CVE-2025-26696

HIGH 7.0

Crafted email message incorrectly shown as being encrypted

CVSS Score

7.0

EPSS Score

0.0%

EPSS Percentile

0th

Certain crafted MIME email messages that claimed to contain an encrypted OpenPGP message, which instead contained an OpenPGP signed message, were wrongly shown as being encrypted. This vulnerability was fixed in Thunderbird 136 and Thunderbird 128.8.

Vendor	mozilla
Product	thunderbird
Ecosystems	Browser JavaScript
Industries	Technology
Published	Mar 10, 2025
Last Updated	Apr 13, 2026

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Affected Versions

Mozilla / Thunderbird

All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗

bugzilla.mozilla.org: https://bugzilla.mozilla.org/show_bug.cgi?id=1864205 mozilla.org: https://www.mozilla.org/security/advisories/mfsa2025-17/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2025-18/

Credits

Marcus Brinkmann