{"items":[{"id":"NVI-00011801","kind":"vulnerability","title":"mcp-contextforge-gateway has RestrictedPython sandbox bypass via getattr builtin in python_sandbox_server","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-xm98-3vcf-fph7","CVE-2026-53710"],"plain_summary":"GitHub lists this reviewed advisory for mcp-contextforge-gateway. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-0aba81abcd6c4a9d5e5391a728379042"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-10-15T01:07:05.000Z","value":"10 critical","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-317b0295b686a371e427b70e7a63f51d"},{"kind":"CVSS","as_of":"2026-09-30T17:51:56.193Z","value":"10 CRITICAL (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-425977e576a5aed112e771c7079b790f"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"1.141%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.66675. Missing scores are unknown.","source_id":"sr-0aba81abcd6c4a9d5e5391a728379042"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-317b0295b686a371e427b70e7a63f51d","url":"https://github.com/advisories/GHSA-xm98-3vcf-fph7","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-xm98-3vcf-fph7","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T23:14:22.124Z"},{"id":"sr-425977e576a5aed112e771c7079b790f","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53710","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-53710","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-03T22:35:42.883Z"},{"id":"sr-0aba81abcd6c4a9d5e5391a728379042","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-53710","publisher":"FIRST EPSS","observed_at":"2026-11-01T01:39:43.081Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-317b0295b686a371e427b70e7a63f51d"],"technology":"mcp-contextforge-gateway","known_exclusions":[],"conditions_summary":"**Commit:** `f855e54d5b7bc1c91b977574a03b91eff6b86bb6`\n**Component:** `mcp-servers/python/python_sandbox_server/src/python_sandbox_server/server_fastmcp.py`\n\n## Vulnerability\n\nRestrictedPython's sandbox in ContextForge's `python_sandbox_server` sub-project allows arbitrary Python execution via three compounding weaknesses:\n\n1. Raw `getattr` is exposed in `safe_builtins`, bypassing `_getattr_` mediation.\n2. `validate_code` checks for literal dangerous dunder strings, but the payload constructs those names at runtime.\n3. The `execute_code` MCP tool can be exposed over HTTP/SSE transport with no authentication layer.\n\n## Proof of Concept\n\nThe local PoC was executed against the real pinned sandbox code path. It constructs dunder names at runtime, walks Python's class hierarchy through the exposed `getattr`, finds `subprocess.Popen`, and executes a harmless marker command.\n\nTranscript excerpt:\n\n```text\nPOC: IBM/mcp-context-forge RestrictedPython getattr sandbox bypass\nvalidation={'valid': True, 'message': 'Code passed validation', 'warnings': None}\nsuccess=True\nstdout=\"FOUND_POPEN\\nb'IBM_SANDBOX_POC_PASS'\\n\"\nIBM_RESTRICTEDPYTHON_GETATTR_POPEN_REPRO_PASS\n```\n\nPoC artifact hashes:\n\n```tex","public_affected_ranges":["<= 1.0.1"]}],"null_published_at":"2026-11-04T10:04:35.943Z","source_updated_at":"2026-10-15T01:07:05.000Z","source_disclosed_at":"2026-08-24T19:20:58.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T23:14:22.124Z"},{"id":"NVI-00011801","kind":"vulnerability","title":"mcp-contextforge-gateway has RestrictedPython sandbox bypass via getattr builtin in python_sandbox_server","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-xm98-3vcf-fph7","CVE-2026-53710"],"plain_summary":"GitHub lists this reviewed advisory for mcp-contextforge-gateway. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-0aba81abcd6c4a9d5e5391a728379042"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-10-15T01:07:05.000Z","value":"10 critical","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-317b0295b686a371e427b70e7a63f51d"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"1.141%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.66675. Missing scores are unknown.","source_id":"sr-0aba81abcd6c4a9d5e5391a728379042"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-317b0295b686a371e427b70e7a63f51d","url":"https://github.com/advisories/GHSA-xm98-3vcf-fph7","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-xm98-3vcf-fph7","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T23:14:22.124Z"},{"id":"sr-0aba81abcd6c4a9d5e5391a728379042","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-53710","publisher":"FIRST EPSS","observed_at":"2026-11-01T01:39:43.081Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-317b0295b686a371e427b70e7a63f51d"],"technology":"mcp-contextforge-gateway","known_exclusions":[],"conditions_summary":"**Commit:** `f855e54d5b7bc1c91b977574a03b91eff6b86bb6`\n**Component:** `mcp-servers/python/python_sandbox_server/src/python_sandbox_server/server_fastmcp.py`\n\n## Vulnerability\n\nRestrictedPython's sandbox in ContextForge's `python_sandbox_server` sub-project allows arbitrary Python execution via three compounding weaknesses:\n\n1. Raw `getattr` is exposed in `safe_builtins`, bypassing `_getattr_` mediation.\n2. `validate_code` checks for literal dangerous dunder strings, but the payload constructs those names at runtime.\n3. The `execute_code` MCP tool can be exposed over HTTP/SSE transport with no authentication layer.\n\n## Proof of Concept\n\nThe local PoC was executed against the real pinned sandbox code path. It constructs dunder names at runtime, walks Python's class hierarchy through the exposed `getattr`, finds `subprocess.Popen`, and executes a harmless marker command.\n\nTranscript excerpt:\n\n```text\nPOC: IBM/mcp-context-forge RestrictedPython getattr sandbox bypass\nvalidation={'valid': True, 'message': 'Code passed validation', 'warnings': None}\nsuccess=True\nstdout=\"FOUND_POPEN\\nb'IBM_SANDBOX_POC_PASS'\\n\"\nIBM_RESTRICTEDPYTHON_GETATTR_POPEN_REPRO_PASS\n```\n\nPoC artifact hashes:\n\n```tex","public_affected_ranges":["<= 1.0.1"]}],"null_published_at":"2026-11-01T14:34:14.095Z","source_updated_at":"2026-10-15T01:07:05.000Z","source_disclosed_at":"2026-08-24T19:20:58.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-10-31T23:14:22.124Z"},{"id":"NVI-00011801","kind":"vulnerability","title":"mcp-contextforge-gateway has RestrictedPython sandbox bypass via getattr builtin in python_sandbox_server","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-xm98-3vcf-fph7","CVE-2026-53710"],"plain_summary":"GitHub lists this reviewed advisory for mcp-contextforge-gateway. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-317b0295b686a371e427b70e7a63f51d"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-10-15T01:07:05.000Z","value":"10 critical","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-317b0295b686a371e427b70e7a63f51d"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-317b0295b686a371e427b70e7a63f51d","url":"https://github.com/advisories/GHSA-xm98-3vcf-fph7","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-xm98-3vcf-fph7","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T23:14:22.124Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-317b0295b686a371e427b70e7a63f51d"],"technology":"mcp-contextforge-gateway","known_exclusions":[],"conditions_summary":"**Commit:** `f855e54d5b7bc1c91b977574a03b91eff6b86bb6`\n**Component:** `mcp-servers/python/python_sandbox_server/src/python_sandbox_server/server_fastmcp.py`\n\n## Vulnerability\n\nRestrictedPython's sandbox in ContextForge's `python_sandbox_server` sub-project allows arbitrary Python execution via three compounding weaknesses:\n\n1. Raw `getattr` is exposed in `safe_builtins`, bypassing `_getattr_` mediation.\n2. `validate_code` checks for literal dangerous dunder strings, but the payload constructs those names at runtime.\n3. The `execute_code` MCP tool can be exposed over HTTP/SSE transport with no authentication layer.\n\n## Proof of Concept\n\nThe local PoC was executed against the real pinned sandbox code path. It constructs dunder names at runtime, walks Python's class hierarchy through the exposed `getattr`, finds `subprocess.Popen`, and executes a harmless marker command.\n\nTranscript excerpt:\n\n```text\nPOC: IBM/mcp-context-forge RestrictedPython getattr sandbox bypass\nvalidation={'valid': True, 'message': 'Code passed validation', 'warnings': None}\nsuccess=True\nstdout=\"FOUND_POPEN\\nb'IBM_SANDBOX_POC_PASS'\\n\"\nIBM_RESTRICTEDPYTHON_GETATTR_POPEN_REPRO_PASS\n```\n\nPoC artifact hashes:\n\n```tex","public_affected_ranges":["<= 1.0.1"]}],"null_published_at":"2026-11-01T01:03:56.606Z","source_updated_at":"2026-10-15T01:07:05.000Z","source_disclosed_at":"2026-08-24T19:20:58.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-10-31T23:14:22.124Z"}],"next_cursor":null,"snapshot_revision":"42594"}