What is the CVSS score of CVE-2026-2796?

CVE-2026-2796 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of Mozilla are affected by CVE-2026-2796?

A critical vulnerability in Firefox and Thunderbird (CVE-2026-2796) allows remote code execution through malicious WebAssembly content with a 9.8 CVSS score.. A patch is available.

Is there a public PoC exploit available for CVE-2026-2796?

Yes, a public proof-of-concept exploit is available for CVE-2026-2796. Prioritise patching immediately. EPSS: 0.1%.

Mozilla CVE-2026-2796

Q: How to fix or mitigate CVE-2026-2796?

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. Within 30 days: Deploy patch version 148+ to all Firefox and Thunderbird instances as soon as vendor releases it; verify successful patching across the enterprise.

CRITICAL

Access of Resource Using Incompatible Type (Type Confusion) (CWE-843)

2026-02-24 security@mozilla.org

Information Disclosure Memory Corruption Mozilla

9.8

CVSS 3.1

CVSS VectorNVD

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

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

DescriptionNVD

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

AnalysisAI

JIT miscompilation in Firefox WebAssembly before 148. The JIT compiler generates incorrect Wasm code, enabling type confusion. …

RemediationAI

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. …

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

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CVE-2026-2796 vulnerability details – vuln.today

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Mozilla CVE-2026-2796

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

AnalysisAI

RemediationAI

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External POC / Exploit Code