CVE-2026-55888 XDG Desktop Portal - Arbitrary File Access

XDG Desktop Portal < 1.22.1 contains an arbitrary file access vulnerability caused by improper validation of filenames in FileChooser.SaveFiles method, letting malicious sandboxed applications access non-existing files the user can access, exploit requires sandboxed application.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.52% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Arbitrary File Access
Impact
File System Read, File System Write
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
23 October 2026
Updated
25 October 2026
Weakness
CWE-22

Vendor fix

Update to version 1.22.1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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