Deserialization of Untrusted Data in Mailqueue - CVE-2026-0895
Published: January 20, 2026
Vulnerability identifier: #VU121675
CSH Severity: Low
CVSS v4: 7.3 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-0895
CWE-ID: CWE-502
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to execute arbitrary code on the target system.
The vulnerability exists due to insecure input validation when processing serialized data within the FileSpool component. A local user can pass specially crafted data to the application and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
Mailqueue
How to mitigate CVE-2026-0895
Install updates from vendor's website.
Mailqueue - addressed in versions 0.4.3, 0.5.1