Analysis and contextual insights are available on OpenCVE Cloud.
No vendor fix or workaround currently provided.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
Sign in to view the affected projects.
| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-gvf2-2rh5-mpgf | OpenC3 COSMOS: Stored, cross-user XSS via Telemetry screen BUTTON widget |
Wed, 23 Sep 2026 21:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Openc3
Openc3 cosmos |
|
| Vendors & Products |
Openc3
Openc3 cosmos |
Wed, 23 Sep 2026 20:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Wed, 23 Sep 2026 19:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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 system_set permission can store a shared screen through POST /openc3-api/screen whose BUTTON widget action is evaluated by openc3-cosmos-init/plugins/packages/openc3-vue-common/src/widgets/ButtonWidget.vue in another operator's browser session when the button is activated. The stored script runs in the COSMOS origin and can read localStorage.openc3Token, allowing theft of the victim's bearer token, account takeover, and actions with the victim's privileges. The permissive content security policy contributes to execution but is not the primary root cause. This issue is fixed in version 7.3.0. | |
| Title | OpenC3 COSMOS: Stored, cross-user XSS via Telemetry screen BUTTON widget | |
| Weaknesses | CWE-79 | |
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-09-23T19:28:31.603Z
Reserved: 2026-08-20T19:55:27.022Z
Link: CVE-2026-77394
Updated: 2026-09-23T19:28:25.805Z
Status : Deferred
Published: 2026-09-23T19:19:15.343
Modified: 2026-09-23T20:17:15.660
Link: CVE-2026-77394
No data.
OpenCVE Enrichment
Updated: 2026-09-23T21:00:13Z
Github GHSA