Unspecified impact via crafted IMAP line
Published Sep 15, 2026 · Updated Sep 15, 2026
Out-of-bounds read in Thunderbird before 140.16 allows attackers to cause unspecified impact via a maliciously constructed IMAP line. The IMAP parsing path reads beyond a buffer boundary when it handles the crafted line, but Mozilla has not disclosed the responsible function or operation. Reachability requires Thunderbird to process the line during an IMAP session; Mozilla has not published the resulting security consequence.
Summary
What happened
Out-of-bounds read in Thunderbird before 140.16 allows attackers to cause unspecified impact via a maliciously constructed IMAP line. The IMAP parsing path reads beyond a buffer boundary when it handles the crafted line, but Mozilla has not disclosed the responsible function or operation. Reachability requires Thunderbird to process the line during an IMAP session; Mozilla has not published the resulting security consequence.
The record
- CVE
- CVE-2026-92239
- Published
- Sep 15, 2026
- Updated
- Sep 15, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- Unavailable
- Attack vector
- network
- Privileges
- Unavailable
Timeline
How it unfolded
- Sep 15, 2026CVE publishedPublication date reported by the CVE source.
- Sep 15, 2026Record updatedLatest update available in the CVE record.
Exploitability
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What is affected?
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Published CVSS scores
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Attacks
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Public exploit references
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Technologies
Your stack
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