIT miscompilation in the JavaScript: WebAssembly component↗2026-02-24
▶
Debian
CVE-2026-2796: firefox - JIT miscompilation in the JavaScript: WebAssembly component. This vulnerability ...↗2026
▶
Mozilla
Mozilla Foundation Security Advisory 2026-16: CVE-2026-2796↗
▶
Mozilla
Mozilla Foundation Security Advisory 2026-13: CVE-2026-2796↗
▶

🕵️Threat Intelligence

1
Wiz
CVE-2026-2796 Impact, Exploitability, and Mitigation Steps | Wiz↗
▶
CVE-2026-2796 (CRITICAL CVSS 9.8) | JIT miscompilation in the JavaScrip | cvebase.io