{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-107848", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-10-08T22:34:49.291Z", "datePublished": "2026-10-09T20:22:12.778Z", "dateUpdated": "2026-10-09T20:22:12.778Z"}, "containers": {"cna": {"title": "Contao: Cross-site request forgery in custom backend actions", "problemTypes": [{"descriptions": [{"cweId": "CWE-352", "lang": "en", "description": "CWE-352: Cross-Site Request Forgery (CSRF)", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 3.5, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/contao/contao/security/advisories/GHSA-9ff2-p842-45wq", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/contao/contao/security/advisories/GHSA-9ff2-p842-45wq"}, {"name": "https://github.com/contao/contao/commit/34dd27ee6739f10568d3d95d8784862255c925b4", "tags": ["x_refsource_MISC"], "url": "https://github.com/contao/contao/commit/34dd27ee6739f10568d3d95d8784862255c925b4"}, {"name": "https://github.com/contao/contao/releases/tag/5.7.12", "tags": ["x_refsource_MISC"], "url": "https://github.com/contao/contao/releases/tag/5.7.12"}], "affected": [{"vendor": "contao", "product": "contao", "versions": [{"version": ">= 4.0.0, < 5.3.50", "status": "affected"}, {"version": ">= 5.4.0-RC1, < 5.7.12", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-09T20:22:12.778Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-9ff2-p842-45wq", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "contao", "vendor": "contao", "versions": [{"status": "affected", "version": ">= 4.0.0, < 5.3.50"}, {"status": "affected", "version": ">= 5.4.0-RC1, < 5.7.12"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-107848", "lastModified": "2026-10-09T21:17:02.617", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 3.5, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.1, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-10-09T21:17:02.617", "references": [{"source": "security-advisories@github.com", "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"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-352"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.0.0,5.3.50)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.4.0-RC1,5.7.12)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "contao", "source": "cna", "vendor": "contao"}, "product": "contao", "vendor": "contao"}], "created": "2026-10-09T21:30:12.408041+00:00", "updated": "2026-10-09T21:30:12.848683+00:00", "vendors": ["contao", "contao$PRODUCT$contao"]}