CVE-2026-57962

Denial-of-service via malicious LDAP address-book server

Medium · published July 1, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
26.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00340 · 26.2th percentile
Published
2026-07-01T00:58Z
EPSS history
Timeline
  • 01 JUL 00:58Z
    Denial-of-service via malicious LDAP address-book server
    cvelistv5