CVE-2026-0884 - Vulnerability Details - OpenCVE

Use-after-free in the JavaScript Engine component. This vulnerability affects Firefox < 147 and Firefox ESR < 140.7.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable yes

Technical Impact total

No data.

No data.

No data.

No data.

References

Link	Providers
https://bugzilla.mozilla.org/show_bug.cgi?id=2003588
https://www.mozilla.org/security/advisories/mfsa2026-01/
https://www.mozilla.org/security/advisories/mfsa2026-03/

History

Tue, 13 Jan 2026 16:15:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-416
Metrics		cvssV3_1 `{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}` ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Tue, 13 Jan 2026 14:00:00 +0000

Type	Values Removed	Values Added
Description		Use-after-free in the JavaScript Engine component. This vulnerability affects Firefox < 147 and Firefox ESR < 140.7.
Title		Use-after-free in the JavaScript Engine component
References		https://bugzilla.mozilla.org/show_bug.cgi?id=2003588 https://www.mozilla.org/security/advisories/mfsa2026-01/ https://www.mozilla.org/security/advisories/mfsa2026-03/

MITRE

Status: PUBLISHED

Assigner: mozilla

Published: 2026-01-13T13:30:56.543Z

Updated: 2026-01-13T15:37:27.838Z

Reserved: 2026-01-13T13:30:56.343Z

Link: CVE-2026-0884

Vulnrichment

Updated: 2026-01-13T15:36:28.191Z

NVD

Status : Received

Published: 2026-01-13T14:16:38.950

Modified: 2026-01-13T16:16:11.787

Link: CVE-2026-0884

Redhat

No data.

OpenCVE Enrichment

No data.

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