CVE-2026-40354 | BDVDB-2026-326452 Detail

Flatpakxdg-desktop-portal

Description#

Flatpak xdg-desktop-portal before 1.20.4 and 1.21.x before 1.21.1 allows any Flatpak app to trash any file in the host context via a symlink attack on g_file_trash.

Impact#

Per CVSS v3.1: confidentiality impact none, integrity impact none, availability impact low. Attack vector: local.

Weaknesses#

CWE-61 UNIX Symbolic Link (Symlink) Following

References#

Exploit#

No public exploit known

History#

Version 12026-04-11Record published in the CVE List.
Version 22026-04-15Most recent update recorded in the CVE List.

Published

Published: 2026-04-11
Last modified: 2026-04-15

Vendor information

Vendor: Flatpak
Product: xdg-desktop-portal

All Flatpak vulnerabilities

Score

2.9 Low

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 2.8.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
< 1.20.4
Fixed
1.20.4
Vulnerable
>= 1.21.0 and < 1.21.1
Fixed
1.21.1

Scoring System

CVSS v4.0

Not available

CVSS v3.1

2.9 Low

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Metric breakdown
Attack Vector	Local
Attack Complexity	High
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	None
Integrity	None
Availability	Low

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).