{"answers":{"affected":"2 open source packages ship an affected version, including @openc3/vue-common.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-77394 exists.","fix":"Upgrade @openc3/vue-common to 7.3.0 or later.","what":"CVE-2026-77394 is a high-severity cross-site scripting vulnerability in OpenC3 cosmos, published on 23 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-77394 and fix it if it is affected.\n\nWhat it is: CVE-2026-77394 is a high-severity cross-site scripting vulnerability in OpenC3 cosmos, published on 23 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-77394 exists.\n\nAffected packages and fixed versions:\n- @openc3/vue-common (npm): affected from 5.0.6; fixed in 7.3.0\n- @openc3/vue-common (npm): affected from 5.0.6; fixed in 7.3.0\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-77394/ (Markdown: https://insights.sbomify.com/CVE-2026-77394/index.md)","id":"CVE-2026-77394","markdown":"https://insights.sbomify.com/CVE-2026-77394/index.md","name":"CVE-2026-77394","record":{"aliases":["GHSA-gvf2-2rh5-mpgf"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["account_takeover","data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"OpenC3 COSMOS","requires_auth":"low_privilege","summary":"An authenticated user can inject malicious scripts into shared screens, stealing bearer tokens and taking over other operators' accounts.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":7.6,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"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.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"OpenC3 COSMOS: Stored, cross-user XSS via Telemetry screen BUTTON widget","id":"CVE-2026-77394","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"xss","year":"2026"},"n_packages":2,"n_references":4,"next":{"headline":"PJSIP: Heap buffer overflow in the AVI parser","id":"CVE-2026-77396"},"packages":[{"ecosystem":"npm","fixed":["7.3.0"],"introduced":["5.0.6"],"last_affected":[],"package":"@openc3/vue-common","purl":null,"source":"GHSA-gvf2-2rh5-mpgf"},{"ecosystem":"npm","fixed":["7.3.0"],"introduced":["5.0.6"],"last_affected":[],"package":"@openc3/vue-common","purl":"pkg:npm/%40openc3/vue-common","source":"GHSA-gvf2-2rh5-mpgf"}],"prev":{"headline":"Inductive Automation Ignition Incorrect Default Permissions","id":"CVE-2026-77393"},"products":["cosmos"],"published":"2026-09-23","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-23","vendors":["OpenC3"]},"summary":"An authenticated user can inject malicious scripts into shared screens, stealing bearer tokens and taking over other operators' accounts.","url":"https://insights.sbomify.com/CVE-2026-77394/"}