{"id":"CVE-2026-77602","title":"OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems","summary":"OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. From 5.1.0 until 7.3.0, authenticated non-administrator users can write content under targets_modified/ that is later…","severity":"critical","cvss":9.9,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","cwe":["CWE-94"],"vendor":"openc3","product":"openc3","affected":["openc3 >= 5.1.0, <= 7.2.1"],"patched":["openc3 7.3.0"],"published":"2026-09-23","updated":"2026-09-23","sourceUpdated":"2026-09-23T19:19:18.683","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-77602","references":[{"url":"https://github.com/OpenC3/cosmos/commit/71943352a28128ef3e7e894319d97a656b5cd4f2","label":"security-advisories@github.com"},{"url":"https://github.com/OpenC3/cosmos/commit/7a1538a4626f82c0d1540fcaa27ffdcbbd71ff81","label":"security-advisories@github.com"},{"url":"https://github.com/OpenC3/cosmos/pull/3488","label":"security-advisories@github.com"},{"url":"https://github.com/OpenC3/cosmos/security/advisories/GHSA-jjq7-m736-w977","label":"security-advisories@github.com"},{"url":"https://github.com/advisories/GHSA-jjq7-m736-w977"}],"tags":["nvd","ghsa","rubygems","cve.org"],"aliases":["GHSA-jjq7-m736-w977"],"ecosystem":"rubygems","ingestedAt":"2026-09-23T19:31:04.468Z","slug":"CVE-2026-77602","body":"## Overview\n\nOpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. From 5.1.0 until 7.3.0, authenticated non-administrator users can write content under targets_modified/ that is later executed by multiple configuration paths below the intended code-execution privilege tier. Table and command or telemetry definitions are processed through ConfigParser, PacketConfig, GENERIC_READ_CONVERSION, or GENERIC_WRITE_CONVERSION, allowing ERB rendering or Ruby and Python evaluation, while openc3-cosmos-script-runner-api/scripts/run_suite_analysis.rb executes suite procedure files through require. Storage uploads, screen saves, and script creation can place content in the overlay, and triggering table processing, a cmd/tlm reload, or suite analysis executes the content in cmd-tlm-api, decom microservices, or Script Runner with access to internal credentials and data. This issue is fixed in version 7.3.0.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-77602)\n\nAffected packages:\n\n- `openc3 >= 5.1.0, <= 7.2.1`\n\nPatched in:\n\n- `openc3 7.3.0`\n\nSource: https://github.com/advisories/GHSA-jjq7-m736-w977","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":54.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}