Security Advisory
CVE-2026-1323
CVE vulnerability detail — eXtreme Datacenter Security Operations
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].