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Github Security Blog
Github Security Blog
added 2026/08/25 3:39 p.m.21 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.5 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
Vulnrichment
Vulnrichment
added 2026/08/25 3:37 p.m.10 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...

8.4CVSS6AI score0.00193EPSS
SaveExploits0References4
OSV
OSV
added 2026/08/25 3:37 p.m.9 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
Cvelist
Cvelist
added 2026/08/25 3:37 p.m.29 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
EUVD
EUVD
added 2026/08/25 3:37 p.m.8 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.26 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
OSV
OSV
added 2026/08/25 3:36 p.m.0 views

CGA-52XC-C88V-97Q5

Bulletin has no description...

8.4CVSS0.00367EPSS
SaveExploits1References5
OSV
OSV
added 2026/08/25 3:32 p.m.1 views

CGA-9R6P-JMQG-98FR

Bulletin has no description...

8.4CVSS7.2AI score0.00367EPSS
SaveExploits1References5
OSV
OSV
added 2026/08/25 3:30 p.m.1 views

CGA-PCJ2-R99R-CJ57

Bulletin has no description...

8.4CVSS7.2AI score0.00367EPSS
SaveExploits1References5
OSV
OSV
added 2026/08/25 3:26 p.m.5 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.9 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
OSV
OSV
added 2026/08/25 3:24 p.m.0 views

CGA-H7RQ-PXPM-RGQC

Bulletin has no description...

8.4CVSS7.2AI score0.00367EPSS
SaveExploits1References5
OSV
OSV
added 2026/08/25 3:22 p.m.1 views

CGA-MQRJ-95HF-9P92

Bulletin has no description...

8.4CVSS7.2AI score0.00367EPSS
SaveExploits1References5
OSV
OSV
added 2026/08/25 3:21 p.m.2 views

CGA-JRW5-V7V3-J873

Bulletin has no description...

8.4CVSS7.2AI score0.00367EPSS
SaveExploits1References5
OSV
OSV
added 2026/08/25 3:20 p.m.0 views

CGA-PQMW-2H7H-FCWX

Bulletin has no description...

8.4CVSS7.1AI score0.00367EPSS
SaveExploits1References5
Cvelist
Cvelist
added 2026/08/25 3:16 p.m.27 views

CVE-2026-79769 Nokogiri before 1.19.4 Invalid Memory Read via initialize_copy_with_args

Nokogiri versions before 1.19.4 contain a possible invalid out-of-bounds memory read in the protected internal Nodeinitializecopywithargs helper behind Nodedup and clone, which unwrapped its source argument as an xmlNode without a type check. If application code calls this protected method with a...

8.7CVSS0.00181EPSS
SaveExploits0References2
OSV
OSV
added 2026/08/25 3:16 p.m.8 views

CVE-2026-79769 Nokogiri before 1.19.4 Invalid Memory Read via initialize_copy_with_args

Nokogiri versions before 1.19.4 contain a possible invalid out-of-bounds memory read in the protected internal Nodeinitializecopywithargs helper behind Nodedup and clone, which unwrapped its source argument as an xmlNode without a type check. If application code calls this protected method with a...

8.7CVSS5.5AI score
SaveExploits0References4
EUVD
EUVD
added 2026/08/25 3:16 p.m.11 views

EUVD-2026-65527

Nokogiri versions before 1.19.4 contain a possible invalid out-of-bounds memory read in the protected internal Nodeinitializecopywithargs helper behind Nodedup and clone, which unwrapped its source argument as an xmlNode without a type check. If application code calls this protected method with a...

8.7CVSS5.3AI score0.00181EPSS
SaveExploits0References2
CVE
CVE
added 2026/08/25 3:16 p.m.16 views

CVE-2026-79769

Nokogiri (Ruby gem) versions before 1.19.4 contain an out-of-bounds memory read in the protected internal method Node#initialize_copy_with_args , which unwraps its source argument as an xmlNode without a type check. If application code calls this method with a non-Node argument (e.g., a Namespace...

8.7CVSS5.3AI score0.00181EPSS
SaveExploits0References2
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