{"id":"CVE-2026-107848","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-107848","generatedAt":"2026-10-28T02:24:15.316Z","title":"Backend actions dispatched through the key parameter can therefore execute without a CSRF token when an authenticated backend user loads an attacker-controlled URL.","description":"Contao is an Open Source CMS. From version 4.0.0 until 5.3.50 and 5.7.12, RequestTokenListener validates REQUEST_TOKEN only for POST requests, while the declarative GET guard runs only when an act parameter is present. Backend actions dispatched through the key parameter can therefore execute without a CSRF token when an authenticated backend user loads an attacker-controlled URL. Reachable actions remain limited to modules available to that user, and the advisory demonstrates destructive or state-changing actions rather than privilege escalation. This issue is fixed in versions 5.3.50 and 5.7.12.","published":"2026-10-09T21:17:03.000Z","lastModified":"2026-10-16T17:17:04.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":3.5,"severity":"LOW","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N"},"cwe":["CWE-352"],"affected":[],"epss":{"score":0.00115,"percentile":0.01563,"date":"2026-10-26","history":[{"date":"2026-10-10","score":0.00113,"percentile":0.01345}]},"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 (0.11%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-09T21:17:03.000Z","detail":{"score":"3.5","severity":"LOW","publishedAt":"2026-10-09T21:17:02.617Z"},"summary":"New CVE, low severity (CVSS 3.5)."}],"references":[{"url":"https://github.com/contao/contao/commit/34dd27ee6739f10568d3d95d8784862255c925b4","source":"security-advisories@github.com"},{"url":"https://github.com/contao/contao/releases/tag/5.7.12","source":"security-advisories@github.com"},{"url":"https://github.com/contao/contao/security/advisories/GHSA-9ff2-p842-45wq","source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-107848","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."}