Gpg4win: A Free Security Program for Windows
Gpg4win enables users to securely transport emails and files with the help of encryption and digital signatures. Encryption protects the contents against an unwanted party reading it. Digital signatures make sure that it was not modified and comes from a specific sender.
Gpg4win version 5.1.1 is available since 2026-09-23.
Changes
Kleopatra
Okular/GnuPG-edition
- Hide finish signing banner on document reload. (T8345)
Outlook Classic Add-In (GgpOL)
- Fix S/MIME handling. (T8436, T8439)
- Fix closing an open smime encrypted msg file creates mail in the inbox. (T8438)
- Fix Outlook crashes on preview of an S/MIME mail. (T8420)
- Fix getting the conformance string from libkleopatrarc. Also fixes a crash due C++ runtime error when reading libkleopatrarc. (T8421)
- Fix problem with MIME attachments w/o a Content-Disposition. (T8411)
- Fix minor memory leak.
- Mitigate slowness in switching between mails due to an Outlook regression. (T8418)
Outlook-New Add-In (GpgOL/Web)
Engine (GnuPG)
For changes in the backend see the release info for GnuPG versions from 2.5.22 up to 2.5.24: (T8425,T8320)
Versions of the Components
| Component | Version | Remarks |
| --------- | ------------- | ------- |
| GnuPG | 2.5.24 | T8425 |
| Kleopatra | gpg4win-5.1.0 | |
| GpgOL | 2.7.6 | |
| GpgEX | 1.1.2 | |
| Libgcrypt | 1.12.4 | T8417 |
| Libksba | 1.8.0 | |
| Publisher | The Gpg4win Project |
|---|---|
| Version | 5.1.1 |
| Release date | 2026-09-23 |
| License | GPL-2.0 |
| Installer type | nullsoft |
| Architecture | x64 |
| Package ID | GnuPG.Gpg4win |
Install Gpg4win from the command line with Windows Package Manager (winget):
winget install --id=GnuPG.Gpg4win -e
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