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.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Thunderbird | affected |
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Fixes
Solution
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Workaround
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References
History
Wed, 01 Jul 2026 01:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Denial-of-service via malicious LDAP address-book server | |
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MITRE
Status: PUBLISHED
Assigner: mozilla
Published:
Updated: 2026-07-01T00:58:32.777Z
Reserved: 2026-06-26T15:27:32.831Z
Link: CVE-2026-57962
Vulnrichment
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Redhat
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Weaknesses
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