CVE-2026-57962

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 v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.6 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=2042872	Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-63/	Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-64/	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:mozilla:thunderbird:::::esr:::*
	cpe:2.3:a:mozilla:thunderbird:::::-:::*

History

No history.

Information

Published : 2026-07-01 02:17

Updated : 2026-07-06 15:21

NVD link : CVE-2026-57962

Mitre link : CVE-2026-57962

CVE.ORG link : CVE-2026-57962

JSON object : View

Products Affected

mozilla

thunderbird

CWE

CWE-400

Uncontrolled Resource Consumption

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