CVE-2025-26695
5.3
MEDIUM
CVSS 3.1
EPSS 0.05%
Description
When requesting an OpenPGP key from a WKD server, an incorrect padding size was used and a network observer could have learned the length of the requested email address. This vulnerability was fixed in Thunderbird 136 and Thunderbird 128.8.
How to fix CVE-2025-26695
To remediate CVE-2025-26695, upgrade the affected package to a fixed version below.
- Debian/thunderbird—upgrade to 1:128.8.0esr-1~deb11u1 or later
Is CVE-2025-26695 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1:128.8.0esr-1~deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L |