MCP Calculate Server: Prompt Injection to RCE
Priority MEDIUM 49CWE-1427Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-94.
Summary
MCP Calculate Server is a mathematical calculation service based on MCP protocol and SymPy library. Prior to 0.1.1, the use of eval() to evaluate mathematical expressions without proper input sanitization leads to remote code execution. This vulnerability is fixed in 0.1.1.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00478 41st percentileScored 2026-11-07
Fix Fixed mcp_calculate_server (611711Dark): 0.1.1
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| 611711Dark | mcp_calculate_server | before 0.1.1 | 0.1.1 | Patch available | CNA |
- mcp_calculate_server Vendor611711Dark Affected before 0.1.1 Fixed in 0.1.1 Patch available CNA
Remediation
- Fix · CNA mcp_calculate_server (611711Dark) Fixed in 0.1.1
Timeline
- 2026-10-02 Threatist record created from CVE-2026-44717
- 2026-10-25 EPSS moved to the below the 50th percentile
References
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences