HighFix available
xdg-desktop-portal — security advisory
XDG Desktop Portal is a desktop integration portal. Prior to version 1.22.1, malicious sandboxed applications can use the FileChooser.SaveFiles method to gain arbitrary file access to non-existing files on the host (limited to files the user has access to). The FileChooser.SaveFiles method takes optional filenames which get appended to the selected directory by backends. The backends are supposed to check that the file does not exist yet. The filenames are not validated by the frontend and also not by common backends. This issue has been patched in version 1.22.1.
- Products
- xdg-desktop-portal
- Affected versions
- 1.16.0-2, 1.16.0-3, 1.17.0-1, 1.17.1-1, 1.17.2-1, 1.18.0-1, 1.18.1-1, 1.18.2-1, 1.18.3-1, 1.18.4-1, 1.18.4-2, 1.19.0+ds-1, 1.19.1+ds-1, 1.19.2+ds-1, 1.19.3+ds-1, 1.19.4+ds-1, 1.20.0+ds-1, 1.20.0+ds-2, 1.20.1+ds-1, 1.20.1+ds-2, 1.20.3+ds-1, 1.20.3+ds-2, 1.20.3+ds-3, 1.20.4+ds-1, 1.21.0+ds-1, 1.21.1+ds-1, 1.22.0+ds-1, 1.22.1+ds-1
- Fixed versions
- 1.22.1+ds-1
- CVEs
- CVE-2026-55888
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 08:58 UTC · Revision 1
Source evidence
XDG Desktop Portal is a desktop integration portal. Prior to version 1.22.1, malicious sandboxed applications can use the FileChooser.SaveFiles method to gain arbitrary file access to non-existing files on the host (limited to files the user has access to). The FileChooser.SaveFiles method takes optional filenames which get appended to the selected directory by backends. The backends are supposed to check that the file does not exist yet. The filenames are not validated by the frontend and also not by common backends. This issue has been patched in version 1.22.1.
osv:DEBIAN-CVE-2026-55888
xdg-desktop-portal
Fixed versions: Not specified
xdg-desktop-portal
Fixed versions: Not specified
xdg-desktop-portal
Fixed versions: 1.22.1+ds-1
Complete source record
{
"id": "06aec186760ecba04036617801dfd8a69b1a4b05602e0e163e0e4df5415fbca7",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-55888",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-55888",
"summary": "XDG Desktop Portal is a desktop integration portal. Prior to version 1.22.1, malicious sandboxed applications can use the FileChooser.SaveFiles method to gain arbitrary file access to non-existing files on the host (limited to files the user has access to). The FileChooser.SaveFiles method takes optional filenames which get appended to the selected directory by backends. The backends are supposed to check that the file does not exist yet. The filenames are not validated by the frontend and also not by common backends. This issue has been patched in version 1.22.1.",
"evidence": "osv:DEBIAN-CVE-2026-55888",
"products": [
{
"name": {
"value": "xdg-desktop-portal",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.16.0-2",
"evidence": "/affected/0/versions"
},
{
"value": "1.16.0-3",
"evidence": "/affected/0/versions"
},
{
"value": "1.17.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.17.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.17.2-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.18.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.18.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.18.2-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.18.3-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.18.4-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.18.4-2",
"evidence": "/affected/0/versions"
},
{
"value": "1.19.0+ds-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.19.1+ds-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.19.2+ds-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.19.3+ds-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.19.4+ds-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.20.0+ds-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.20.0+ds-2",
"evidence": "/affected/0/versions"
},
{
"value": "1.20.1+ds-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.20.1+ds-2",
"evidence": "/affected/0/versions"
},
{
"value": "1.20.3+ds-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.20.3+ds-2",
"evidence": "/affected/0/versions"
},
{
"value": "1.20.3+ds-3",
"evidence": "/affected/0/versions"
},
{
"value": "1.20.4+ds-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.21.0+ds-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.21.1+ds-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.22.0+ds-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.22.1+ds-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "xdg-desktop-portal",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.20.3+ds-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.20.3+ds-2",
"evidence": "/affected/1/versions"
},
{
"value": "1.20.3+ds-3",
"evidence": "/affected/1/versions"
},
{
"value": "1.20.4+ds-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.21.0+ds-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.21.1+ds-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.22.0+ds-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.22.1+ds-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "xdg-desktop-portal",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.22.1+ds-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "1.20.3+ds-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.20.3+ds-2",
"evidence": "/affected/2/versions"
},
{
"value": "1.20.3+ds-3",
"evidence": "/affected/2/versions"
},
{
"value": "1.20.4+ds-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.21.0+ds-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.21.1+ds-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.22.0+ds-1",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "DEBIAN-CVE-2026-55888",
"aliases": [
"DEBIAN-CVE-2026-55888"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "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"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "xdg-desktop-portal",
"purl": "pkg:deb/debian/xdg-desktop-portal?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"1.16.0-2",
"1.16.0-3",
"1.17.0-1",
"1.17.1-1",
"1.17.2-1",
"1.18.0-1",
"1.18.1-1",
"1.18.2-1",
"1.18.3-1",
"1.18.4-1",
"1.18.4-2",
"1.19.0+ds-1",
"1.19.1+ds-1",
"1.19.2+ds-1",
"1.19.3+ds-1",
"1.19.4+ds-1",
"1.20.0+ds-1",
"1.20.0+ds-2",
"1.20.1+ds-1",
"1.20.1+ds-2",
"1.20.3+ds-1",
"1.20.3+ds-2",
"1.20.3+ds-3",
"1.20.4+ds-1",
"1.21.0+ds-1",
"1.21.1+ds-1",
"1.22.0+ds-1",
"1.22.1+ds-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-55888.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "xdg-desktop-portal",
"purl": "pkg:deb/debian/xdg-desktop-portal?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"1.20.3+ds-1",
"1.20.3+ds-2",
"1.20.3+ds-3",
"1.20.4+ds-1",
"1.21.0+ds-1",
"1.21.1+ds-1",
"1.22.0+ds-1",
"1.22.1+ds-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-55888.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.22.1+ds-1"
}
]
}
],
"package": {
"name": "xdg-desktop-portal",
"purl": "pkg:deb/debian/xdg-desktop-portal?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1.20.3+ds-1",
"1.20.3+ds-2",
"1.20.3+ds-3",
"1.20.4+ds-1",
"1.21.0+ds-1",
"1.21.1+ds-1",
"1.22.0+ds-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-55888.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-31T09:47:25.196332164Z",
"provider": "osv",
"upstream": [
"CVE-2026-55888"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-55888"
]
},
"related_cves": [
{
"value": "CVE-2026-55888",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 442644,
"published_at": "2026-10-23T13:17:10.09+00:00"
}