Fix CVE(s): CVE-2026-66140, CVE-2026-66141
* SECURITY UPDATE: directory traversal outside the spool area through mishandled named-queue arguments, leading to privilege escalation - debian/patches/CVE-2026-66140.patch: add validate_queue_name() and apply it to both command-line sources of a queue name, -MCG and -q[f][f][l]G, rejecting a name that contains '/', is longer than 32 characters, or collides with one of the reserved spool subdirectories input, db, msglog and scan; mark -MC and every -MCx argument as admin-only and refuse them for a non-admin caller - CVE-2026-66140 * SECURITY UPDATE: .forward privilege escalation caused by expansion of the pipe command under force_command - debian/patches/CVE-2026-66141.patch: stop passing addr->local_part through expand_string() in the $address_pipe special case of a pipe transport that has force_command set, so command text supplied by a local user in a .forward file is only dequoted and split into arguments instead of being evaluated with the transport's privileges - CVE-2026-66141
- Products
- exim4, exim4-base, exim4-config, exim4-daemon-heavy, exim4-daemon-light, exim4-dev, eximon4
- Affected versions
- Not specified
- Fixed versions
- 4.93-13ubuntu1.12+tuxcare.els3
- CVEs
- CVE-2026-66140, CVE-2026-66141
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 10:59 UTC · Revision 1
Source evidence
Fix CVE(s): CVE-2026-66140, CVE-2026-66141
core-osv · Original sourcePublished 21 Aug 2026, 16:12 UTC
* SECURITY UPDATE: directory traversal outside the spool area through mishandled named-queue arguments, leading to privilege escalation - debian/patches/CVE-2026-66140.patch: add validate_queue_name() and apply it to both command-line sources of a queue name, -MCG and -q[f][f][l]G, rejecting a name that contains '/', is longer than 32 characters, or collides with one of the reserved spool subdirectories input, db, msglog and scan; mark -MC and every -MCx argument as admin-only and refuse them for a non-admin caller - CVE-2026-66140 * SECURITY UPDATE: .forward privilege escalation caused by expansion of the pipe command under force_command - debian/patches/CVE-2026-66141.patch: stop passing addr->local_part through expand_string() in the $address_pipe special case of a pipe transport that has force_command set, so command text supplied by a local user in a .forward file is only dequoted and split into arguments instead of being evaluated with the transport's privileges - CVE-2026-66141
osv:CLSA-2026-1787328725
exim4
Fixed versions: 4.93-13ubuntu1.12+tuxcare.els3
exim4-base
Fixed versions: 4.93-13ubuntu1.12+tuxcare.els3
exim4-config
Fixed versions: 4.93-13ubuntu1.12+tuxcare.els3
exim4-daemon-heavy
Fixed versions: 4.93-13ubuntu1.12+tuxcare.els3
exim4-daemon-light
Fixed versions: 4.93-13ubuntu1.12+tuxcare.els3
exim4-dev
Fixed versions: 4.93-13ubuntu1.12+tuxcare.els3
eximon4
Fixed versions: 4.93-13ubuntu1.12+tuxcare.els3
Complete source record
{
"id": "20a071528e9ee97c8f392108a835ee21973060ad0fb1e3885b10de1a021cca43",
"url": "https://osv.dev/vulnerability/CLSA-2026-1787328725",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Fix CVE(s): CVE-2026-66140, CVE-2026-66141",
"summary": "* SECURITY UPDATE: directory traversal outside the spool area through mishandled named-queue arguments, leading to privilege escalation - debian/patches/CVE-2026-66140.patch: add validate_queue_name() and apply it to both command-line sources of a queue name, -MCG and -q[f][f][l]G, rejecting a name that contains '/', is longer than 32 characters, or collides with one of the reserved spool subdirectories input, db, msglog and scan; mark -MC and every -MCx argument as admin-only and refuse them for a non-admin caller - CVE-2026-66140 * SECURITY UPDATE: .forward privilege escalation caused by expansion of the pipe command under force_command - debian/patches/CVE-2026-66141.patch: stop passing addr->local_part through expand_string() in the $address_pipe special case of a pipe transport that has force_command set, so command text supplied by a local user in a .forward file is only dequoted and split into arguments instead of being evaluated with the transport's privileges - CVE-2026-66141",
"evidence": "osv:CLSA-2026-1787328725",
"products": [
{
"name": {
"value": "exim4",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "4.93-13ubuntu1.12+tuxcare.els3",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "exim4-base",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "4.93-13ubuntu1.12+tuxcare.els3",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "exim4-config",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "4.93-13ubuntu1.12+tuxcare.els3",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "exim4-daemon-heavy",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "4.93-13ubuntu1.12+tuxcare.els3",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "exim4-daemon-light",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "4.93-13ubuntu1.12+tuxcare.els3",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "exim4-dev",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "4.93-13ubuntu1.12+tuxcare.els3",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "eximon4",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "4.93-13ubuntu1.12+tuxcare.els3",
"evidence": "/affected/6/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1787328725",
"aliases": [
"CLSA-2026-1787328725"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "4.93-13ubuntu1.12+tuxcare.els3"
}
]
}
],
"package": {
"name": "exim4",
"purl": "pkg:deb/tuxcare/exim4?distro=ubuntu-20.04",
"ecosystem": "TuxCare:Ubuntu:20.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1787328725.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "4.93-13ubuntu1.12+tuxcare.els3"
}
]
}
],
"package": {
"name": "exim4-base",
"purl": "pkg:deb/tuxcare/exim4-base?distro=ubuntu-20.04",
"ecosystem": "TuxCare:Ubuntu:20.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1787328725.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "4.93-13ubuntu1.12+tuxcare.els3"
}
]
}
],
"package": {
"name": "exim4-config",
"purl": "pkg:deb/tuxcare/exim4-config?distro=ubuntu-20.04",
"ecosystem": "TuxCare:Ubuntu:20.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1787328725.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "4.93-13ubuntu1.12+tuxcare.els3"
}
]
}
],
"package": {
"name": "exim4-daemon-heavy",
"purl": "pkg:deb/tuxcare/exim4-daemon-heavy?distro=ubuntu-20.04",
"ecosystem": "TuxCare:Ubuntu:20.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1787328725.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "4.93-13ubuntu1.12+tuxcare.els3"
}
]
}
],
"package": {
"name": "exim4-daemon-light",
"purl": "pkg:deb/tuxcare/exim4-daemon-light?distro=ubuntu-20.04",
"ecosystem": "TuxCare:Ubuntu:20.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1787328725.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "4.93-13ubuntu1.12+tuxcare.els3"
}
]
}
],
"package": {
"name": "exim4-dev",
"purl": "pkg:deb/tuxcare/exim4-dev?distro=ubuntu-20.04",
"ecosystem": "TuxCare:Ubuntu:20.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1787328725.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "4.93-13ubuntu1.12+tuxcare.els3"
}
]
}
],
"package": {
"name": "eximon4",
"purl": "pkg:deb/tuxcare/eximon4?distro=ubuntu-20.04",
"ecosystem": "TuxCare:Ubuntu:20.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1787328725.json"
}
}
],
"modified": "2026-10-26T09:31:40.157252135Z",
"provider": "osv",
"upstream": [
"CVE-2026-66140",
"CVE-2026-66141"
],
"references": [
"https://errata.tuxcare.com/els_os/ubuntu20.04els/CLSA-2026-1787328725.html",
"https://nvd.nist.gov/vuln/detail/CVE-2026-66140",
"https://nvd.nist.gov/vuln/detail/CVE-2026-66141"
]
},
"related_cves": [
{
"value": "CVE-2026-66140",
"evidence": "/upstream"
},
{
"value": "CVE-2026-66141",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 448031,
"published_at": "2026-08-21T16:12:18+00:00"
}