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

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Mozilla Firefox affected
Version Status Constraints
unspecified affected < 148

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

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

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

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-02-24T15:56:04.804Z

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

Link: CVE-2026-2804

cve-icon Vulnrichment

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

cve-icon NVD

Status : Received

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

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

Link: CVE-2026-2804

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses