What is the CVSS score of CVE-2026-2805?

CVE-2026-2805 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of Mozilla are affected by CVE-2026-2805?

A critical vulnerability (CVSS 9.8) in Firefox and Thunderbird versions below 148 allows remote attackers to execute arbitrary code through a memory corruption flaw in the DOM parser.. A patch is available.

Mozilla CVE-2026-2805

Q: How to fix or mitigate CVE-2026-2805?

Within 24 hours: Identify and inventory all Firefox and Thunderbird installations across the organization using endpoint detection tools; notify affected users of the risk and restrict access to untrusted websites pending mitigation. Within 7 days: Implement network-level controls to block known malicious domains; deploy WAF rules to block exploit payloads if identified; consider disabling JavaScript in email clients for non-essential users. Within 30 days: Monitor Mozilla's security advisories for patch availability; plan immediate deployment upon release; conduct vulnerability reassessment post-patching.

CRITICAL

Access of Uninitialized Pointer (CWE-824)

2026-02-24 security@mozilla.org

Information Disclosure Memory Corruption Mozilla

9.8

CVSS 3.1

CVSS VectorNVD

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

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

DescriptionNVD

Invalid pointer in the DOM: Core & HTML component. This vulnerability affects Firefox < 148 and Thunderbird < 148.

AnalysisAI

Invalid pointer in Firefox DOM Core & HTML before 148. Incorrect pointer computation leads to memory access errors.

RemediationAI

Within 24 hours: Identify and inventory all Firefox and Thunderbird installations across the organization using endpoint detection tools; notify affected users of the risk and restrict access to untrusted websites pending mitigation. Within 7 days: Implement network-level controls to block known malicious domains; deploy WAF rules to block exploit payloads if identified; consider disabling JavaScript in email clients for non-essential users. …

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

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CVE-2026-2805 vulnerability details – vuln.today

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Mozilla CVE-2026-2805

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

AnalysisAI

RemediationAI

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External POC / Exploit Code