| Name | CVE-2025-26695 |
| 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 affects Thunderbird < 136 and Thunderbird < 128.8. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-4081-1, DSA-5876-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| thunderbird (PTS) | bullseye | 1:115.12.0-1~deb11u1 | vulnerable |
| bullseye (security) | 1:128.8.0esr-1~deb11u1 | fixed | |
| bookworm | 1:128.5.0esr-1~deb12u1 | vulnerable | |
| bookworm (security) | 1:128.8.0esr-1~deb12u1 | fixed | |
| sid, trixie | 1:128.8.0esr-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| thunderbird | source | bullseye | 1:128.8.0esr-1~deb11u1 | DLA-4081-1 | ||
| thunderbird | source | bookworm | 1:128.8.0esr-1~deb12u1 | DSA-5876-1 | ||
| thunderbird | source | (unstable) | 1:128.8.0esr-1 |
https://www.mozilla.org/en-US/security/advisories/mfsa2025-18/#CVE-2025-26695