{"id":"CVE-2026-104907","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-104907","generatedAt":"2026-10-28T02:21:31.044Z","title":"MISP contains a cross-site scripting (XSS) vulnerability in the remote event preview page.","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).","published":"2026-10-02T16:16:48.000Z","lastModified":"2026-10-02T17:17:05.000Z","status":"Deferred","sourceIdentifier":"5a6e4751-2f3f-4070-9419-94fb35b644e8","cvss":{"version":"4.0","score":4.8,"severity":"MEDIUM","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-79","CWE-116"],"affected":[],"epss":{"score":0.00352,"percentile":0.28638,"date":"2026-10-26","history":[{"date":"2026-10-03","score":0.00352,"percentile":0.26602}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.35%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-02T16:16:48.000Z","detail":{"score":"4.8","severity":"MEDIUM","publishedAt":"2026-10-02T16:16:48.253Z"},"summary":"New CVE, medium severity (CVSS 4.8)."}],"references":[{"url":"https://github.com/MISP/MISP/commit/70ad174dd","source":"5a6e4751-2f3f-4070-9419-94fb35b644e8"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-104907","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}