CVE-2026-2798

HIGH
2026-02-24 [email protected]
8.8
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
Patch Released
Apr 10, 2026 - 14:30 nvd
Patch available
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
CVE Published
Feb 24, 2026 - 14:16 nvd
HIGH 8.8

Tags

Use After Free Firefox Thunderbird Redhat Suse

Description

Use-after-free in the DOM: Core & HTML component. This vulnerability affects Firefox < 148 and Thunderbird < 148.

Analysis

A use-after-free vulnerability in Firefox and Thunderbird's DOM processing allows remote attackers to execute arbitrary code through a malicious webpage or email attachment, requiring only user interaction to trigger. This affects Firefox versions below 148 and Thunderbird versions below 148, with no patch currently available.

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Remediation

Within 24 hours: Inventory all Firefox and Thunderbird deployments across the organization and identify systems running versions below 148. Within 7 days: Communicate patch availability timeline to end users and establish mandatory upgrade deadline; restrict use of affected versions on sensitive workstations if possible. …

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Priority Score

44
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +44
POC: 0

Vendor Status

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CVE-2026-2798 vulnerability details – vuln.today
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