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| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-mw6r-2hvm-4rp2 | qwed-mcp has Unsafe SymPy `parse_expr()` Remote Code Execution via Unsanitized Math Expression Input |
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
Tue, 25 Aug 2026 19:30:00 +0000
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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Tue, 25 Aug 2026 15:30:00 +0000
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| Description | QWED-MCP is a deterministic verification gateway for MCP. Prior to 0.2.1, verify_math_expression() in src/qwed_mcp/engines/math_engine.py passes attacker-controlled expression and claimed_result strings directly to SymPy's parse_expr() after only normalizing caret syntax to Python exponent syntax, without restricting global_dict, removing Python built-ins, or validating the expression AST. Because parse_expr() calls Python's eval() with built-ins available, an attacker who can cause a downstream caller to pass untrusted input to this public library function can use Python import functionality to execute arbitrary operating-system commands as the qwed-mcp process user, read or modify accessible data, exfiltrate process secrets, or reach internal services. The default MCP tool registry does not expose verify_math_expression(), so exploitation requires a downstream integration that invokes the library API with attacker-controlled input. This issue is fixed in version 0.2.1. | |
| Title | QWED-MCP: Unsafe SymPy `parse_expr()` Remote Code Execution via Unsanitized Math Expression Input | |
| Weaknesses | CWE-94 | |
| References |
| |
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-08-25T18:26:44.049Z
Reserved: 2026-06-16T23:01:04.075Z
Link: CVE-2026-55546
Updated: 2026-08-25T18:26:15.880Z
Status : Received
Published: 2026-08-25T16:16:55.160
Modified: 2026-08-25T19:16:49.683
Link: CVE-2026-55546
No data.
OpenCVE Enrichment
Updated: 2026-08-25T16:45:04Z
Github GHSA