CVE-2026-2804 - Vulnerability Details - OpenCVE

Use-after-free in the JavaScript: WebAssembly component. This vulnerability affects Firefox < 148 and Thunderbird < 148.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

No data.

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References

Link	Providers
https://bugzilla.mozilla.org/show_bug.cgi?id=2013584
https://www.mozilla.org/security/advisories/mfsa2026-13/
https://www.mozilla.org/security/advisories/mfsa2026-16/

History

Tue, 24 Feb 2026 18:00:00 +0000

Type	Values Removed	Values Added
Description	Use-after-free in the JavaScript: WebAssembly component. This vulnerability affects Firefox < 148.	Use-after-free in the JavaScript: WebAssembly component. This vulnerability affects Firefox < 148 and Thunderbird < 148.
References		https://www.mozilla.org/security/advisories/mfsa2026-16/

Tue, 24 Feb 2026 16:15:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-416
Metrics		cvssV3_1 `{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N'}` ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Tue, 24 Feb 2026 14:00:00 +0000

Type	Values Removed	Values Added
Description		Use-after-free in the JavaScript: WebAssembly component. This vulnerability affects Firefox < 148.
Title		Use-after-free in the JavaScript: WebAssembly component
References		https://bugzilla.mozilla.org/show_bug.cgi?id=2013584 https://www.mozilla.org/security/advisories/mfsa2026-13/

MITRE

Status: PUBLISHED

Assigner: mozilla

Published: 2026-02-24T13:33:32.144Z

Updated: 2026-02-24T17:30:44.942Z

Reserved: 2026-02-19T15:07:01.585Z

Link: CVE-2026-2804

Vulnrichment

Updated: 2026-02-24T15:55:59.764Z

NVD

Status : Received

Published: 2026-02-24T14:16:28.917

Modified: 2026-02-24T18:29:38.577

Link: CVE-2026-2804

Redhat

No data.

OpenCVE Enrichment

No data.

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