GHSA-gmc6-fwg3-75m5
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
What each source reports
GitHub Advisories Score used
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.
- Record
GHSA-gmc6-fwg3-75m5- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-20
- Updated
- 2026-11-02
OSV
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.
- Record
GHSA-gmc6-fwg3-75m5- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-20
- Updated
- 2026-11-02
Affected packages
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | GitHub Advisories, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
GHSA-gmc6-fwg3-75m5 is a high vulnerability (CVSS 8.7) in MimeKit, published July 11, 2024. No source lists public exploit code. Fixed in MimeKit 4.7.1.