Mimekit has vulnerable dependency that can lead to denial of service
Summary
Denial of service vulnerability.
Details
See: https://github.com/advisories/GHSA-447r-wph3-92pm and https://github.com/dotnet/announcements/issues/312
PoC
Update System.Security.Cryptography.Pkcs to 8.0.1 so that the transitive dependency with the issue gets updated
Impact
Denial of service vulnerability. Affects MimeKit (>= v3.0.0 and <= v4.7.0) when used to decrypt or verify incoming S/MIME messages as well as importing 3rd-party X.509 certificates for use with encrypting outgoing S/MIME messages.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| .NET (NuGet) | MimeKit | >= 3.0.0, < 4.7.1 | 4.7.1 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Weakness (CWE)
CWE-20- Platform
- .NET (NuGet)
- Package
MimeKit- Disclosed
- 11.07.2024
- Updated
- 11.10.2026 11:23
Sources and licenses
OSV / GitHub Advisory Database - GHSA-gmc6-fwg3-75m5 - CC BY 4.0
Vulnerability history: MimeKit
All published vulnerabilities of this package (.NET (NuGet)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 07.2024 03.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 1
Disclosures per year
- 2024: 1
- 2025: 0
- 2026: 1
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Mimekit has vulnerable dependency that can lead to denial of service this entry
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