CVE-2026-92240
Out-of-bounds read in IMAP response parser
- State
- Published
- Severity
- 9.1 Critical
- Published
- Sep 15, 2026
- Updated
- Sep 22, 2026
- Reserved
- Sep 15, 2026
Description
A malicious or compromised IMAP server can trigger an out-of-bounds read in the IMAP response parser by sending an untagged '* ID' response, crashing Thunderbird. The affected parsing path is reachable before authentication. This vulnerability was fixed in Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 9.1 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H | CISA-ADP |
Weaknesses
- CWE-125 Out-of-bounds Read
Affected Products
| Product | Versions |
|---|---|
ThunderbirdMozilla |
|
References
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