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Github Security Blog
Github Security Blog
added 2026/08/25 3:41 p.m.14 views

mcp-shell has a Secure Mode Allowlist Bypass via Default `/bin/bash` Executable

Summary mcp-shell ships a default Docker configuration security.yaml that includes /bin/bash in the allowedexecutables allowlist. The command validator security.go only checks whether the first token of the supplied command matches an allowed executable; it does not inspect or reject shell...

8.4CVSS6.4AI score0.0034EPSS
SaveExploits0References5Affected Software1
Cvelist
Cvelist
added 2026/08/25 3:40 p.m.50 views

CVE-2026-55581 mcp-shell: Secure Mode Allowlist Bypass via Default `/bin/bash` Executable

mcp-shell is an MCP server for running shell commands securely, auditably, and on demand. Prior to 0.6.0, the default Docker security.yaml includes /bin/bash in allowedexecutables, while security.go validates only the first token and checkBlockedPatternsAndCommands does not reject the shell...

8.4CVSS0.0034EPSS
SaveExploits0References4
CVE
CVE
added 2026/08/25 3:40 p.m.48 views

CVE-2026-55581

mcp-shell is an MCP server for running shell commands securely. Prior to 0.6.0 , the default Docker security.yaml includes /bin/bash in allowed_executables, while security.go validates only the first token and checkBlockedPatternsAndCommands does not reject the shell -c flag. A caller of the shel...

8.4CVSS5.8AI score0.0034EPSS
SaveExploits0References4
OSV
OSV
added 2026/08/25 3:40 p.m.14 views

CVE-2026-55581 mcp-shell: Secure Mode Allowlist Bypass via Default `/bin/bash` Executable

mcp-shell is an MCP server for running shell commands securely, auditably, and on demand. Prior to 0.6.0, the default Docker security.yaml includes /bin/bash in allowedexecutables, while security.go validates only the first token and checkBlockedPatternsAndCommands does not reject the shell...

8.4CVSS6AI score
SaveExploits0References6
EUVD
EUVD
added 2026/08/25 3:40 p.m.17 views

EUVD-2026-65549

mcp-shell is an MCP server for running shell commands securely, auditably, and on demand. Prior to 0.6.0, the default Docker security.yaml includes /bin/bash in allowedexecutables, while security.go validates only the first token and checkBlockedPatternsAndCommands does not reject the shell...

8.4CVSS5.8AI score0.0034EPSS
SaveExploits0References4
Github Security Blog
Github Security Blog
added 2026/08/25 3:39 p.m.25 views

mcp-shell has a Secure Mode Allowlist Bypass via Git Shell Alias

Summary mcp-shell's "secure mode" is designed to restrict command execution to an allowlist of executables defined in security.yaml. The default configuration includes /usr/bin/git. The security validator in security.go blocks common shell metacharacters |&;$\ but omits !, which is the prefix Git...

8.4CVSS6.6AI score0.00193EPSS
SaveExploits0References5Affected Software1
OSV
OSV
added 2026/08/25 3:39 p.m.8 views

GHSA-74HP-MGGR-HV58 mcp-shell has a Secure Mode Allowlist Bypass via Git Shell Alias

Summary mcp-shell's "secure mode" is designed to restrict command execution to an allowlist of executables defined in security.yaml. The default configuration includes /usr/bin/git. The security validator in security.go blocks common shell metacharacters |&;$\ but omits !, which is the prefix Git...

8.4CVSS6.8AI score0.00193EPSS
SaveExploits0References5
OSV
OSV
added 2026/08/25 3:37 p.m.15 views

CVE-2026-55582 mcp-shell: Secure Mode Allowlist Bypass via Git Shell Alias

mcp-shell is an MCP server for running shell commands securely, auditably, and on demand. Prior to 0.6.0, the default security.yaml allows /usr/bin/git, while security.go omits ! from containsShellMetacharacters and containsDangerousShellConstructs and applies no per-executable argument policy. A...

8.4CVSS6.2AI score
SaveExploits0References6
EUVD
EUVD
added 2026/08/25 3:37 p.m.10 views

EUVD-2026-65548

mcp-shell is an MCP server for running shell commands securely, auditably, and on demand. Prior to 0.6.0, the default security.yaml allows /usr/bin/git, while security.go omits ! from containsShellMetacharacters and containsDangerousShellConstructs and applies no per-executable argument policy. A...

8.4CVSS5.9AI score0.00193EPSS
SaveExploits0References4
CVE
CVE
added 2026/08/25 3:37 p.m.28 views

CVE-2026-55582

mcp-shell is an MCP server for running shell commands securely. Prior to 0.6.0 , the default security.yaml allows /usr/bin/git, while security.go omits the ! character from its shell-metacharacter and dangerous-construct checks and applies no per-executable argument policy. A caller of the shell_...

8.4CVSS5.9AI score0.00193EPSS
SaveExploits0References4
Cvelist
Cvelist
added 2026/08/25 3:37 p.m.34 views

CVE-2026-55582 mcp-shell: Secure Mode Allowlist Bypass via Git Shell Alias

mcp-shell is an MCP server for running shell commands securely, auditably, and on demand. Prior to 0.6.0, the default security.yaml allows /usr/bin/git, while security.go omits ! from containsShellMetacharacters and containsDangerousShellConstructs and applies no per-executable argument policy. A...

8.4CVSS0.00193EPSS
SaveExploits0References4
OSV
OSV
added 2026/08/25 3:26 p.m.6 views

GHSA-MW6R-2HVM-4RP2 qwed-mcp has Unsafe SymPy `parse_expr()` Remote Code Execution via Unsanitized Math Expression Input

Summary verifymathexpression in qwed-mcp v0.2.0 passes attacker-controlled strings directly to SymPy's parseexpr without restricting globaldict or validating the expression's AST. Because parseexpr internally calls eval and Python automatically injects the current module's builtins when no explic...

9.8CVSS6.8AI score0.0041EPSS
SaveExploits0References5
Github Security Blog
Github Security Blog
added 2026/08/25 3:26 p.m.13 views

qwed-mcp has Unsafe SymPy `parse_expr()` Remote Code Execution via Unsanitized Math Expression Input

Summary verifymathexpression in qwed-mcp v0.2.0 passes attacker-controlled strings directly to SymPy's parseexpr without restricting globaldict or validating the expression's AST. Because parseexpr internally calls eval and Python automatically injects the current module's builtins when no explic...

9.8CVSS6.7AI score0.0041EPSS
SaveExploits0References5Affected Software1
EUVD
EUVD
added 2026/08/25 3:25 p.m.13 views

EUVD-2026-65547

QWED-MCP is a deterministic verification gateway for MCP. Prior to 0.2.1, verifymathexpression in src/qwedmcp/engines/mathengine.py passes attacker-controlled expression and claimedresult strings directly to SymPy's parseexpr after only normalizing caret syntax to Python exponent syntax, without...

9.8CVSS5.9AI score0.0041EPSS
SaveExploits0References4
OSV
OSV
added 2026/08/25 3:25 p.m.21 views

CVE-2026-55546 QWED-MCP: Unsafe SymPy `parse_expr()` Remote Code Execution via Unsanitized Math Expression Input

QWED-MCP is a deterministic verification gateway for MCP. Prior to 0.2.1, verifymathexpression in src/qwedmcp/engines/mathengine.py passes attacker-controlled expression and claimedresult strings directly to SymPy's parseexpr after only normalizing caret syntax to Python exponent syntax, without...

9.8CVSS6.1AI score
SaveExploits0References6
CVE
CVE
added 2026/08/25 3:25 p.m.32 views

CVE-2026-55546

QWED-MCP (a deterministic verification gateway for MCP) is affected by a Critical (CVSS 9.8) remote code execution vulnerability in verify_math_expression() within src/qwed_mcp/engines/math_engine.py. Attacker-controlled expression strings are passed directly to SymPy's parse_expr() without restr...

9.8CVSS5.9AI score0.0041EPSS
SaveExploits0References4
Cvelist
Cvelist
added 2026/08/25 3:25 p.m.35 views

CVE-2026-55546 QWED-MCP: Unsafe SymPy `parse_expr()` Remote Code Execution via Unsanitized Math Expression Input

QWED-MCP is a deterministic verification gateway for MCP. Prior to 0.2.1, verifymathexpression in src/qwedmcp/engines/mathengine.py passes attacker-controlled expression and claimedresult strings directly to SymPy's parseexpr after only normalizing caret syntax to Python exponent syntax, without...

9.8CVSS0.0041EPSS
SaveExploits0References4
OSV
OSV
added 2026/08/25 3:18 p.m.7 views

GHSA-PVPH-5J39-V8QC PraisonAI: Origin-validation bypass (startswith prefix match) enables unauthenticated cross-site request forgery against the PraisonAI MCP HTTP server

Summary The PraisonAI MCP server exposes an HTTP-stream transport praisonai mcp serve --transport http-stream that binds to localhost and, by default, has no API key. Its only access control for browser-originated requests is an Origin allowlist, which the code implements as required by the MCP...

7.6CVSS5.7AI score0.00128EPSS
SaveExploits0References4
EUVD
EUVD
added 2026/08/25 3:17 p.m.13 views

EUVD-2026-65544

PraisonAI is a multi-agent teams system. Prior to praisonai 4.6.58, MCP HTTP Stream validateorigin uses requestorigin.startswithallowed, allowing the attacker-controlled localhost.attacker.com HTTP origin to satisfy the localhost allowlist. A webpage can send Content-Type: text/plain requests...

7.6CVSS5.3AI score0.00128EPSS
SaveExploits0References3
OSV
OSV
added 2026/08/25 3:17 p.m.12 views

CVE-2026-55532 PraisonAI: Origin-validation bypass (startswith prefix match) enables unauthenticated cross-site request forgery against the PraisonAI MCP HTTP server

PraisonAI is a multi-agent teams system. Prior to praisonai 4.6.58, MCP HTTP Stream validateorigin uses requestorigin.startswithallowed, allowing the attacker-controlled localhost.attacker.com HTTP origin to satisfy the localhost allowlist. A webpage can send Content-Type: text/plain requests...

7.6CVSS5.5AI score
SaveExploits0References5
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