CVE detail
CVE-2026-14899
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.
Buzz score
Why this CVE is surfacing
This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.
Buzz score components · mention 13.9 · diversity 10.0 · KEV 0.0 · OTX 0.0 · PoC 0.0
Why it matters now
Mention timeline
- Total mentions
- 3
- within the 30d window
- Peak daily
- 3
- highest bucket
Evidence
Source links by recency
3 source links · newest first
- https://www.mozilla.org/security/advisories/mfsa2026-72/www.mozilla.org
No excerpt available.
Vendor Advisorywww.mozilla.orgJul 22, 2026, 8:16 PM - https://www.mozilla.org/security/advisories/mfsa2026-71/www.mozilla.org
No excerpt available.
Vendor Advisorywww.mozilla.orgJul 22, 2026, 8:16 PM - https://bugzilla.mozilla.org/show_bug.cgi?id=2046137bugzilla.mozilla.org
No excerpt available.
Exploitbugzilla.mozilla.orgJul 22, 2026, 8:16 PM
Exploit code
Public exploit repository references
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