cyrus-imapd: Fix of 3 CVEs
- fix CVE-2026-61915: double-free in the CalDAV VPATCH BYPARAM selector - fix CVE-2026-61909: calendar/addressbook-multiget returned resources the user has no ACL on - fix CVE-2026-61911: Sieve mailboxexists/metadata probed other users' mailboxes without a lookup-rights check - do not free VPATCH parameters already removed by reference: libical frees them in icalproperty_remove_parameter_by_ref(), so the following icalparameter_free() aborted the CalDAV worker on any VPATCH carrying a PATCH-ACTION parameter, before the CVE-2026-61915 code path could be reached - add the upstream cunit regression test for CVE-2026-61915 - run the cunit suite in %check even when cassandane is disabled, so the regression test above actually executes
- Products
- cyrus-imapd, cyrus-imapd-devel, cyrus-imapd-doc-extra, cyrus-imapd-libs, cyrus-imapd-utils, cyrus-imapd-virusscan, perl-Cyrus
- Affected versions
- Not specified
- Fixed versions
- 3.4.8-2.el9_6.tuxcare.els1
- CVEs
- CVE-2026-61909, CVE-2026-61911, CVE-2026-61915
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 11:52 UTC · Revision 1
Source evidence
- fix CVE-2026-61915: double-free in the CalDAV VPATCH BYPARAM selector - fix CVE-2026-61909: calendar/addressbook-multiget returned resources the user has no ACL on - fix CVE-2026-61911: Sieve mailboxexists/metadata probed other users' mailboxes without a lookup-rights check - do not free VPATCH parameters already removed by reference: libical frees them in icalproperty_remove_parameter_by_ref(), so the following icalparameter_free() aborted the CalDAV worker on any VPATCH carrying a PATCH-ACTION parameter, before the CVE-2026-61915 code path could be reached - add the upstream cunit regression test for CVE-2026-61915 - run the cunit suite in %check even when cassandane is disabled, so the regression test above actually executes
osv:CLSA-2026-1790173408
cyrus-imapd
Fixed versions: 3.4.8-2.el9_6.tuxcare.els1
cyrus-imapd-devel
Fixed versions: 3.4.8-2.el9_6.tuxcare.els1
cyrus-imapd-doc-extra
Fixed versions: 3.4.8-2.el9_6.tuxcare.els1
cyrus-imapd-libs
Fixed versions: 3.4.8-2.el9_6.tuxcare.els1
cyrus-imapd-utils
Fixed versions: 3.4.8-2.el9_6.tuxcare.els1
cyrus-imapd-virusscan
Fixed versions: 3.4.8-2.el9_6.tuxcare.els1
perl-Cyrus
Fixed versions: 3.4.8-2.el9_6.tuxcare.els1
Complete source record
{
"id": "88d618757fa88fa44f7f2cfd71b0827fe596007d061b846a53ed16d5fc21ae54",
"url": "https://osv.dev/vulnerability/CLSA-2026-1790173408",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "cyrus-imapd: Fix of 3 CVEs",
"summary": "- fix CVE-2026-61915: double-free in the CalDAV VPATCH BYPARAM selector - fix CVE-2026-61909: calendar/addressbook-multiget returned resources the user has no ACL on - fix CVE-2026-61911: Sieve mailboxexists/metadata probed other users' mailboxes without a lookup-rights check - do not free VPATCH parameters already removed by reference: libical frees them in icalproperty_remove_parameter_by_ref(), so the following icalparameter_free() aborted the CalDAV worker on any VPATCH carrying a PATCH-ACTION parameter, before the CVE-2026-61915 code path could be reached - add the upstream cunit regression test for CVE-2026-61915 - run the cunit suite in %check even when cassandane is disabled, so the regression test above actually executes",
"evidence": "osv:CLSA-2026-1790173408",
"products": [
{
"name": {
"value": "cyrus-imapd",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.4.8-2.el9_6.tuxcare.els1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "cyrus-imapd-devel",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.4.8-2.el9_6.tuxcare.els1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
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"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.4.8-2.el9_6.tuxcare.els1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "cyrus-imapd-libs",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.4.8-2.el9_6.tuxcare.els1",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "cyrus-imapd-utils",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.4.8-2.el9_6.tuxcare.els1",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "cyrus-imapd-virusscan",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.4.8-2.el9_6.tuxcare.els1",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "perl-Cyrus",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.4.8-2.el9_6.tuxcare.els1",
"evidence": "/affected/6/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1790173408",
"aliases": [
"CLSA-2026-1790173408"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.4.8-2.el9_6.tuxcare.els1"
}
]
}
],
"package": {
"name": "cyrus-imapd",
"purl": "pkg:rpm/tuxcare/cyrus-imapd?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1790173408.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.4.8-2.el9_6.tuxcare.els1"
}
]
}
],
"package": {
"name": "cyrus-imapd-devel",
"purl": "pkg:rpm/tuxcare/cyrus-imapd-devel?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1790173408.json"
}
},
{
"ranges": [
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{
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}
]
}
],
"package": {
"name": "cyrus-imapd-doc-extra",
"purl": "pkg:rpm/tuxcare/cyrus-imapd-doc-extra?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1790173408.json"
}
},
{
"ranges": [
{
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"events": [
{
"introduced": "0"
},
{
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}
]
}
],
"package": {
"name": "cyrus-imapd-libs",
"purl": "pkg:rpm/tuxcare/cyrus-imapd-libs?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1790173408.json"
}
},
{
"ranges": [
{
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{
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},
{
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}
]
}
],
"package": {
"name": "cyrus-imapd-utils",
"purl": "pkg:rpm/tuxcare/cyrus-imapd-utils?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1790173408.json"
}
},
{
"ranges": [
{
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{
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{
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}
]
}
],
"package": {
"name": "cyrus-imapd-virusscan",
"purl": "pkg:rpm/tuxcare/cyrus-imapd-virusscan?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1790173408.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.4.8-2.el9_6.tuxcare.els1"
}
]
}
],
"package": {
"name": "perl-Cyrus",
"purl": "pkg:rpm/tuxcare/perl-Cyrus?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1790173408.json"
}
}
],
"modified": "2026-10-26T09:43:36.723242991Z",
"provider": "osv",
"upstream": [
"CVE-2026-61909",
"CVE-2026-61911",
"CVE-2026-61915"
],
"references": [
"https://errata.tuxcare.com/els_os/tuxcare9.6esu/CLSA-2026-1790173408.html",
"https://nvd.nist.gov/vuln/detail/CVE-2026-61909",
"https://nvd.nist.gov/vuln/detail/CVE-2026-61911",
"https://nvd.nist.gov/vuln/detail/CVE-2026-61915"
]
},
"related_cves": [
{
"value": "CVE-2026-61909",
"evidence": "/upstream"
},
{
"value": "CVE-2026-61911",
"evidence": "/upstream"
},
{
"value": "CVE-2026-61915",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 450028,
"published_at": "2026-09-23T14:23:39+00:00"
}