Ambiguous parsing of mail headers
cve-program · CVE-2026-92238
PublishedA maliciously constructed mail header could lead to multiple fields being parsed as one, or potential memory safety violations. This vulnerability was fixed in Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.
Read the publisher's advisoryAffected versions, risk and source history
Exploitation and risk
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Risk history
Compare earlier KEV listings and daily EPSS scores. Advisory wording and affected versions have a separate history.
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Advisory history
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