{"id":"CVE-2026-115190","kind":"vulnerability","aliases":["CVE-2026-115190"],"related":[],"title":"Mautic: stored segment and custom field values enable PHP object injection","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.","summary":"Mautic reads segment filter and custom field values from the database and unserializes them without restricting classes, so a crafted stored value can instantiate arbitrary PHP objects. With gadget chains from Mautic's dependencies, an attacker could potentially run code on the server and read, change or delete contact data.","severity":"high","cvss":8.0,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"mautic/core","fixed":["5.2.12","6.0.10","7.2.0"],"affected":">= 2.15.2, < 5.2.12; >= 6.0.0, < 6.0.10; >= 7.0.0, < 7.2.0","ecosystem":"packagist"}],"ecosystems":[],"tags":["cwe-502","deserialization","mautic","package","php","self-hosted"],"not_affected_if":["managed-hosting","no-untrusted-segment-editors","patched-5.2.12-6.0.10-7.2.0"],"how_to_check":"Run 'composer show mautic/core' (or check the version in Mautic's admin footer/about) and compare: vulnerable if >=2.15.2 and <5.2.12, >=6.0.0 and <6.0.10, or >=7.0.0 and <7.2.0. Also review who holds segment/custom-field edit and API permissions, and audit recent changes to segment filters and custom fields.","fix":"Upgrade to Mautic 5.2.12, 6.0.10 or 7.2.0 (per branch; Mautic 4 users: ELTS). No official workaround: restrict segment/custom-field management and API access to trusted users, and ensure no untrusted party can write to the Mautic database.","status":"open","published_at":"2026-10-26T14:16:30+00:00","first_seen_at":"2026-10-26T14:30:36+00:00","triaged_at":"2026-10-26T14:32:21+00:00","updated_at":"2026-10-26T14:32:58+00:00","category":"package","confidence":0.9,"triage":{"at":"2026-10-26T14:32:21Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Mautic: stored segment and custom field values enable PHP object injection","impact":"high","summary":"Mautic reads segment filter and custom field values from the database and unserializes them without restricting classes, so a crafted stored value can instantiate arbitrary PHP objects. With gadget chains from Mautic's dependencies, an attacker could potentially run code on the server and read, change or delete contact data.","category":"package","nicknames":[],"who_cares":["mautic","self-hosted","php"],"confidence":0.5,"needs_auth":"yes","worst_case":"Attacker runs code on the server and reads or deletes contact data","analyst_note":"Find affected and fixed Mautic versions and a patch or advisory link; the NVD entry in the sources does not list them.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["managed-hosting","no-untrusted-segment-editors"],"who_is_affected":"Teams running self-hosted Mautic where users with high privileges or write access to segment filters or custom field properties exist. Instances where only trusted administrators can edit segments and fields carry lower practical risk, but the sources do not name affected versions.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000574,"input_tokens":3496,"output_tokens":448,"severity_before":"high"},"analyst_status":"done","analyst_note":"Find affected and fixed Mautic versions and a patch or advisory link; the NVD entry in the sources does not list them.","search":"'-115190':14A,17A '-2026':13A,16A '-502':20B 'abil':216C 'abl':130C 'affect':206C,221C 'allow':182C 'api':169C 'arbitrari':52B,147C,187C 'attack':63B,127C,184C 'avail':175C,208C 'caus':146C 'chain':57B,174C 'chang':73B 'class':44B,114C 'code':67B,98C,188C 'combin':171C 'contact':76B,164C,203C 'could':64B,181C 'craft':47B,134C 'custom':5A,33B,94C,142C,167C 'cve':12A,15A 'cwe':19B 'data':77B,158C,196C,204C,223C 'databas':38B,107C 'delet':75B,195C 'depend':61B,179C 'deseri':21B,80C,108C,124C 'enabl':8A 'evalu':163C 'exampl':160C 'execut':186C 'exist':85C,215C 'exploit':209C 'export':165C 'field':6A,34B,95C,143C,168C 'filter':31B,92C,140C 'gadget':56B,173C 'handl':89C 'helper':125C 'high':211C 'host':27B 'includ':202C 'inject':11A,83C 'insecur':79C 'instanc':201C 'instanti':51B,117C,152C 'instead':118C 'later':155C 'mautic':1A,22B,28B,59B,87C,121C,154C,177C,200C 'mautic/core':18A 'may':115C 'modifi':193C 'object':10A,54B,82C,149C 'packag':23B 'path':99C 'php':9A,24B,53B,81C,113C,148C 'potenti':65B 'privileg':212C 'process':156C 'properti':96C,144C 'read':29B,72B,101C,192C 'request':170C 'requir':210C 'restrict':43B,111C 'run':66B 'safe':123C 'segment':3A,30B,91C,139C,162C 'self':26B 'self-host':25B 'serial':135C 'server':70B,191C 'sever':97C 'store':2A,48B,103C,132C,197C,222C 'unseri':40B 'use':120C 'valu':7A,35B,49B,104C,136C 'vulner':84C 'without':42B,110C 'write':218C","nicknames":[],"mitigations":[],"who_affected":"Teams running self-hosted Mautic where users with high privileges or write access to segment filters or custom field properties exist. Instances where only trusted administrators can edit segments and fields carry lower practical risk, but the sources do not name affected versions.","tier":"B","verified":{"fix":{"at":"2026-10-26T14:32:58Z","by":"analyst","run_id":833},"products":{"at":"2026-10-26T14:32:58Z","by":"analyst","run_id":833},"workarounds":{"at":"2026-10-26T14:32:58Z","by":"analyst","run_id":833},"how_to_check":{"at":"2026-10-26T14:32:58Z","by":"analyst","run_id":833},"who_affected":{"at":"2026-10-26T14:32:58Z","by":"analyst","run_id":833}},"analyst_revisit_at":null,"first_public_at":"2026-10-26T14:16:30+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H","cvss_by":"security@mautic.org","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-115190","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-115190","severity":null,"published_at":"2026-10-26T14:16:30+00:00","modified_at":"2026-10-26T14:21:33+00:00","first_seen_at":"2026-10-26T14:30:36+00:00","fetched_at":"2026-10-26T14:30:36+00:00","note":null},{"source":"analyst","external_id":"CVE-2026-115190:833","url":null,"severity":null,"published_at":"2026-10-26T14:32:58+00:00","modified_at":"2026-10-26T14:32:58+00:00","first_seen_at":"2026-10-26T14:32:58+00:00","fetched_at":"2026-10-26T14:32:58+00:00","note":"Read Mautic GHSA-5r63-8h35-j3mw (primary): affected >=2.15.2,<5.2.12; >=6.0.0,<6.0.10; >=7.0.0,<7.2.0; fixed 5.2.12/6.0.10/7.2.0; no official workaround. No exploitation or PoC noted; social search skipped (no CVE-id conversation expected)."}],"documents":[{"id":3878,"url":"https://github.com/mautic/mautic/security/advisories/GHSA-5r63-8h35-j3mw","title":"Insecure Deserialization in Segment Filters and Custom Fields (GHSA-5r63-8h35-j3mw)","kind":"advisory","source":"analyst","text":null,"published_at":null,"relation":"advisory","confidence":null,"note":null}],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}