CVE-2026-50527
Description
- CVE ID
- CVE-2026-50527
- Package
- System.Security.Cryptography.Xml
- CVE severity
- High
- EPPlus impact
- Low
Affected EPPlus Versions
8.0.1 – 8.6.2
Status
fix-available — A fix is available. See advisory for details.
Advisory
Microsoft has released a security fix for a denial of service vulnerability (CVE-2026-50527) in System.Security.Cryptography.Xml, addressed in versions 8.0.4, 9.0.18 and 10.0.10. EPPlus uses this package to create and validate digital signatures for workbooks. The risk for EPPlus users is considered very low, as EPPlus does not expose any way for an external attacker to control the input passed to the affected library. The package is only used to process workbooks that the EPPlus user has either created themselves or chosen to open as trusted.
Update to EPPlus 8.6.3 to resolve this issue.
Package Fix Information
This information refers to the upstream package (System.Security.Cryptography.Xml), not EPPlus. See the advisory above for EPPlus-specific guidance.
| Target framework | Package version | Fix state | Fixed in version |
|---|---|---|---|
| net8.0 | 9.0.15 | fixed | 9.0.18 |
| net8.0 | 8.0.3 | fixed | 8.0.4 |
| net8.0 | 8.0.2 | fixed | 8.0.4 |
| net9.0 | 9.0.3 | fixed | 9.0.18 |
| net9.0 | 9.0.15 | fixed | 9.0.18 |
| net10.0 | 10.0.0 | fixed | 10.0.10 |
| net10.0 | 10.0.7 | fixed | 10.0.10 |
| net10.0 | 10.0.6 | fixed | 10.0.10 |
| net462 | 9.0.15 | fixed | 9.0.18 |
| net462 | 8.0.2 | fixed | 8.0.4 |
| net462 | 8.0.3 | fixed | 8.0.4 |
| netstandard2.0 | 8.0.2 | fixed | 8.0.4 |
| netstandard2.0 | 9.0.15 | fixed | 9.0.18 |
| netstandard2.0 | 8.0.3 | fixed | 8.0.4 |
| netstandard2.1 | 9.0.15 | fixed | 9.0.18 |
| netstandard2.1 | 8.0.3 | fixed | 8.0.4 |
| netstandard2.1 | 8.0.2 | fixed | 8.0.4 |
Timeline
- First detected
- 2026-07-23
- Last updated
- 2026-07-24