{"id":"CVE-2026-115190","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-115190","generatedAt":"2026-10-27T22:47:37.072Z","title":"An insecure deserialization (PHP object injection) vulnerability exists in Mautic's handling of segment filters and custom field properties.","description":"An insecure deserialization (PHP object injection) vulnerability exists in Mautic's handling of segment filters and custom field properties. Several code paths that read these stored values from the database deserialize them without restricting which PHP classes may be instantiated, instead of using Mautic's safe deserialization helper. An attacker who is able to store a crafted serialized value in these segment filter or custom field properties can cause arbitrary PHP objects to be instantiated when Mautic later processes the data, for example during segment evaluation, contact export, or custom field API requests. Combined with gadget chains available in Mautic's dependencies, this could allow an attacker to execute arbitrary code on the server, read, modify, or delete data stored in the Mautic instance, including contact data, and affect its availability. Exploitation requires high privileges or an existing ability to write to the affected stored data.","published":"2026-10-26T14:16:30.000Z","lastModified":"2026-10-26T16:17:16.000Z","status":"Deferred","sourceIdentifier":"security@mautic.org","cvss":{"version":"3.1","score":8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H"},"cwe":["CWE-502"],"affected":[],"epss":null,"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 unscored. Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-26T14:16:30.000Z","detail":{"score":"8.0","severity":"HIGH","publishedAt":"2026-10-26T14:16:30.350Z"},"summary":"New CVE, high severity (CVSS 8.0)."}],"references":[{"url":"https://github.com/mautic/mautic/security/advisories/GHSA-5r63-8h35-j3mw","source":"security@mautic.org"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-115190","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."}