Critical
Security advisory
The CalDAV feature in httpd in Cyrus IMAP 2.5.x through 2.5.12 and 3.0.x through 3.0.9 allows remote attackers to execute arbitrary code via a crafted HTTP PUT operation for an event with a long iCalendar property name.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2019-11356
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 06:13 UTC · Revision 1
Source evidence
The CalDAV feature in httpd in Cyrus IMAP 2.5.x through 2.5.12 and 3.0.x through 3.0.9 allows remote attackers to execute arbitrary code via a crafted HTTP PUT operation for an event with a long iCalendar property name.
osv:CVE-2019-11356
Complete source record
{
"id": "54ee83257563bb7922ad4a80577750e355416d0ac3573eea431434d2af40a36d",
"url": "https://osv.dev/vulnerability/CVE-2019-11356",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2019-11356",
"summary": "The CalDAV feature in httpd in Cyrus IMAP 2.5.x through 2.5.12 and 3.0.x through 3.0.9 allows remote attackers to execute arbitrary code via a crafted HTTP PUT operation for an event with a long iCalendar property name.",
"evidence": "osv:CVE-2019-11356",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2019-11356",
"aliases": [
"CVE-2019-11356"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/cyrusimap/cyrus-imapd",
"type": "GIT",
"events": [
{
"introduced": "5549888feb02784120b7ef0c8a26390b83125108"
},
{
"last_affected": "a4c4768f5eb8f1acb97b303aa3af3d26ef737612"
},
{
"introduced": "65c252b8a3a05c09b3425ce96e1dc6a11dabbe4a"
},
{
"last_affected": "fd5a57bcb4f7b32b330fd2b477d9e700e91ccf61"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:cyrus:imap:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.5.0"
},
{
"last_affected": "2.5.12"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:cyrus:imap:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "3.0.0"
},
{
"last_affected": "3.0.9"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"cyrus-imapd-3.0.9",
"cyrus-imapd-2.5.12",
"cyrus-imapd-3.0.8",
"cyrus-imapd-3.0.7",
"cyrus-imapd-3.0.6",
"cyrus-imapd-3.0.5",
"cyrus-imapd-3.0.4",
"cyrus-imapd-3.0.3",
"cyrus-imapd-3.0.2",
"cyrus-imapd-2.5.11",
"cyrus-imapd-3.0.1",
"cyrus-imapd-3.0.0",
"cyrus-imapd-2.5.10",
"cyrus-imapd-2.5.9",
"cyrus-imapd-2.5.8",
"cyrus-imapd-2.5.7",
"cyrus-imapd-2.5.6",
"cyrus-imapd-2.5.5",
"cyrus-imapd-2.5.4",
"cyrus-imapd-2.5.3",
"cyrus-imapd-2.5.2",
"cyrus-imapd-2.5.1",
"cyrus-imapd-2.5.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-11356.json"
}
}
],
"modified": "2026-10-24T10:30:36.984451703Z",
"provider": "osv",
"references": [
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IGO43JS7IFDNITHXOOHOP6JHRKRDIYY6/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PICSZDC3UGEUZ27VXGGM6OFI67D3KKLZ/",
"https://access.redhat.com/errata/RHSA-2019:1771",
"https://seclists.org/bugtraq/2019/Jun/9",
"https://usn.ubuntu.com/4566-1/",
"https://www.cyrusimap.org/imap/download/release-notes/2.5/index.html",
"https://www.cyrusimap.org/imap/download/release-notes/2.5/x/2.5.13.html",
"https://www.cyrusimap.org/imap/download/release-notes/3.0/index.html",
"https://www.cyrusimap.org/imap/download/release-notes/3.0/x/3.0.10.html",
"https://www.debian.org/security/2019/dsa-4458"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*"
],
"vendor_product": "canonical:ubuntu_linux",
"extracted_events": [
{
"range": [
{
"introduced": "18.04"
},
{
"last_affected": "18.04"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
],
"vendor_product": "debian:debian_linux",
"extracted_events": [
{
"range": [
{
"introduced": "9.0"
},
{
"last_affected": "9.0"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*",
"cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*"
],
"vendor_product": "fedoraproject:fedora",
"extracted_events": [
{
"range": [
{
"introduced": "29"
},
{
"last_affected": "29"
},
{
"introduced": "30"
},
{
"last_affected": "30"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:enterprise_linux",
"extracted_events": [
{
"range": [
{
"introduced": "8.0"
},
{
"last_affected": "8.0"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:redhat:enterprise_linux_eus:8.1:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_eus:8.2:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_eus:8.4:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:enterprise_linux_eus",
"extracted_events": [
{
"range": [
{
"introduced": "8.1"
},
{
"last_affected": "8.1"
},
{
"introduced": "8.2"
},
{
"last_affected": "8.2"
},
{
"introduced": "8.4"
},
{
"last_affected": "8.4"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:redhat:enterprise_linux_server_aus:8.2:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_server_aus:8.4:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:enterprise_linux_server_aus",
"extracted_events": [
{
"range": [
{
"introduced": "8.2"
},
{
"last_affected": "8.2"
},
{
"introduced": "8.4"
},
{
"last_affected": "8.4"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:redhat:enterprise_linux_server_tus:8.2:*:*:*:*:*:*:*",
"cpe:2.3:o:redhat:enterprise_linux_server_tus:8.4:*:*:*:*:*:*:*"
],
"vendor_product": "redhat:enterprise_linux_server_tus",
"extracted_events": [
{
"range": [
{
"introduced": "8.2"
},
{
"last_affected": "8.2"
},
{
"introduced": "8.4"
},
{
"last_affected": "8.4"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2019-11356",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 434108,
"published_at": "2019-06-03T20:29:00.297+00:00"
}