CVE-2026-57962

UNKNOWN 0.0

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

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

Vendor	mozilla
Product	thunderbird
Ecosystems	Browser JavaScript
Industries	Technology
Published	Jul 1, 2026

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Affected Versions

Mozilla / Thunderbird

All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗

bugzilla.mozilla.org: https://bugzilla.mozilla.org/show_bug.cgi?id=2042872 mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-62/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-63/

Credits

Michael Bommarito