CVE-2026-107848Contao: Cross-site request forgery in custom backend actions
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 3.5 LOW (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
- Weakness (CWE)
- CWE-352
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Oct 13, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
contao contao contao:contao (from the name) | from 4.0.0, < 5.3.50; from 5.4.0-RC1, < 5.7.12 | CNA record |
References
- https://github.com/contao/contao/security/advisories/GHSA-9ff2-p842-45wqx-refsource-confirm
- https://github.com/contao/contao/commit/34dd27ee6739f10568d3d95d8784862255c925b4x-refsource-misc
- https://github.com/contao/contao/releases/tag/5.7.12x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.