CVE-2025-26696

Description

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 affects Thunderbird < 136 and Thunderbird < 128.8.

Category

7.0
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.09%
Vendor Advisory mozilla.org Vendor Advisory mozilla.org
Affected: Mozilla Thunderbird
Affected: Mozilla Thunderbird
Published at:
Updated at:

References

Link Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=1864205 issue tracking
https://www.mozilla.org/security/advisories/mfsa2025-17/ vendor advisory
https://www.mozilla.org/security/advisories/mfsa2025-18/ vendor advisory

Frequently Asked Questions

What is the severity of CVE-2025-26696?
CVE-2025-26696 has been scored as a high severity vulnerability.
How to fix CVE-2025-26696?
To fix CVE-2025-26696, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-26696 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-26696 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-26696?
CVE-2025-26696 affects Mozilla Thunderbird, Mozilla Thunderbird.
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