{"id":"CVE-2026-77602","published":"2026-09-23T19:19:18.550","lastModified":"2026-09-29T03:17:17.883","description":"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 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.","cvssScore":9.9,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","cwes":["CWE-94"],"vendors":[],"products":[],"references":[{"url":"https://github.com/OpenC3/cosmos/commit/71943352a28128ef3e7e894319d97a656b5cd4f2","tags":[]},{"url":"https://github.com/OpenC3/cosmos/commit/7a1538a4626f82c0d1540fcaa27ffdcbbd71ff81","tags":[]},{"url":"https://github.com/OpenC3/cosmos/pull/3488","tags":[]},{"url":"https://github.com/OpenC3/cosmos/security/advisories/GHSA-jjq7-m736-w977","tags":[]},{"url":"https://github.com/OpenC3/cosmos/security/advisories/GHSA-jjq7-m736-w977","tags":[]}],"exploitRefs":[{"url":"https://github.com/OpenC3/cosmos/commit/71943352a28128ef3e7e894319d97a656b5cd4f2","tags":[]},{"url":"https://github.com/OpenC3/cosmos/commit/7a1538a4626f82c0d1540fcaa27ffdcbbd71ff81","tags":[]},{"url":"https://github.com/OpenC3/cosmos/pull/3488","tags":[]},{"url":"https://github.com/OpenC3/cosmos/security/advisories/GHSA-jjq7-m736-w977","tags":[]},{"url":"https://github.com/OpenC3/cosmos/security/advisories/GHSA-jjq7-m736-w977","tags":[]}],"hasPoc":true,"ai":{"summary":"Authenticated non-administrator users can write content that is later executed with elevated privileges, leading to remote code execution.","exploitability":"Exploitation requires authentication and access to the targets_modified/ directory, making it moderately hard to exploit.","blast_radius":"If exploited, the impact could be severe, as it allows execution of arbitrary code with internal credentials and data access.","remediation":"Upgrade to OpenC3 COSMOS version 7.3.0 or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["rce","auth-bypass","web"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-09-27T08:48:01.512Z"}}