CVE-2023-46116
Remote Code Execution via insufficiently sanitized call to shell.openExternal
Tutanota (Tuta Mail) is an encrypted email provider. Tutanota allows users to open links in emails in external applications. Prior to version 3.118.12, it correctly blocks the file: URL scheme, which can be used by malicious actors to gain code execution on a victims computer, however fails to check other harmful schemes such as ftp:, smb:, etc. which can also be used. Successful exploitation of this vulnerability will enable an attacker to gain code execution on a victim's computer. Version 3.118.2 contains a patch for this issue.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
9.3
Remote Code Execution via insufficiently sanitized call to shell.openExternal
Tutanota (Tuta Mail) is an encrypted email provider. Tutanota allows users to open links in emails in external applications. Prior to version 3.118.12, it correctly blocks the file: URL scheme, which can be used by malicious actors to gain code execution on a victims computer, however fails to check other harmful schemes such as ftp:, smb:, etc. which can also be used. Successful exploitation of this vulnerability will enable an attacker to gain code execution on a victim's computer. Version 3.118.2 contains a patch for this issue.
- Record
CVE-2023-46116- CVSS 3.1
- 9.3 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N - Weakness
- CWE-20
- Updated
- 2026-11-02
EUVDEUVD-2023-50375
9.3
Tutanota (Tuta Mail) is an encrypted email provider. Tutanota allows users to open links in emails in external applications. Prior to version 3.118.12, it correctly blocks the file: URL scheme, which can be used by malicious actors to gain code execution on a victims computer, however fails to check other harmful schemes such as ftp:, smb:, etc. which can also be used. Successful exploitation of this vulnerability will enable an attacker to gain code execution on a victim's computer. Version 3.118.2 contains a patch for this issue.
- Record
EUVD-2023-50375- CVSS 3.1
- 9.3 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N - Updated
- 2026-11-03
NVD
9.3
Tutanota (Tuta Mail) is an encrypted email provider. Tutanota allows users to open links in emails in external applications. Prior to version 3.118.12, it correctly blocks the file: URL scheme, which can be used by malicious actors to gain code execution on a victims computer, however fails to check other harmful schemes such as ftp:, smb:, etc. which can also be used. Successful exploitation of this vulnerability will enable an attacker to gain code execution on a victim's computer. Version 3.118.2 contains a patch for this issue.
- Record
CVE-2023-46116- CVSS 3.1
- 9.3 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N - CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-20
- Updated
- 2026-11-02
OSV
9.3
Remote Code Execution via insufficiently sanitized call to shell.openExternal
Tutanota (Tuta Mail) is an encrypted email provider. Tutanota allows users to open links in emails in external applications. Prior to version 3.118.12, it correctly blocks the file: URL scheme, which can be used by malicious actors to gain code execution on a victims computer, however fails to check other harmful schemes such as ftp:, smb:, etc. which can also be used. Successful exploitation of this vulnerability will enable an attacker to gain code execution on a victim's computer. Version 3.118.2 contains a patch for this issue.
- Record
CVE-2023-46116- CVSS 3.1
- 9.3 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N - Weakness
- CWE-20
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-46116 is a critical vulnerability (CVSS 9.3) in Tuta Tutanota, published December 15, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.26%, the 69th percentile. No source names a fixed version.
References
github.com/tutao/tutanota/security/advisories/GHSA-mxgj-pq62-f644
github.com/tutao/tutanota/commit/88ecad17d00d05a722399aed35f0d280899d55a2
github.com/tutao/tutanota/blob/master/src/desktop/ApplicationWindow.ts
user-images.githubusercontent.com/46137338/270564886-7a0389d3-f9ef-44e1-9f5e-57ccc72dcaa8.mp4
github.com/CVEProject/cvelistV5/tree/main/cves/2023/46xxx/CVE-2023-46116.json
nvd.nist.gov/vuln/detail/CVE-2023-46116