CVE-2026-1323Insecure Deserialization in extension "Mailqueue" (mailqueue)

Description

The extension fails to properly define allowed classes used when deserializing transport failure metadata. An attacker may exploit this to execute untrusted serialized code. Note that an active exploit requires write access to the directory configured at $GLOBALS['TYPO3_CONF_VARS']['MAIL']['transport_spool_filepath'].

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

References and patches

• https://typo3.org/security/advisory/typo3-ext-sa-2026-005 vendor-advisoryVendor Advisory