CVE-2026-57962
Denial-of-service via malicious LDAP address-book server
Vexday Risk Score
13Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 5.3EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
01 Jul 2026Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
Affected products
Mozilla · Thunderbird