Use-After-Free Vulnerability in Firefox IPC Component from Mozilla
CVE-2026-0882

8.8HIGH

Key Information:

Vendor

Mozilla
Status
Firefox
Firefox Esr
Thunderbird
Vendor
CVE Published:
13 January 2026

What is CVE-2026-0882?

A use-after-free vulnerability has been identified in the IPC component of Mozilla Firefox, which could lead to potential exploitation and unauthorized access. This issue affects various versions of Firefox, including those prior to version 147, as well as extended support releases (ESR) below version 115.32 and version 140.7. Users are advised to update their browsers to the latest versions to mitigate risk and ensure security.

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Affected Version(s)

Firefox < 147

Firefox ESR < 115.32

Firefox ESR < 140.7

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1924125
https://www.mozilla.org/security/advisories/mfsa2026-01/
https://www.mozilla.org/security/advisories/mfsa2026-02/

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Randell Jesup
JSON
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