{"cve":"CVE-2026-104907","nvd":{"published":"2026-10-02T16:16:48.253","modified":"2026-10-02T17:17:04.823","status":"Deferred","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).","cvss_v4":{"vector":"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","score":4.8},"cvss_v3":null,"cwes":["CWE-79","CWE-116"],"references":["https://github.com/MISP/MISP/commit/70ad174dd"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:57:46.668721662+00:00"},"epss":{"cve":"CVE-2026-104907","score":0.00352,"percentile":0.28606,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}