CVE-2026-57962
Last modified
CVE-2026-57962 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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.. EPSS estimates a 0.22% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Thunderbird | < 140.12.1 |
| Mozilla | Thunderbird | < 152.0.1 |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2042872Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2026-63/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-64/Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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