CVE-2026-77394
Gravedad CVSS v3.1:
ALTA
Tipo:
CWE-79
Neutralización incorrecta de la entrada durante la generación de la página web (Cross-site Scripting)
Fecha de publicación:
23/09/2026
Última modificación:
23/09/2026
Descripción
*** Pendiente de traducción *** 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.
Impacto
Puntuación base 3.x
7.60
Gravedad 3.x
ALTA
Referencias a soluciones, herramientas e información
- https://github.com/OpenC3/cosmos/commit/10371f8f410b9ad588f98dfa3befaaacb6587cd3
- https://github.com/OpenC3/cosmos/pull/3560
- https://github.com/OpenC3/cosmos/releases/tag/v7.3.0
- https://github.com/OpenC3/cosmos/security/advisories/GHSA-gvf2-2rh5-mpgf
- https://github.com/OpenC3/cosmos/security/advisories/GHSA-gvf2-2rh5-mpgf