TYPO3 CMS - Insecure Deserialization in Core API
TYPO3's cache frontend (VariableFrontend) and persistent key-value store (Registry) deserialized PHP payloads without integrity validation or class restrictions. An attacker with write access to the underlying storage backend (cache store or sys_registry database table) could inject a crafted serialized payload to trigger PHP Object Injection, potentially exploiting a gadget chain to achieve Remote Code Execution or other high-impact effects. Exploiting this vulnerability requires direct local write access to the storage, such as the SQL database or file system. This issue affects TYPO3 CMS versions before 10.4.57, 11.0.0-11.5.50, 12.0.0-12.4.45, 13.0.0-13.4.30 and 14.0.0-14.3.2.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-49740
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 6 Nov 2026, 02:18 UTC · Revision 1
Source evidence
TYPO3 CMS - Insecure Deserialization in Core API
core-osv · Original sourcePublished 9 Jun 2026, 10:53 UTC
TYPO3's cache frontend (VariableFrontend) and persistent key-value store (Registry) deserialized PHP payloads without integrity validation or class restrictions. An attacker with write access to the underlying storage backend (cache store or sys_registry database table) could inject a crafted serialized payload to trigger PHP Object Injection, potentially exploiting a gadget chain to achieve Remote Code Execution or other high-impact effects. Exploiting this vulnerability requires direct local write access to the storage, such as the SQL database or file system. This issue affects TYPO3 CMS versions before 10.4.57, 11.0.0-11.5.50, 12.0.0-12.4.45, 13.0.0-13.4.30 and 14.0.0-14.3.2.
osv:CVE-2026-49740
Complete source record
{
"id": "d80431acb2642bc659a4ec7448e2691f5bea55df361be418d10696d3551ba0c8",
"url": "https://osv.dev/vulnerability/CVE-2026-49740",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "TYPO3 CMS - Insecure Deserialization in Core API",
"summary": "TYPO3's cache frontend (VariableFrontend) and persistent key-value store (Registry) deserialized PHP payloads without integrity validation or class restrictions. An attacker with write access to the underlying storage backend (cache store or sys_registry database table) could inject a crafted serialized payload to trigger PHP Object Injection, potentially exploiting a gadget chain to achieve Remote Code Execution or other high-impact effects. Exploiting this vulnerability requires direct local write access to the storage, such as the SQL database or file system. This issue affects TYPO3 CMS versions before 10.4.57, 11.0.0-11.5.50, 12.0.0-12.4.45, 13.0.0-13.4.30 and 14.0.0-14.3.2.",
"evidence": "osv:CVE-2026-49740",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-49740",
"aliases": [
"CVE-2026-49740",
"GHSA-c78m-c52x-jgwp"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/typo3/typo3",
"type": "GIT",
"events": [
{
"introduced": "fd8745e46bb11773e85524b8ee9650dabe340713"
},
{
"fixed": "59bfeaaf0136dfe17011786ce825884e48bedc8d"
},
{
"introduced": "6d6bd23afff6a48ee3efeaa68eb829820397d6a1"
},
{
"fixed": "e16ec78165a7d60f09dcac04bfbb309409e174b3"
},
{
"fixed": "48bcf24f31f52cc0b43d3bea4984634bd2cf85c7"
},
{
"fixed": "87cd7c5b710c44d3606fed277b040a75dc6a9c02"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "13.0.0"
},
{
"fixed": "13.4.31"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"range": [
{
"introduced": "14.0.0"
},
{
"fixed": "14.3.3"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"range": [
{
"fixed": "48bcf24f31f52cc0b43d3bea4984634bd2cf85c7"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "87cd7c5b710c44d3606fed277b040a75dc6a9c02"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
"versions": [
"v14.3.2",
"v13.4.30",
"v14.3.1",
"v13.4.29",
"v14.3.0",
"v13.4.28",
"v14.2.0",
"v13.4.27",
"v13.4.26",
"v14.1.0",
"v13.4.25",
"v13.4.24",
"v13.4.23",
"v13.4.22",
"v13.4.21",
"v14.0.0",
"v13.4.20",
"v13.4.19",
"v13.4.18",
"v13.4.17",
"v13.4.16",
"v13.4.15",
"v13.4.14",
"v13.4.13",
"v13.4.12",
"v13.4.11",
"v13.4.10",
"v13.4.9",
"v13.4.8",
"v13.4.7",
"v13.4.6",
"v13.4.5",
"v13.4.4",
"v13.4.3",
"v13.4.2",
"v13.4.1",
"v13.4.0",
"v13.3.0",
"v13.2.1",
"v13.2.0",
"v13.1.0",
"v13.0.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49740.json"
}
}
],
"modified": "2026-10-28T02:30:45.992835777Z",
"provider": "osv",
"references": [
"https://packagist.org",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49740.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-49740",
"https://typo3.org/security/advisory/typo3-core-sa-2026-018",
"https://github.com/TYPO3/typo3/commit/48bcf24f31f52cc0b43d3bea4984634bd2cf85c7",
"https://github.com/TYPO3/typo3/commit/87cd7c5b710c44d3606fed277b040a75dc6a9c02",
"https://github.com/TYPO3/typo3"
],
"provider_metadata": {
"cwe_ids": [
"CWE-502"
],
"cna_assigner": "TYPO3",
"unresolved_ranges": [
{
"extracted_events": [
{
"range": [
{
"fixed": "10.4.57"
},
{
"introduced": "11.0.0"
},
{
"fixed": "11.5.51"
},
{
"introduced": "12.0.0"
},
{
"fixed": "12.4.46"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49740.json"
}
},
"related_cves": [
{
"value": "CVE-2026-49740",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 514217,
"published_at": "2026-06-09T10:53:55.777+00:00"
}