MediumFix available
claws-mail, sylpheed — security advisory
textview_uri_security_check in textview.c in Claws Mail before 3.18.0, and Sylpheed through 3.7.0, does not have sufficient link checks before accepting a click.
- Products
- claws-mail, sylpheed
- Affected versions
- 3.8.0~beta1-1, 3.8.0~beta1-2
- Fixed versions
- 3.18.0-1, 3.8.0~beta1-1+deb12u1, 3.8.0~beta1-2+deb13u1
- CVEs
- CVE-2021-37746
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 00:43 UTC · Revision 1
Source evidence
textview_uri_security_check in textview.c in Claws Mail before 3.18.0, and Sylpheed through 3.7.0, does not have sufficient link checks before accepting a click.
osv:DEBIAN-CVE-2021-37746
claws-mail
Fixed versions: 3.18.0-1
claws-mail
Fixed versions: 3.18.0-1
claws-mail
Fixed versions: 3.18.0-1
sylpheed
Fixed versions: 3.8.0~beta1-1+deb12u1
sylpheed
Fixed versions: 3.8.0~beta1-2+deb13u1
Complete source record
{
"id": "f4cd180ad51368684dca008ea2089b8d74e1114966869b0dc54ffa35c042980b",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2021-37746",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2021-37746",
"summary": "textview_uri_security_check in textview.c in Claws Mail before 3.18.0, and Sylpheed through 3.7.0, does not have sufficient link checks before accepting a click.",
"evidence": "osv:DEBIAN-CVE-2021-37746",
"products": [
{
"name": {
"value": "claws-mail",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.18.0-1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "claws-mail",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.18.0-1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "claws-mail",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.18.0-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "sylpheed",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.8.0~beta1-1+deb12u1",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": [
{
"value": "3.8.0~beta1-1",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "sylpheed",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.8.0~beta1-2+deb13u1",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": [
{
"value": "3.8.0~beta1-2",
"evidence": "/affected/4/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2021-37746",
"aliases": [
"DEBIAN-CVE-2021-37746"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.18.0-1"
}
]
}
],
"package": {
"name": "claws-mail",
"purl": "pkg:deb/debian/claws-mail?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-37746.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.18.0-1"
}
]
}
],
"package": {
"name": "claws-mail",
"purl": "pkg:deb/debian/claws-mail?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-37746.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.18.0-1"
}
]
}
],
"package": {
"name": "claws-mail",
"purl": "pkg:deb/debian/claws-mail?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-37746.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.8.0~beta1-1+deb12u1"
}
]
}
],
"package": {
"name": "sylpheed",
"purl": "pkg:deb/debian/sylpheed?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"3.8.0~beta1-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-37746.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.8.0~beta1-2+deb13u1"
}
]
}
],
"package": {
"name": "sylpheed",
"purl": "pkg:deb/debian/sylpheed?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"3.8.0~beta1-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-37746.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-23T18:03:38.230568107Z",
"provider": "osv",
"upstream": [
"CVE-2021-37746"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2021-37746"
]
},
"related_cves": [
{
"value": "CVE-2021-37746",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 422080,
"published_at": "2021-07-30T15:15:09.333+00:00"
}