xdg-utils — security advisory
When xdg-mail is configured to use thunderbird for mailto URLs, improper parsing of the URL can lead to additional headers being passed to thunderbird that should not be included per RFC 2368. An attacker can use this method to create a mailto URL that looks safe to users, but will actually attach files when clicked.
- Products
- xdg-utils
- Affected versions
- 1.1.3-4.1, 1.2.1-1, 1.2.1-2
- Fixed versions
- Not specified
- CVEs
- CVE-2022-4055
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 30 Oct 2026, 15:21 UTC · Revision 1
Source evidence
When xdg-mail is configured to use thunderbird for mailto URLs, improper parsing of the URL can lead to additional headers being passed to thunderbird that should not be included per RFC 2368. An attacker can use this method to create a mailto URL that looks safe to users, but will actually attach files when clicked.
osv:DEBIAN-CVE-2022-4055
xdg-utils
Fixed versions: Not specified
xdg-utils
Fixed versions: Not specified
xdg-utils
Fixed versions: Not specified
Complete source record
{
"id": "0f1650278199076a40a493688bfa2b7f8b82994052e38d27778a02ae22d5cefd",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2022-4055",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2022-4055",
"summary": "When xdg-mail is configured to use thunderbird for mailto URLs, improper parsing of the URL can lead to additional headers being passed to thunderbird that should not be included per RFC 2368. An attacker can use this method to create a mailto URL that looks safe to users, but will actually attach files when clicked.",
"evidence": "osv:DEBIAN-CVE-2022-4055",
"products": [
{
"name": {
"value": "xdg-utils",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.1.3-4.1",
"evidence": "/affected/0/versions"
},
{
"value": "1.2.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.2.1-2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "xdg-utils",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
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"evidence": "/affected/1/versions"
}
]
},
{
"name": {
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"evidence": "/affected/2/package/name"
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"affected_versions": [
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}
]
}
],
"severity": "high",
"structured": {
"id": "DEBIAN-CVE-2022-4055",
"aliases": [
"DEBIAN-CVE-2022-4055"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
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"introduced": "0"
}
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],
"package": {
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"purl": "pkg:deb/debian/xdg-utils?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
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"1.2.1-1",
"1.2.1-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-4055.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "xdg-utils",
"purl": "pkg:deb/debian/xdg-utils?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"1.2.1-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-4055.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
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}
],
"package": {
"name": "xdg-utils",
"purl": "pkg:deb/debian/xdg-utils?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
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],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-4055.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-15T08:02:54.384048568Z",
"provider": "osv",
"upstream": [
"CVE-2022-4055"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2022-4055"
]
},
"related_cves": [
{
"value": "CVE-2022-4055",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 324558,
"published_at": "2022-11-19T00:15:31.003+00:00"
}