{"schema":"threatline.record/2","record":{"id":"CVE-2026-104907","aliases":[],"summary":"MISP: JavaScript Injection via Remote Tag ID in Event Preview Inline Handler","details":"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).","categories":["Unclassified"],"product":"MISP","vendor":"MISP","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-104907","source_modified_at":"2026-10-02T16:18:12.403Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"MISP","vendor":"MISP","versions":[{"lessThan":"2.5.48","status":"affected","version":"0","versionType":"semver"}],"defaultStatus":null}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-104907","source_modified_at":"2026-10-02T16:18:12.403Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"MISP","ecosystem":null},"version":"2.5.48","basis":"first unaffected version stated in the CVE record"}],"cvss":4.8,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00352,"percentile":0.27698,"score_date":"2026-10-23"},"published_at":"2026-10-02T15:51:34.565Z","modified_at":"2026-10-02T16:18:12.403Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-104907","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-10-02T16:18:12.403Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-104907","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/MISP/MISP/commit/70ad174dd","tags":["patch"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-02T16:17:59.477633Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-02T16:18:12.403Z","content_hash":"03bb3a244513bcfe85a5edd5adec72603b2f79aa54bf2f4be3ca38def192233d"}}