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CVE-2026-14899

—
CVSS 3.1
7.5 high
EPSS
<1%p20
Published
()
Modified
Description

The code to parse MIME headers for display when forwarding a message (if the setting to view all headers was enabled) had an off-by-one error, allowing a single byte to be read from the memory after the buffer for the headers, and potentially crashing Thunderbird. This vulnerability was fixed in Thunderbird 153 and Thunderbird 140.13.

Vendors
mozilla
Products
thunderbird
Weakness
CWE-193
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD CVE.org GitHub PoCs EPSS (0.3%)

In the news

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