CVE-2018-18398: Xfce Thunar

Medium severity, CVSS 4.7. EPSS: 0.3% chance of exploitation in the next 30 days.

Xfce Thunar 1.6.15, when Xfce 4.12 is used, mishandles the IBus-Unikey input method for file searches within File Manager, leading to an out-of-bounds read and SEGV. This could potentially be exploited by an arbitrary local user who creates files in /tmp before the victim uses this input method.

Affected products

• Xfce Thunar: before 1.6.15 (fixed in 1.6.15)
• Xfce Xfce: before 4.12 (fixed in 4.12)

Published 2018-10-19. Last modified 2026-06-17.