CVE-2025-26695
Downloading of OpenPGP keys from WKD used incorrect padding
CVE-2025-26695 is fixed in 138 products on 2 platforms, first by Mozilla Thunderbird (af) 136.0, released March 4, 2025. It is not reported as exploited. Patch Radar priority: Routine.
RoutineFixed on 2 platforms
CVSS
5.3
Important
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0016
4th percentile
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Mozilla Thunderbird (af) | 136.0 | Mozilla Thunderbird (af) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (ar) | 136.0 | Mozilla Thunderbird (ar) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (ast) | 136.0 | Mozilla Thunderbird (ast) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (be) | 136.0 | Mozilla Thunderbird (be) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (bg) | 136.0 | Mozilla Thunderbird (bg) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (br) | 136.0 | Mozilla Thunderbird (br) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (ca) | 136.0 | Mozilla Thunderbird (ca) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (cs) | 136.0 | Mozilla Thunderbird (cs) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (cy) | 136.0 | Mozilla Thunderbird (cy) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (da) | 136.0 | Mozilla Thunderbird (da) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (de) | 136.0 | Mozilla Thunderbird (de) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (dsb) | 136.0 | Mozilla Thunderbird (dsb) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (el) | 136.0 | Mozilla Thunderbird (el) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (en-CA) | 136.0 | Mozilla Thunderbird (en-CA) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (en-GB) | 136.0 | Mozilla Thunderbird (en-GB) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (en-US) | 136.0 | Mozilla Thunderbird (en-US) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (es-AR) | 136.0 | Mozilla Thunderbird (es-AR) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (es-ES) | 136.0 | Mozilla Thunderbird (es-ES) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (es-MX) | 136.0 | Mozilla Thunderbird (es-MX) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (et) | 136.0 | Mozilla Thunderbird (et) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (eu) | 136.0 | Mozilla Thunderbird (eu) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (fi) | 136.0 | Mozilla Thunderbird (fi) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (fr) | 136.0 | Mozilla Thunderbird (fr) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (fy-NL) | 136.0 | Mozilla Thunderbird (fy-NL) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (ga-IE) | 136.0 | Mozilla Thunderbird (ga-IE) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (gd) | 136.0 | Mozilla Thunderbird (gd) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (gl) | 136.0 | Mozilla Thunderbird (gl) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (he) | 136.0 | Mozilla Thunderbird (he) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (hr) | 136.0 | Mozilla Thunderbird (hr) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (hsb) | 136.0 | Mozilla Thunderbird (hsb) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (hu) | 136.0 | Mozilla Thunderbird (hu) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (hy-AM) | 136.0 | Mozilla Thunderbird (hy-AM) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (id) | 136.0 | Mozilla Thunderbird (id) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (is) | 136.0 | Mozilla Thunderbird (is) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (it) | 136.0 | Mozilla Thunderbird (it) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (ja) | 136.0 | Mozilla Thunderbird (ja) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (ka) | 136.0 | Mozilla Thunderbird (ka) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (kab) | 136.0 | Mozilla Thunderbird (kab) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (kk) | 136.0 | Mozilla Thunderbird (kk) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (ko) | 136.0 | Mozilla Thunderbird (ko) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (lt) | 136.0 | Mozilla Thunderbird (lt) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (lv) | 136.0 | Mozilla Thunderbird (lv) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (ms) | 136.0 | Mozilla Thunderbird (ms) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (nb-NO) | 136.0 | Mozilla Thunderbird (nb-NO) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (nl) | 136.0 | Mozilla Thunderbird (nl) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (nn-NO) | 136.0 | Mozilla Thunderbird (nn-NO) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (pa-IN) | 136.0 | Mozilla Thunderbird (pa-IN) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (pl) | 136.0 | Mozilla Thunderbird (pl) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (pt-BR) | 136.0 | Mozilla Thunderbird (pt-BR) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (pt-PT) | 136.0 | Mozilla Thunderbird (pt-PT) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (rm) | 136.0 | Mozilla Thunderbird (rm) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (ro) | 136.0 | Mozilla Thunderbird (ro) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (ru) | 136.0 | Mozilla Thunderbird (ru) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (sk) | 136.0 | Mozilla Thunderbird (sk) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (sl) | 136.0 | Mozilla Thunderbird (sl) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (sq) | 136.0 | Mozilla Thunderbird (sq) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (sr) | 136.0 | Mozilla Thunderbird (sr) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (sv-SE) | 136.0 | Mozilla Thunderbird (sv-SE) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (th) | 136.0 | Mozilla Thunderbird (th) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (tr) | 136.0 | Mozilla Thunderbird (tr) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (uk) | 136.0 | Mozilla Thunderbird (uk) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (uz) | 136.0 | Mozilla Thunderbird (uz) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (vi) | 136.0 | Mozilla Thunderbird (vi) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (zh-CN) | 136.0 | Mozilla Thunderbird (zh-CN) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird (zh-TW) | 136.0 | Mozilla Thunderbird (zh-TW) 136.0 | Mar 4, 2025 |
| Mozilla Thunderbird ESR (af) | 128.8.0 | Mozilla Thunderbird ESR (af) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (ar) | 128.8.0 | Mozilla Thunderbird ESR (ar) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (ast) | 128.8.0 | Mozilla Thunderbird ESR (ast) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (be) | 128.8.0 | Mozilla Thunderbird ESR (be) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (bg) | 128.8.0 | Mozilla Thunderbird ESR (bg) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (br) | 128.8.0 | Mozilla Thunderbird ESR (br) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (ca) | 128.8.0 | Mozilla Thunderbird ESR (ca) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (cak) | 128.8.0 | Mozilla Thunderbird ESR (cak) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (cs) | 128.8.0 | Mozilla Thunderbird ESR (cs) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (cy) | 128.8.0 | Mozilla Thunderbird ESR (cy) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (da) | 128.8.0 | Mozilla Thunderbird ESR (da) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (de) | 128.8.0 | Mozilla Thunderbird ESR (de) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (dsb) | 128.8.0 | Mozilla Thunderbird ESR (dsb) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (el) | 128.8.0 | Mozilla Thunderbird ESR (el) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (en-CA) | 128.8.0 | Mozilla Thunderbird ESR (en-CA) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (en-GB) | 128.8.0 | Mozilla Thunderbird ESR (en-GB) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (en-US) | 128.8.0 | Mozilla Thunderbird ESR (en-US) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (es-AR) | 128.8.0 | Mozilla Thunderbird ESR (es-AR) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (es-ES) | 128.8.0 | Mozilla Thunderbird ESR (es-ES) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (es-MX) | 128.8.0 | Mozilla Thunderbird ESR (es-MX) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (et) | 128.8.0 | Mozilla Thunderbird ESR (et) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (eu) | 128.8.0 | Mozilla Thunderbird ESR (eu) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (fi) | 128.8.0 | Mozilla Thunderbird ESR (fi) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (fr) | 128.8.0 | Mozilla Thunderbird ESR (fr) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (fy-NL) | 128.8.0 | Mozilla Thunderbird ESR (fy-NL) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (ga-IE) | 128.8.0 | Mozilla Thunderbird ESR (ga-IE) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (gd) | 128.8.0 | Mozilla Thunderbird ESR (gd) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (gl) | 128.8.0 | Mozilla Thunderbird ESR (gl) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (he) | 128.8.0 | Mozilla Thunderbird ESR (he) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (hr) | 128.8.0 | Mozilla Thunderbird ESR (hr) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (hsb) | 128.8.0 | Mozilla Thunderbird ESR (hsb) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (hu) | 128.8.0 | Mozilla Thunderbird ESR (hu) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (hy-AM) | 128.8.0 | Mozilla Thunderbird ESR (hy-AM) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (id) | 128.8.0 | Mozilla Thunderbird ESR (id) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (is) | 128.8.0 | Mozilla Thunderbird ESR (is) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (it) | 128.8.0 | Mozilla Thunderbird ESR (it) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (ja) | 128.8.0 | Mozilla Thunderbird ESR (ja) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (ka) | 128.8.0 | Mozilla Thunderbird ESR (ka) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (kab) | 128.8.0 | Mozilla Thunderbird ESR (kab) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (kk) | 128.8.0 | Mozilla Thunderbird ESR (kk) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (ko) | 128.8.0 | Mozilla Thunderbird ESR (ko) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (lt) | 128.8.0 | Mozilla Thunderbird ESR (lt) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (lv) | 128.8.0 | Mozilla Thunderbird ESR (lv) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (ms) | 128.8.0 | Mozilla Thunderbird ESR (ms) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (nb-NO) | 128.8.0 | Mozilla Thunderbird ESR (nb-NO) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (nl) | 128.8.0 | Mozilla Thunderbird ESR (nl) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (nn-NO) | 128.8.0 | Mozilla Thunderbird ESR (nn-NO) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (pa-IN) | 128.8.0 | Mozilla Thunderbird ESR (pa-IN) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (pl) | 128.8.0 | Mozilla Thunderbird ESR (pl) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (pt-BR) | 128.8.0 | Mozilla Thunderbird ESR (pt-BR) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (pt-PT) | 128.8.0 | Mozilla Thunderbird ESR (pt-PT) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (rm) | 128.8.0 | Mozilla Thunderbird ESR (rm) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (ro) | 128.8.0 | Mozilla Thunderbird ESR (ro) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (ru) | 128.8.0 | Mozilla Thunderbird ESR (ru) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (sk) | 128.8.0 | Mozilla Thunderbird ESR (sk) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (sl) | 128.8.0 | Mozilla Thunderbird ESR (sl) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (sq) | 128.8.0 | Mozilla Thunderbird ESR (sq) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (sr) | 128.8.0 | Mozilla Thunderbird ESR (sr) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (sv-SE) | 128.8.0 | Mozilla Thunderbird ESR (sv-SE) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (th) | 128.8.0 | Mozilla Thunderbird ESR (th) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (tr) | 128.8.0 | Mozilla Thunderbird ESR (tr) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (uk) | 128.8.0 | Mozilla Thunderbird ESR (uk) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (uz) | 128.8.0 | Mozilla Thunderbird ESR (uz) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (vi) | 128.8.0 | Mozilla Thunderbird ESR (vi) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (zh-CN) | 128.8.0 | Mozilla Thunderbird ESR (zh-CN) 128.8.0 | Mar 5, 2025 |
| Mozilla Thunderbird ESR (zh-TW) | 128.8.0 | Mozilla Thunderbird ESR (zh-TW) 128.8.0 | Mar 5, 2025 |
| Linux | |||
| MozillaThunderbird · opensuse-leap 15.6 | 128.8.0-150200.8.203.1 | SUSE-SU-2025:0849-1 | Mar 12, 2025 |
| MozillaThunderbird · sles 15.6 | 128.8.0-150200.8.203.1 | SUSE-SU-2025:0849-1 | Mar 12, 2025 |
| thunderbird · Debian 12.15 (bookworm) | 1:128.8.0esr-1~deb12u1 | DEBIAN-CVE-2025-26695 | Mar 10, 2025 |
| thunderbird · Debian 13.5 (trixie) | 1:128.8.0esr-1 | DEBIAN-CVE-2025-26695 | Mar 10, 2025 |
| thunderbird · Debian 14 | 1:128.8.0esr-1 | DEBIAN-CVE-2025-26695 | Mar 10, 2025 |
| thunderbird · RHEL 8 | 0:128.8.0-2.el8_10 | RHSA-2025:2900 | Mar 17, 2025 |
| thunderbird · RHEL 9 | 0:128.8.0-2.el9_5 | RHSA-2025:2899 | Mar 17, 2025 |
| thunderbird · Ubuntu 22.04.1 LTS (jammy) | 1:128.12.0+build1-0ubuntu0.22.04.1 | thunderbird 1:128.12.0+build1-0ubuntu0.22.04.1 | Jun 24, 2025 |
| thunderbird · almalinux 8 | 128.8.0-2.el8_10.alma.1 | ALSA-2025:2900 | Mar 17, 2025 |
| thunderbird-gnome-support · Ubuntu 22.04.1 LTS (jammy) | 1:128.12.0+build1-0ubuntu0.22.04.1 | thunderbird-gnome-support 1:128.12.0+build1-0ubuntu0.22.04.1 | Jun 24, 2025 |
| thunderbird-mozsymbols · Ubuntu 22.04.1 LTS (jammy) | 1:128.12.0+build1-0ubuntu0.22.04.1 | thunderbird-mozsymbols 1:128.12.0+build1-0ubuntu0.22.04.1 | Jun 24, 2025 |
| xul-ext-calendar-timezones · Ubuntu 22.04.1 LTS (jammy) | 1:128.12.0+build1-0ubuntu0.22.04.1 | xul-ext-calendar-timezones 1:128.12.0+build1-0ubuntu0.22.04.1 | Jun 24, 2025 |
| xul-ext-gdata-provider · Ubuntu 22.04.1 LTS (jammy) | 1:128.12.0+build1-0ubuntu0.22.04.1 | xul-ext-gdata-provider 1:128.12.0+build1-0ubuntu0.22.04.1 | Jun 24, 2025 |
| xul-ext-lightning · Ubuntu 22.04.1 LTS (jammy) | 1:128.12.0+build1-0ubuntu0.22.04.1 | xul-ext-lightning 1:128.12.0+build1-0ubuntu0.22.04.1 | Jun 24, 2025 |
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