CVE-2025-53366
HighAdvisory
Published 4 Jul 2025In the index since 8 Sept 2026
- Severity
- High
- worst across findings
- CVSS
- 8.7
- base score, highest
- EPSS
- 0.073
- 94th percentile
- CISA KEV
- Not listed
- no confirmed exploitation
- Charts affected
- 2
- of 17,781 indexed, latest versions
- Container images
- 2
- deployed by those charts
- Fix available
- 1 of 1
- affected package
MCP Python SDK vulnerability in the FastMCP Server causes validation error, leading to DoS
Carried by container images the latest versions of 2 of 17,781 indexed charts deploy, on 2 images.
| Affected package | Affected versions | Fixed in | Images |
|---|---|---|---|
| mcppypi | 1.1.2, 1.8.1 | 1.9.4 | 2 |
- OSV records
- GHSA-3qhf-m339-9g5v
- Also known as
- PYSEC-2026-1616
Charts affected
2 by stars
Container images carrying it
2 by charts deploying them
A fixed version is listed for 1 of the 1 affected package.
| Container image | Digest | Package | Fixed in | Used by |
|---|---|---|---|---|
| opencsghq/ | 2cd29671a03e | mcp | 1.9.4 | 1 |
| ghcr.io/ | 26c51e44d932 | mcp | 1.9.4 | 1 |