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CVE-2026-92239

thunderbird: Thunderbird: Out-of-bounds read via maliciously constructed IMAP line

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Severity

Moderate

Red Hat Product Security

6.1

CVSS 3.1

Review impact separately from score.

Published · September 16, 2026

Updated · October 13, 2026

Description

A flaw was found in Thunderbird. A remote attacker could exploit this vulnerability by sending a maliciously constructed Internet Message Access Protocol (IMAP) line. This could lead to an out-of-bounds buffer read, potentially resulting in information disclosure or a denial of service.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 6.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CWE-125 · Out-of-bounds Read