GHSA-GVF2-2RH5-MPGF OpenC3 COSMOS: Stored, cross-user XSS via Telemetry screen BUTTON widget

Summary A user who can save a telemetry screen permission systemset can embed JavaScript in a screen BUTTON widget. The BUTTON widget evals the stored button text in the browser when the button is activated, and screens are shared content rendered to other users in the scope. As a result, an...

OpenC3 COSMOS: Stored, cross-user XSS via Telemetry screen BUTTON widget

Summary A user who can save a telemetry screen permission systemset can embed JavaScript in a screen BUTTON widget. The BUTTON widget evals the stored button text in the browser when the button is activated, and screens are shared content rendered to other users in the scope. As a result, an...

CVE-2026-77602

creationtimestamp| type| source ---|---|--- 2026-09-23 20:08:06+00:00| seen| https://bsky.app/profile/stemshop.bsky.social/post/3mw7k7d42lb2r 2026-09-23 20:35:09+00:00| published-proof-of-concept| https://github.com/OpenC3/cosmos/security/advisories/GHSA-jjq7-m736-w977 2026-09-24 00:50:05+00:00|...

CVE-2026-77394

OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. From 5.0.6 until 7.3.0, an authenticated actor with systemset permission can store a shared screen through POST /openc3-api/screen whose BUTTON widget action is evaluated by...

OpenC3 COSMOS: Authenticated remote code execution via the user-writable config overlay (table definitions, cmd/tlm definitions, and script suites)

Summary COSMOS reads configuration from a user-writable overlay targetsmodified/ before the read-only plugin-installed targets/ tree, and the config subsystem executes code on those files: ConfigParser renders every file as ERB by default, a GENERICREADCONVERSION / GENERICWRITECONVERSION block is...

CVE-2026-77602 OpenC3 COSMOS: Authenticated remote code execution via the user-writable config overlay (table definitions, cmd/tlm definitions, and script suites)

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 targetsmodified/ that is later executed by multiple configuration paths below the intended...

CVE-2026-77602

OpenC3 COSMOS versions 5.1.0 through 7.3.0 are vulnerable to authenticated remote code execution (RCE) . The root cause is that the system processes a user-writable configuration overlay (targets_modified/) before the read-only targets/ tree. Authenticated non-administrator users can use features...

CVE-2026-77394 OpenC3 COSMOS: Stored, cross-user XSS via Telemetry screen BUTTON widget

OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. From 5.0.6 until 7.3.0, an authenticated actor with systemset permission can store a shared screen through POST /openc3-api/screen whose BUTTON widget action is evaluated by...

CVE-2026-77394

OpenC3 COSMOS versions 5.0.6 through 7.3.0 are vulnerable to a stored, cross-user XSS via the Telemetry screen BUTTON widget. An authenticated actor with system_set permissions can store a screen via POST /openc3-api/screen containing a button action. The application fails to sanitize this input,...

EUVD-2026-85564

OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. From 5.0.6 until 7.3.0, an authenticated actor with systemset permission can store a shared screen through POST /openc3-api/screen whose BUTTON widget action is evaluated by...

CVE-2026-77394 OpenC3 COSMOS: Stored, cross-user XSS via Telemetry screen BUTTON widget

OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. From 5.0.6 until 7.3.0, an authenticated actor with systemset permission can store a shared screen through POST /openc3-api/screen whose BUTTON widget action is evaluated by...

CVE-2026-77394 OpenC3 COSMOS: Stored, cross-user XSS via Telemetry screen BUTTON widget

OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. From 5.0.6 until 7.3.0, an authenticated actor with systemset permission can store a shared screen through POST /openc3-api/screen whose BUTTON widget action is evaluated by...

OpenC3 COSMOS: Authenticated OS command injection via the `pypi_url` setting

Summary An authenticated user can execute arbitrary operating system commands on the openc3-cosmos-cmd-tlm-api service. The pypiurl setting is interpolated, unescaped, into a command line that is run through a shell backtick when a plugin is installed. Shell metacharacters in the setting value ar...

CVE-2026-77601

OpenC3 COSMOS versions 5.12.0 through 7.3.0 are vulnerable to authenticated OS command injection via the pypi_url setting. An attacker can use the set_setting API method (POST /openc3-api/api) to write a malicious URL containing shell metacharacters. When a plugin with Python dependencies is inst...

CVE-2026-77601 OpenC3 COSMOS: Authenticated OS command injection via the `pypi_url` setting

OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. From 5.12.0 until 7.3.0, an authenticated actor can write the pypiurl setting through setsetting at POST /openc3-api/api, then cause OpenC3::PluginModel.installphase2 in...

CVE-2026-42085

OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. Prior to versions 6.10.5 and 7.0.0-rc3, OpenC3 COSMOS contains a design flaw in the savetoolconfig function that allows saving tool configuration files at arbitrary locations...

CVE-2026-42086

OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. Prior to version 7.0.0, the Command Sender UI uses an unsafe eval function on array-like command parameters, which allows a user-supplied payload to execute in the browser when...

CVE-2026-42087

OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. From version 6.7.0 to before version 7.0.0-rc3, a SQL injection vulnerability exists in the Time-Series Database TSDB component of COSMOS. The tsdblookup function in the...

CVE-2026-42088

OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. Prior to version 7.0.0-rc3, the Script Runner widget allows users to execute Python and Ruby scripts directly from the openc3-COSMOS-script-runner-api container. Because all the...

PYSEC-2026-2245

OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. Prior to version 7.0.0-rc3, the Script Runner widget allows users to execute Python and Ruby scripts directly from the openc3-COSMOS-script-runner-api container. Because all the...