{"id":"CVE-2026-104907","published":"2026-10-02T16:16:48.253","lastModified":"2026-10-02T17:17:04.823","description":"MISP contains a cross-site scripting (XSS) vulnerability in the remote event preview page. When a linked (remote) MISP server is configured, the event preview renders tag identifiers inside an inline JavaScript onclick attribute. The tag ID value was HTML-escaped but not sanitized for the JavaScript string context, meaning a malicious linked server could supply a tag ID containing characters (such as a single quote) that break out of the JavaScript string literal and inject arbitrary script.\n\nPreconditions:\n\n- A linked/remote MISP server is configured and connected to the local instance.\n\n- The linked server supplies a crafted tag ID in an event.\n\n- An authenticated user views the event preview and interacts with the affected tag element.\n\nImpact:\n\n- Arbitrary JavaScript execution in the context of the viewing user's browser session, potentially allowing session hijacking, data exfiltration, or unauthorized actions on behalf of the user.\n\nAffected versions: MISP prior to the fix commit (v2.5.48 or later, exact boundary unconfirmed).","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":["CWE-79","CWE-116"],"vendors":[],"products":[],"references":[{"url":"https://github.com/MISP/MISP/commit/70ad174dd","tags":[]}],"exploitRefs":[{"url":"https://github.com/MISP/MISP/commit/70ad174dd","tags":[]}],"hasPoc":true,"ai":null}