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Medium

TYPO3 CMS has Insecure Deserialization via Core API

  • Disclosed: 12.06.2026
  • Updated: 11.10.2026 10:22

Problem

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.

Solution

Update to TYPO3 versions 10.4.57 ELTS, 11.5.51 ELTS, 12.4.46 ELTS, 13.4.31 LTS, 14.3.3 LTS that fix the problem described.

Credits

TYPO3 CMS thanks “z3rco”, Chowdhury Faizal Ahammed, Rick Larabee, Vitaly Simonovich, Nozomu Sasaki, Mert Akdag, “tikket”, Shafi Almutairi for reporting this issue, and to TYPO3 core & security team member Oliver Hader for fixing it.

Resources

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
Composer package typo3/cms-core < 10.4.57, >= 11.0.0, < 11.5.51, >= 12.0.0, < 12.4.46, >= 13.0.0, < 13.4.31, >= 14.0.0, < 14.3.3 10.4.57, 11.5.51, 12.4.46, 13.4.31, 14.3.3

References

CVSS score -
CVSS 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
Weakness (CWE)
CWE-502
Platform
Composer
Package
typo3/cms-core
Disclosed
12.06.2026
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-c78m-c52x-jgwp - CC BY 4.0

Vulnerability history: typo3/cms-core

All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (128) in the archive
Total entries
128
First → latest
09.2018 09.2026
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • Critical 1
  • High 35
  • Medium 84
  • Low 8

Disclosures per year

Severity:
  1. TYPO3 CMS - Broken Access Control in Backend and Install Tool
    High CVE-2026-19418 >= 14.0.0, < 14.3.6 14.3.6
  2. TYPO3 CMS has Broken Access Control in its Form Framework
    High CVE-2026-11607 < 10.4.57, >= 11.0.0, < 11.5.51, >= 12.0.0, < 12.4.46, >= 13.0.0, < 13.4.31, >= 14.0.0, < 14.3.3 10.4.57, 11.5.51, 12.4.46, 13.4.31, 14.3.3
  3. TYPO3 CMS: Destructive Actions on File Mount Folders
    High CVE-2026-47343 < 10.4.57, >= 11.0.0, < 11.5.51, >= 12.0.0, < 12.4.46, >= 13.0.0, < 13.4.31, >= 14.0.0, < 14.3.3 10.4.57, 11.5.51, 12.4.46, 13.4.31, 14.3.3
  4. TYPO3 CMS has Privilege Escalation & SQL Injection in its Form Framework
    High CVE-2026-49741 >= 14.0.0, < 14.3.3 14.3.3
  5. TYPO3 CMS has Broken Access Control in its Form Framework
    High CVE-2026-47346 < 10.4.57, >= 11.0.0, < 11.5.51, >= 12.0.0, < 12.4.46, >= 13.0.0, < 13.4.31, >= 14.0.0, < 14.3.3 10.4.57, 11.5.51, 12.4.46, 13.4.31, 14.3.3
  6. TYPO3 CMS has Broken Access Control in its Media Module
    High CVE-2026-49742 >= 11.0.0, < 11.5.51, >= 12.0.0, < 12.4.46, >= 13.0.0, < 13.4.31, >= 14.0.0, < 14.3.3 11.5.51, 12.4.46, 13.4.31, 14.3.3
  7. TYPO3 CMS has Insecure Deserialization via Core API this entry
    Medium CVE-2026-49740 < 10.4.57, >= 11.0.0, < 11.5.51, >= 12.0.0, < 12.4.46, >= 13.0.0, < 13.4.31, >= 14.0.0, < 14.3.3 10.4.57, 11.5.51, 12.4.46, 13.4.31, 14.3.3
  8. TYPO3 Allows Privilege Escalation to System Maintainer
    High · 7.2 CVE-2025-47940 >= 10.4.0, < 10.4.50, >= 11.0.0, < 11.5.44, >= 12.0.0, < 12.4.31, >= 13.0.0, < 13.4.12 10.4.50, 11.5.44, 12.4.31, 13.4.12
  9. TYPO3 Possible Insecure Deserialization in Extbase Request Handling
    High · 8.1 ghsa-5h5v-m596-r6rf >= 8.0.0, < 8.7.30, >= 9.0.0, < 9.5.12 8.7.30, 9.5.12
  10. TYPO3 Arbitrary Code Execution and Cross-Site Scripting in Backend API
    High · 8.8 ghsa-x428-565f-8xj2 >= 8.0.0, < 8.7.27, >= 9.0.0, < 9.5.8 8.7.27, 9.5.8
  11. TYPO3 Security Misconfiguration in Frontend Session Handling
    High · 8.2 ghsa-82vp-jr39-4j2j >= 8.0.0, < 8.7.27, >= 9.0.0, < 9.5.8 8.7.27, 9.5.8
  12. TYPO3 Arbitrary Code Execution via File List Module
    High · 8.8 ghsa-f9hr-7cfq-mjg2 >= 8.0.0, < 8.7.23, >= 9.0.0, < 9.5.4 8.7.23, 9.5.4
  13. TYPO3 Security Misconfiguration for Backend User Accounts
    High · 7.5 ghsa-rxc9-f2x6-qh4w >= 8.0.0, < 8.7.23, >= 9.0.0, < 9.5.4 8.7.23, 9.5.4
  14. TYPO3 Denial of Service in Frontend Record Registration
    High · 7.5 ghsa-hjx5-v9xg-7h25 >= 8.0.0, < 8.7.21, >= 7.0.0, < 7.6.32 8.7.21, 7.6.32
  15. TYPO3 Security Misconfiguration in Install Tool Cookie
    High · 7.5 ghsa-ppvg-hw62-6ph9 >= 8.0.0, < 8.7.21, >= 9.0.0, < 9.5.2, >= 7.0.0, < 7.6.32 8.7.21, 9.5.2, 7.6.32
  16. TYPO3 CMS Insecure Deserialization
    High · 7.5 ghsa-96jg-pmc4-cx39 >= 8.5.0, < 8.7.17, >= 9.0.0, < 9.3.1 8.7.17, 9.3.1
  17. TYPO3 CMS Privilege Escalation and SQL Injection
    High · 7.5 ghsa-45wj-jv2h-jwrf >= 8.5.0, < 8.7.17, >= 9.0.0, < 9.3.2 8.7.17, 9.3.2
  18. TYPO3 CMS Insecure Deserialization & Arbitrary Code Execution
    Critical · 9.8 ghsa-cc97-g92w-jm65 >= 8.0.0, < 8.7.17, >= 9.0.0, < 9.3.2, >= 7.0.0, < 7.6.30 8.7.17, 9.3.2, 7.6.30
  19. TYPO3 CMS Authentication Bypass vulnerability
    High · 7.5 ghsa-x4rj-f7m6-42c3 >= 8.0.0, < 8.7.17, >= 9.0.0, < 9.3.2, >= 7.0.0, < 7.6.30 8.7.17, 9.3.2, 7.6.30
  20. TYPO3 Install Tool vulnerable to Code Execution
    High · 7.2 CVE-2024-22188 >= 8.0.0, < 8.7.57, >= 9.0.0, < 9.5.46, >= 10.0.0, < 10.4.43, >= 11.0.0, < 11.5.35, >= 12.0.0, < 12.4.11, >= 13.0.0, < 13.0.1 8.7.57, 9.5.46, 10.4.43, 11.5.35, 12.4.11, 13.0.1
Show more (17) Showing 20 of 37

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