CVE-2026-57962

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

CVSS 5.3 MEDIUMEPSS 0.2%CWE-400

Vexday Risk Score

13Baixo

Decisão SSVC (CISA)

Track

Sem sinal de exploração → monitorar

CVSS 5.3EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Ciclo de vida

01 jul 2026Publicada no NVD

Recomendação: Monitorar — sem sinal de exploração no momento.

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

Produtos afetados

Mozilla · Thunderbird

Referências

https://bugzilla.mozilla.org/show_bug.cgi?id=2042872 https://www.mozilla.org/security/advisories/mfsa2026-63/https://www.mozilla.org/security/advisories/mfsa2026-64/