CVE-2026-49740
TYPO3 CMS - Insecure Deserialization in Core API
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, 11.0.0-11.5.50, 12.0.0-12.4.45, 13.0.0-13.4.30 and 14.0.0-14.3.2.
INFO
Published Date :
June 9, 2026, 11:16 a.m.
Last Modified :
July 23, 2026, 8:10 a.m.
Remotely Exploit :
No
Source :
f4fb688c-4412-4426-b4b8-421ecf27b14a
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 4.0 | MEDIUM | f4fb688c-4412-4426-b4b8-421ecf27b14a | ||||
| CVSS 4.0 | MEDIUM | f4fb688c-4412-4426-b4b8-421ecf27b14a |
Solution
- Update TYPO3 to a patched version.
- Ensure integrity validation for serialized data.
- Restrict deserialized classes.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-49740.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-49740 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-49740
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-49740 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-49740 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 23, 2026
Action Type Old Value New Value Added Translation Title: TYPO3 CMS de TYPO3, Description: El frontend de caché de TYPO3 (VariableFrontend) y el almacén persistente de clave-valor (Registry) deserializaban cargas útiles PHP sin validación de integridad ni restricciones de clase. Un atacante con acceso de escritura al backend de almacenamiento subyacente (almacén de caché o tabla de base de datos sys_registry) podría inyectar una carga útil serializada manipulada para desencadenar una inyección de objetos PHP, explotando potencialmente una cadena de gadgets para lograr la ejecución remota de código u otros efectos de alto impacto. Explotar esta vulnerabilidad requiere acceso de escritura local directo al almacenamiento, como la base de datos SQL o el sistema de archivos. Este problema afecta a las versiones de TYPO3 CMS anteriores a 10.4.57, 11.0.0-11.5.51, 12.0.0-12.4.46, 13.0.0-13.4.31 y 14.0.0-14.3.3. -
CVE Modified by f4fb688c-4412-4426-b4b8-421ecf27b14a
Jul. 15, 2026
Action Type Old Value New Value Changed 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. 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. -
CVE Modified by f4fb688c-4412-4426-b4b8-421ecf27b14a
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://github.com/TYPO3/typo3', 'vendor': 'TYPO3', 'modules': ['Core'], 'product': 'TYPO3 CMS', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '10.4.57', 'versionType': 'semver'}, {'status': 'affected', 'version': '11.0.0', 'lessThan': '11.5.51', 'versionType': 'semver'}, {'status': 'affected', 'version': '12.0.0', 'lessThan': '12.4.46', 'versionType': 'semver'}, {'status': 'affected', 'version': '13.0.0', 'lessThan': '13.4.31', 'versionType': 'semver'}, {'status': 'affected', 'version': '14.0.0', 'lessThan': '14.3.3', 'versionType': 'semver'}], 'packageName': 'typo3/cms-core', 'collectionURL': 'https://packagist.org', 'defaultStatus': 'unaffected'}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-49740', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-06-09T13:40:19.741208Z'} -
New CVE Received by f4fb688c-4412-4426-b4b8-421ecf27b14a
Jun. 09, 2026
Action Type Old Value New Value 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. Added CVSS V4.0 AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-502 Added Reference https://github.com/TYPO3/typo3/commit/48bcf24f31f52cc0b43d3bea4984634bd2cf85c7 Added Reference https://github.com/TYPO3/typo3/commit/87cd7c5b710c44d3606fed277b040a75dc6a9c02 Added Reference https://typo3.org/security/advisory/typo3-core-sa-2026-018