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.

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Advisories
Source ID Title
EUVD EUVD EUVD-2025-7705 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.
Ubuntu USN Ubuntu USN USN-7663-1 Thunderbird vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Mon, 13 Apr 2026 15:00:00 +0000

Type Values Removed Values Added
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. 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.
Title thunderbird: Downloading of OpenPGP keys from WKD used incorrect padding Downloading of OpenPGP keys from WKD used incorrect padding

Thu, 03 Apr 2025 14:00:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla
Mozilla thunderbird
Weaknesses NVD-CWE-noinfo
CPEs cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
Vendors & Products Mozilla
Mozilla thunderbird

Thu, 13 Mar 2025 02:00:00 +0000

Type Values Removed Values Added
Title thunderbird: Downloading of OpenPGP keys from WKD used incorrect padding
Weaknesses CWE-203
References
Metrics threat_severity

None

threat_severity

Low


Wed, 12 Mar 2025 19:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 10 Mar 2025 18:45:00 +0000

Type Values Removed Values Added
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.
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-04-13T14:27:29.612Z

Reserved: 2025-02-13T22:03:43.233Z

Link: CVE-2025-26695

cve-icon Vulnrichment

Updated: 2025-03-10T18:52:19.673Z

cve-icon NVD

Status : Modified

Published: 2025-03-10T19:15:40.567

Modified: 2026-04-13T15:16:54.780

Link: CVE-2025-26695

cve-icon Redhat

Severity : Low

Publid Date: 2025-03-10T18:41:25Z

Links: CVE-2025-26695 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses