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, 11.0.0-11.5.51, 12.0.0-12.4.46, 13.0.0-13.4.31 and 14.0.0-14.3.3.

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact High

Subsequent System Integrity Impact High

Subsequent System Availability Impact High

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00246.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
TYPO3 TYPO3 CMS unaffected
Version Status Constraints
0 affected < 10.4.57
11.0.0 affected < 11.5.51
12.0.0 affected < 12.4.46
13.0.0 affected < 13.4.31
14.0.0 affected < 14.3.3

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No data.

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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/TYPO3/typo3/commit/48bcf24f31f52cc0b43d3bea4984634bd2cf85c7 cve-icon cve-icon
https://github.com/TYPO3/typo3/commit/87cd7c5b710c44d3606fed277b040a75dc6a9c02 cve-icon cve-icon
https://typo3.org/security/advisory/typo3-core-sa-2026-018 cve-icon cve-icon
History

Tue, 09 Jun 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 09 Jun 2026 11:15:00 +0000

Type Values Removed Values Added
Description 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, 11.0.0-11.5.51, 12.0.0-12.4.46, 13.0.0-13.4.31 and 14.0.0-14.3.3.
Title TYPO3 CMS - Insecure Deserialization in Core API
First Time appeared Typo3
Typo3 typo3
Weaknesses CWE-502
CPEs cpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*
Vendors & Products Typo3
Typo3 typo3
References
Metrics cvssV4_0

{'score': 6.3, 'vector': '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: TYPO3

Published:

Updated: 2026-06-09T13:40:40.839Z

Reserved: 2026-06-01T10:52:50.597Z

Link: CVE-2026-49740

cve-icon Vulnrichment

Updated: 2026-06-09T13:40:37.814Z

cve-icon NVD

Status : Deferred

Published: 2026-06-09T11:16:53.380

Modified: 2026-06-09T13:46:50.540

Link: CVE-2026-49740

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-09T12:30:04Z

Weaknesses