{"items":[{"id":"NVI-00018490","kind":"vulnerability","title":"OpenC3 COSMOS allows arbitrary writes to plugins directory via path-traversed config filenames","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-4jvx-93h3-f45h","CVE-2026-42085"],"plain_summary":"GitHub lists this reviewed advisory for openc3, openc3. 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-2f8e593e2fe7187f49b7b02533e98c08"],"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":"2026-05-29T21:45:17.000Z","value":"4.3 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-2f8e593e2fe7187f49b7b02533e98c08"}],"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-2f8e593e2fe7187f49b7b02533e98c08","url":"https://github.com/advisories/GHSA-4jvx-93h3-f45h","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-4jvx-93h3-f45h","publisher":"GitHub Advisory Database","observed_at":"2026-11-07T00:53:14.635Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-2f8e593e2fe7187f49b7b02533e98c08"],"technology":"openc3","known_exclusions":[],"conditions_summary":"### Summary\nOpenC3 COSMOS contains a design flaw in the `save_tool_config()` function that allows saving tool configuration files at arbitrary locations inside the shared `/plugins` directory tree by supplying crafted configuration filenames. Although the implementation sufficiently mitigates standard path traversal attacks, by canonicalizing filename to an absolute path, all plugins share this same root directory. That enables users to create arbitrary file structures and overwrite existing configuration files within the shared `/plugins` directory.\n\n### Details\nIn function `save_tool_config()` (local_mode.rb)  responsible for saving user-supplied tool configuration, the desired saving directory is not sufficiently enforced, instead allowing writes inside entire `OPENC3_LOCAL_MODE_PATH`.\n\n### PoC\n1.\tNavigate to any tool that enables “Save Configuration” option in left-hand drop-down menu (here Limits Monitor as an example)\n2.\tSave a new config with path traversal name using “../” sequences to escape desired directory (up to 3 levels high)\n3.\tObserve new ","public_affected_ranges":["< 6.10.5"]},{"certainty":"source_listed","source_ids":["sr-2f8e593e2fe7187f49b7b02533e98c08"],"technology":"openc3","known_exclusions":[],"conditions_summary":"### Summary\nOpenC3 COSMOS contains a design flaw in the `save_tool_config()` function that allows saving tool configuration files at arbitrary locations inside the shared `/plugins` directory tree by supplying crafted configuration filenames. Although the implementation sufficiently mitigates standard path traversal attacks, by canonicalizing filename to an absolute path, all plugins share this same root directory. That enables users to create arbitrary file structures and overwrite existing configuration files within the shared `/plugins` directory.\n\n### Details\nIn function `save_tool_config()` (local_mode.rb)  responsible for saving user-supplied tool configuration, the desired saving directory is not sufficiently enforced, instead allowing writes inside entire `OPENC3_LOCAL_MODE_PATH`.\n\n### PoC\n1.\tNavigate to any tool that enables “Save Configuration” option in left-hand drop-down menu (here Limits Monitor as an example)\n2.\tSave a new config with path traversal name using “../” sequences to escape desired directory (up to 3 levels high)\n3.\tObserve new ","public_affected_ranges":[">= 7.0.0.pre.rc1, < 7.0.0-rc3"]}],"null_published_at":"2026-11-07T07:07:39.842Z","source_updated_at":"2026-05-29T21:45:17.000Z","source_disclosed_at":"2026-04-22T22:22:02.000Z","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":"2026-11-07T00:53:14.635Z"}],"next_cursor":null,"snapshot_revision":"42594"}