CVE-2026-57962
Received Received - Intake

BaseFortify

Publication date: 2026-07-01

Last updated on: 2026-07-01

Assigner: Mozilla Corporation

Description
A malicious LDAP server, which a Thunderbird user is configured to query for address-book autocomplete, can stash arbitrarily large amounts of attacker-supplied data into the Thunderbird LDAP client until it crashes due to memory exhaustion. This vulnerability was fixed in Thunderbird 152.0.1 and Thunderbird 140.12.1.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-07-01
Last Modified
2026-07-01
Generated
2026-07-01
AI Q&A
2026-07-01
EPSS Evaluated
N/A
NVD
CVE-2026-57962
EUVD
EUVD-2026-40861

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
mozilla thunderbird 152.0.1
mozilla thunderbird 140.12.1
mozilla firefox 152.0.4
mozilla firefox 152.0.3

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-UNKNOWN

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability involves a malicious LDAP server that a Thunderbird user has configured for address-book autocomplete queries. The attacker can supply arbitrarily large amounts of data to the Thunderbird LDAP client, causing it to consume excessive memory and eventually crash due to memory exhaustion.

The issue was addressed and fixed in Thunderbird versions 152.0.1 and 140.12.1.

Impact Analysis

The primary impact of this vulnerability is that the Thunderbird email client can crash due to memory exhaustion when querying a malicious LDAP server. This can lead to denial of service, disrupting the user's ability to use the address-book autocomplete feature and potentially causing loss of unsaved data or interruption of workflow.

Mitigation Strategies

To mitigate this vulnerability, update Thunderbird to version 152.0.1 or later, or Thunderbird 140.12.1 or later, where the issue has been fixed.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-57962. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart