What’s Vulnerable › Vulnerabilities

CVE-2022-2226

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-12-22 · updated 2026-06-17
• Weakness: CWE-294

Description

An OpenPGP digital signature includes information about the date when the signature was created. When displaying an email that contains a digital signature, the email's date will be shown. If the dates were different, then Thunderbird didn't report the email as having an invalid signature. If an attacker performed a replay attack, in which an old email with old contents are resent at a later time, it could lead the victim to believe that the statements in the email are current. Fixed versions of Thunderbird will require that the signature's date roughly matches the displayed date of the email. This vulnerability affects Thunderbird < 102 and Thunderbird < 91.11.

Affected products

• Mozilla Thunderbird: before 91.11; 101.0 — fixed in 91.11

How to fix

Upgrade to a fixed version: Mozilla Thunderbird 91.11. Check the vendor advisory for mitigations.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1775441
• https://www.mozilla.org/security/advisories/mfsa2022-26/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1775441
• https://www.mozilla.org/security/advisories/mfsa2022-26/

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