{"id":"CVE-2026-104907","title":"MISP contains a cross-site scripting (XSS) vulnerability in the remote event preview page","summary":"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…","severity":"medium","cvss":4.8,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N","cwe":["CWE-79","CWE-116"],"vendor":"MISP","product":"MISP","affected":["MISP < 2.5.48"],"published":"2026-10-02","updated":"2026-10-02","sourceUpdated":"2026-10-02T17:17:04.823","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-104907","references":[{"url":"https://github.com/MISP/MISP/commit/70ad174dd","label":"5a6e4751-2f3f-4070-9419-94fb35b644e8"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-02T16:17:59.477633Z"},"cvssSource":"cna","ingestedAt":"2026-10-02T16:22:59.529Z","slug":"CVE-2026-104907","body":"## Overview\n\nMISP 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).\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":26,"depthScoreParts":{"impact":26.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}