{"id":"CVE-2026-85236","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-85236","generatedAt":"2026-10-28T07:04:29.965Z","title":"A cross-site request forgery (CSRF) vulnerability existed in the cullEmptyEvents action of MISP.","description":"A cross-site request forgery (CSRF) vulnerability existed in the cullEmptyEvents action of MISP. The endpoint performed a state-changing and irreversible operation while accepting HTTP GET requests.\n\n\nBecause bodyless GET requests are not subject to CakePHP's CSRF validation, an attacker could cause an authenticated MISP user with sufficient privileges to invoke the endpoint simply by causing their browser to load a crafted URL, for example through an embedded image or other automatically requested resource.\n\n\nSuccessful exploitation triggers the deletion of published empty events. The deletion is particularly significant because the operation uses skipBlocklist, meaning the removed events do not leave blocklist entries that could prevent or track their subsequent synchronization. This can result in unintended and potentially irreversible deletion of MISP event records without explicit user interaction.\n\n\nThe vulnerability was addressed by restricting cullEmptyEvents to HTTP POST requests, ensuring that CakePHP's normal CSRF protections are applied to the operation.","published":"2026-09-03T16:18:27.000Z","lastModified":"2026-09-11T14:14:31.000Z","status":"Analyzed","sourceIdentifier":"5a6e4751-2f3f-4070-9419-94fb35b644e8","cvss":{"version":"4.0","score":8.8,"severity":"HIGH","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/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-352"],"affected":["misp-project/misp"],"epss":{"score":0.00252,"percentile":0.1657,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.25%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://github.com/MISP/MISP/commit/2b6b3ac90","tags":["Patch"],"source":"5a6e4751-2f3f-4070-9419-94fb35b644e8"},{"url":"https://github.com/MISP/MISP/commit/50106c9a0","tags":["Patch"],"source":"5a6e4751-2f3f-4070-9419-94fb35b644e8"},{"url":"https://github.com/MISP/MISP/commit/66ecb5acb","tags":["Patch"],"source":"5a6e4751-2f3f-4070-9419-94fb35b644e8"},{"url":"https://github.com/MISP/MISP/commit/9c1346ce1","tags":["Patch"],"source":"5a6e4751-2f3f-4070-9419-94fb35b644e8"},{"url":"https://github.com/MISP/MISP/commit/cfc8b8a6d","tags":["Patch"],"source":"5a6e4751-2f3f-4070-9419-94fb35b644e8"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-85236","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."}