High
lrzsz — security advisory
lrzsz before 0.13.0 contains an OS command injection vulnerability in the lrz receive utility's pipe mode that allows remote senders to execute commands by supplying crafted filenames. When lrz runs under a suffixed name such as lrztar, procheader() in src/lrz.c passes the unescaped ZMODEM/YMODEM filename to popen(), so shell metacharacters execute as the receiving user.
- Products
- lrzsz
- Affected versions
- 0.12.21-10, 0.12.21-10~build0.14.04.1, 0.12.21-10~build0.16.04.1, 0.12.21-10~build0.18.04.1, 0.12.21-11, 0.12.21-11build1, 0.12.21-5, 0.12.21-7, 0.12.21-8, 0.12.21-8build1, 0.12.21rc-0.2, 0.12.21rc-0.3, 0.12.21rc-1, 0.12.21rc-2, 0.12.21rc-4
- Fixed versions
- Not specified
- CVEs
- CVE-2026-105841
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:40 UTC · Revision 1
Source evidence
lrzsz before 0.13.0 contains an OS command injection vulnerability in the lrz receive utility's pipe mode that allows remote senders to execute commands by supplying crafted filenames. When lrz runs under a suffixed name such as lrztar, procheader() in src/lrz.c passes the unescaped ZMODEM/YMODEM filename to popen(), so shell metacharacters execute as the receiving user.
osv:UBUNTU-CVE-2026-105841
lrzsz
Fixed versions: Not specified
lrzsz
Fixed versions: Not specified
lrzsz
Fixed versions: Not specified
lrzsz
Fixed versions: Not specified
lrzsz
Fixed versions: Not specified
lrzsz
Fixed versions: Not specified
lrzsz
Fixed versions: Not specified
lrzsz
Fixed versions: Not specified
Complete source record
{
"id": "36b20bd0619c3c21d5cd768f4d36215972c6bb029b80b810cf83ef3c67d1f7b4",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-105841",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-105841",
"summary": "lrzsz before 0.13.0 contains an OS command injection vulnerability in the lrz receive utility's pipe mode that allows remote senders to execute commands by supplying crafted filenames. When lrz runs under a suffixed name such as lrztar, procheader() in src/lrz.c passes the unescaped ZMODEM/YMODEM filename to popen(), so shell metacharacters execute as the receiving user.",
"evidence": "osv:UBUNTU-CVE-2026-105841",
"products": [
{
"name": {
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"evidence": "/affected/0/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "0.12.21-5",
"evidence": "/affected/0/versions"
},
{
"value": "0.12.21-7",
"evidence": "/affected/0/versions"
},
{
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"evidence": "/affected/0/versions"
}
]
},
{
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},
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"evidence": "/affected/2/versions"
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{
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{
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},
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},
{
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"evidence": "/affected/5/versions"
},
{
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"evidence": "/affected/5/versions"
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},
{
"name": {
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"evidence": "/affected/6/package/name"
},
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"affected_versions": [
{
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"evidence": "/affected/6/versions"
},
{
"value": "0.12.21rc-1",
"evidence": "/affected/6/versions"
},
{
"value": "0.12.21rc-2",
"evidence": "/affected/6/versions"
},
{
"value": "0.12.21rc-4",
"evidence": "/affected/6/versions"
}
]
},
{
"name": {
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"evidence": "/affected/7/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "0.12.21rc-0.2",
"evidence": "/affected/7/versions"
},
{
"value": "0.12.21rc-0.3",
"evidence": "/affected/7/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2026-105841",
"aliases": [
"UBUNTU-CVE-2026-105841"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"
},
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
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],
"package": {
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"ecosystem": "Ubuntu:14.04:LTS"
},
"versions": [
"0.12.21-5",
"0.12.21-7",
"0.12.21-10~build0.14.04.1"
],
"database_specific": {
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},
"ecosystem_specific": {
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"binary_version": "0.12.21-10~build0.14.04.1"
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]
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},
{
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}
],
"package": {
"name": "lrzsz",
"purl": "pkg:deb/ubuntu/lrzsz?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
"0.12.21-8",
"0.12.21-10~build0.16.04.1"
],
"database_specific": {
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},
"ecosystem_specific": {
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{
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],
"package": {
"name": "lrzsz",
"purl": "pkg:deb/ubuntu/lrzsz?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"0.12.21-8",
"0.12.21-8build1",
"0.12.21-10~build0.18.04.1"
],
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{
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"package": {
"name": "lrzsz",
"purl": "pkg:deb/ubuntu/lrzsz?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
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"0.12.21-10"
],
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},
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"0.12.21-10"
],
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"name": "lrzsz",
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"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"0.12.21-10",
"0.12.21-11",
"0.12.21-11build1"
],
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"package": {
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"purl": "pkg:deb/ubuntu/lrzsz?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
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"0.12.21rc-2",
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],
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}
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],
"modified": "2026-10-17T12:58:43.603110049Z",
"provider": "osv",
"upstream": [
"CVE-2026-105841"
],
"references": [
"https://ubuntu.com/security/CVE-2026-105841",
"https://www.cve.org/CVERecord?id=CVE-2026-105841",
"https://ohse.de/uwe/software/lrzsz/NEWS-0.13.0.html"
]
},
"related_cves": [
{
"value": "CVE-2026-105841",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/1/score"
},
"source_id": "core-osv",
"document_id": 358985,
"published_at": "2026-10-06T14:17:00+00:00"
}