CVE-2026-2796
CRITICAL
2026-02-24
[email protected]
9.8
CVSS 3.1
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CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Lifecycle Timeline
4
Patch Released
Apr 10, 2026 - 08:30 nvd
Patch available
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
PoC Detected
Feb 27, 2026 - 21:16 vuln.today
Public exploit code
CVE Published
Feb 24, 2026 - 14:16 nvd
CRITICAL 9.8
Description
JIT miscompilation in the JavaScript: WebAssembly component. This vulnerability affects Firefox < 148 and Thunderbird < 148.
Analysis
JIT miscompilation in Firefox WebAssembly before 148. The JIT compiler generates incorrect Wasm code, enabling type confusion. …
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Remediation
Within 24 hours: Inventory all Firefox and Thunderbird installations across the organization and communicate risk to users; disable WebAssembly in browser settings where feasible. Within 7 days: Deploy network controls to restrict access to high-risk websites and monitor for exploitation attempts. …
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Priority Score
69
Low
Medium
High
Critical
KEV: 0
EPSS: +0.1
CVSS: +49
POC: +20
Vendor Status
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External POC / Exploit Code
Leaving vuln.today
Destination URL
POC code from unknown sources may be malicious, contain backdoors, or be fake.
Always review and test exploit code in a safe, isolated environment (VM/sandbox).
Verify the source reputation and cross-reference with known databases (Exploit-DB, GitHub Security).