CVE-2026-0895

MEDIUM

TYPO3 Extension Mailqueue < 0.4.3 and 0.5.0 < 0.5.1 - Insecure Deserialization

Title source: llm
STIX 2.1

Description

The extension extends TYPO3’ FileSpool component, which was vulnerable to Insecure Deserialization prior to TYPO3-CORE-SA-2026-004 https://typo3.org/security/advisory/typo3-core-sa-2026-004 . Since the related fix is overwritten by the extension, using the extension with a patched TYPO3 core version still allows for Insecure Deserialization, because the affected vulnerable code was extracted from TYPO3 core to the extension. More information about this vulnerability can be found in the related TYPO3 Core Security Advisory TYPO3-CORE-SA-2026-004 https://typo3.org/security/advisory/typo3-core-sa-2026-004 .

Scores

CVSS v4 5.2
EPSS 0.0012
EPSS Percentile 2.3%
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

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-502
Status published
Products (3)
cpsit/typo3-mailqueue 0 - 0.4.3Packagist
TYPO3/Extension "Mailqueue" < 0.4.3
TYPO3/Extension "Mailqueue" 0.5.0 - 0.5.1
Published Jan 20, 2026
Tracked Since Feb 18, 2026