CVE-2026-2807

CRITICAL
2026-02-24 [email protected]
9.8
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
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
CRITICAL 9.8

Tags

Memory Corruption Firefox Thunderbird Redhat Suse

Description

Memory safety bugs present in Firefox 147 and Thunderbird 147. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 148 and Thunderbird < 148.

Analysis

Memory safety bugs in Firefox 147 and Thunderbird 147 with evidence of memory corruption. Mainline-only bugs not present in ESR branches.

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Remediation

Within 24 hours: Inventory all systems running Firefox 147 and Thunderbird 147; communicate vulnerability to affected users and management. Within 7 days: Disable or uninstall affected versions, or downgrade to Firefox 146/Thunderbird 146 if critical for operations; implement application whitelisting to prevent execution of vulnerable versions. …

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Priority Score

49
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +49
POC: 0

Vendor Status

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CVE-2026-2807 vulnerability details – vuln.today
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