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CVE-2026-0859— TYPO3 CMS Allows Insecure Deserialization via Mailer File Spool

Quick assessment

Affected
TYPO3 TYPO3 CMS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

TYPO3 CMS是TYPO3开源的一个内容管理系统。 TYPO3 CMS存在安全漏洞，该漏洞源于邮件文件暂存反序列化缺陷，可能导致任意PHP代码执行。以下版本受到影响：10.0.0版本至10.4.54版本、11.0.0版本至11.5.48版本、12.0.0版本至12.4.40版本、13.0.0版本至13.4.22版本和14.0.0版本至14.0.1版本。

AI Predicted 7.8 Difficulty: Easy EPSS 0.19% · P7

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2026-0859

Vulnerability Information
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Vulnerability Title
TYPO3 CMS Allows Insecure Deserialization via Mailer File Spool
Source: CVE Program / CVE List V5
Vulnerability Description
TYPO3's mail‑file spool deserialization flaw lets local users with write access to the spool directory craft a malicious file that is deserialized during the mailer:spool:send command, enabling arbitrary PHP code execution on the web server. This issue affects TYPO3 CMS versions 10.0.0-10.4.54, 11.0.0-11.5.48, 12.0.0-12.4.40, 13.0.0-13.4.22 and 14.0.0-14.0.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5
Vulnerability Title
TYPO3 CMS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TYPO3 CMS是TYPO3开源的一个内容管理系统。 TYPO3 CMS存在安全漏洞，该漏洞源于邮件文件暂存反序列化缺陷，可能导致任意PHP代码执行。以下版本受到影响：10.0.0版本至10.4.54版本、11.0.0版本至11.5.48版本、12.0.0版本至12.4.40版本、13.0.0版本至13.4.22版本和14.0.0版本至14.0.1版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
TYPO3 TYPO3 CMS 10.0.0 ~ 10.4.55 -

II. Public POCs for CVE-2026-0859

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III. Intelligence Information for CVE-2026-0859

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Patches & Fixes for CVE-2026-0859 (1)

Same Patch Batch · TYPO3 · 2026-01-13 · 4 CVEs total

CVE-2025-59021 TYPO3 CMS Allows Broken Access Control in Redirects Module
CVE-2025-59022 TYPO3 CMS Allows Broken Access Control in Recycler Module
CVE-2025-59020 TYPO3 CMS Allows Broken Access Control in Edit Document Controller

IV. Related Vulnerabilities

Same product: TYPO3 CMS
Same vendor: TYPO3
Same weakness: CWE-502

V. Comments for CVE-2026-0859

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