Medium
xrdp — security advisory
xrdp is an open source RDP server. Versions through 0.10.5 allow an authenticated remote user to execute arbitrary commands on the server due to unsafe handling of the AlternateShell parameter in xrdp-sesman. When the AllowAlternateShell setting is enabled (which is the default when not explicitly configured), xrdp accepts a client-supplied AlternateShell value and executes it via /bin/sh -c during session initialization. This results in shell-interpreted execution of unsanitized, user-controlled input. This behavior effectively provides a scriptable remote command execution primitive over RDP within the security context of the authenticated user, occurring prior to normal window manager startup. This can bypass expected session initialization flows and operational assumptions that restrict execution to interactive desktop environments. This issue has been fixed in version 0.10.6.
- Products
- xrdp
- Affected versions
- 0.10.1-3, 0.10.1-3.1, 0.10.1-3.1+deb13u1build0.25.10.1, 0.10.1-4, 0.10.1-4.1, 0.10.1-4.1ubuntu0.1, 0.10.6.1-2ubuntu1, 0.6.0-1, 0.6.0-1ubuntu0.1, 0.6.0-1ubuntu0.1+esm1, 0.6.0-1ubuntu0.1+esm2, 0.6.0-1ubuntu0.1+esm3, 0.6.1-2, 0.6.1-2ubuntu0.1, 0.6.1-2ubuntu0.3, 0.6.1-2ubuntu0.3+esm1, 0.6.1-2ubuntu0.3+esm2, 0.6.1-2ubuntu0.3+esm3, 0.9.1-9, 0.9.12-1, 0.9.12-1ubuntu0.1, 0.9.12-1ubuntu0.1+esm1, 0.9.12-1ubuntu0.1+esm2, 0.9.15-1ubuntu1, 0.9.17-1, 0.9.17-2, 0.9.17-2ubuntu1, 0.9.17-2ubuntu2, 0.9.17-2ubuntu2+esm1, 0.9.17-2ubuntu3, 0.9.17-2ubuntu3+esm1, 0.9.17-2ubuntu3+esm2, 0.9.17-2ubuntu3.1, 0.9.21.1-1, 0.9.24-2, 0.9.24-3, 0.9.24-3build1, 0.9.24-3build2, 0.9.24-4, 0.9.24-4ubuntu0.1, 0.9.24-4ubuntu0.1~esm1, 0.9.4-1, 0.9.4-2, 0.9.4-3, 0.9.4-4, 0.9.4-5, 0.9.5-1, 0.9.5-1build1, 0.9.5-2, 0.9.5-2ubuntu0.1~esm1, 0.9.5-2ubuntu0.1~esm2, 0.9.5-2ubuntu0.1~esm3, 0.9.9-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-33145
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:07 UTC · Revision 1
Source evidence
xrdp is an open source RDP server. Versions through 0.10.5 allow an authenticated remote user to execute arbitrary commands on the server due to unsafe handling of the AlternateShell parameter in xrdp-sesman. When the AllowAlternateShell setting is enabled (which is the default when not explicitly configured), xrdp accepts a client-supplied AlternateShell value and executes it via /bin/sh -c during session initialization. This results in shell-interpreted execution of unsanitized, user-controlled input. This behavior effectively provides a scriptable remote command execution primitive over RDP within the security context of the authenticated user, occurring prior to normal window manager startup. This can bypass expected session initialization flows and operational assumptions that restrict execution to interactive desktop environments. This issue has been fixed in version 0.10.6.
osv:UBUNTU-CVE-2026-33145
xrdp
Fixed versions: Not specified
xrdp
Fixed versions: Not specified
xrdp
Fixed versions: Not specified
xrdp
Fixed versions: Not specified
xrdp
Fixed versions: Not specified
xrdp
Fixed versions: Not specified
xrdp
Fixed versions: Not specified
xrdp
Fixed versions: Not specified
xrdp
Fixed versions: Not specified
Complete source record
{
"id": "3a79a80f1220960e552197fdd2ff5f188a580298de17e1eb35de1177d76ab63e",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-33145",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-33145",
"summary": "xrdp is an open source RDP server. Versions through 0.10.5 allow an authenticated remote user to execute arbitrary commands on the server due to unsafe handling of the AlternateShell parameter in xrdp-sesman. When the AllowAlternateShell setting is enabled (which is the default when not explicitly configured), xrdp accepts a client-supplied AlternateShell value and executes it via /bin/sh -c during session initialization. This results in shell-interpreted execution of unsanitized, user-controlled input. This behavior effectively provides a scriptable remote command execution primitive over RDP within the security context of the authenticated user, occurring prior to normal window manager startup. This can bypass expected session initialization flows and operational assumptions that restrict execution to interactive desktop environments. This issue has been fixed in version 0.10.6.",
"evidence": "osv:UBUNTU-CVE-2026-33145",
"products": [
{
"name": {
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},
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"affected_versions": [
{
"value": "0.6.0-1",
"evidence": "/affected/0/versions"
},
{
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"evidence": "/affected/0/versions"
},
{
"value": "0.6.0-1ubuntu0.1+esm1",
"evidence": "/affected/0/versions"
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{
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{
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{
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{
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{
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{
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{
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{
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{
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"affected_versions": [
{
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"evidence": "/affected/3/versions"
},
{
"value": "0.9.12-1",
"evidence": "/affected/3/versions"
},
{
"value": "0.9.12-1ubuntu0.1",
"evidence": "/affected/3/versions"
},
{
"value": "0.9.12-1ubuntu0.1+esm1",
"evidence": "/affected/3/versions"
},
{
"value": "0.9.12-1ubuntu0.1+esm2",
"evidence": "/affected/3/versions"
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]
},
{
"name": {
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"evidence": "/affected/4/package/name"
},
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"affected_versions": [
{
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"evidence": "/affected/4/versions"
},
{
"value": "0.9.17-1",
"evidence": "/affected/4/versions"
},
{
"value": "0.9.17-2",
"evidence": "/affected/4/versions"
},
{
"value": "0.9.17-2ubuntu1",
"evidence": "/affected/4/versions"
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{
"value": "0.9.17-2ubuntu2",
"evidence": "/affected/4/versions"
},
{
"value": "0.9.17-2ubuntu2+esm1",
"evidence": "/affected/4/versions"
},
{
"value": "0.9.17-2ubuntu3",
"evidence": "/affected/4/versions"
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{
"value": "0.9.17-2ubuntu3+esm1",
"evidence": "/affected/4/versions"
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{
"value": "0.9.17-2ubuntu3+esm2",
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{
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{
"name": {
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},
"prerequisites": [],
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{
"value": "0.9.21.1-1",
"evidence": "/affected/5/versions"
},
{
"value": "0.9.24-2",
"evidence": "/affected/5/versions"
},
{
"value": "0.9.24-3",
"evidence": "/affected/5/versions"
},
{
"value": "0.9.24-3build1",
"evidence": "/affected/5/versions"
},
{
"value": "0.9.24-3build2",
"evidence": "/affected/5/versions"
},
{
"value": "0.9.24-4",
"evidence": "/affected/5/versions"
},
{
"value": "0.9.24-4ubuntu0.1~esm1",
"evidence": "/affected/5/versions"
},
{
"value": "0.9.24-4ubuntu0.1",
"evidence": "/affected/5/versions"
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{
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{
"value": "0.10.1-4.1",
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},
{
"value": "0.10.6.1-2ubuntu1",
"evidence": "/affected/7/versions"
}
]
},
{
"name": {
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"evidence": "/affected/8/package/name"
},
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{
"value": "0.10.1-3.1",
"evidence": "/affected/8/versions"
},
{
"value": "0.10.1-4",
"evidence": "/affected/8/versions"
},
{
"value": "0.10.1-4.1",
"evidence": "/affected/8/versions"
},
{
"value": "0.10.1-4.1ubuntu0.1",
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}
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],
"severity": "medium",
"structured": {
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"aliases": [
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],
"metrics": [
{
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"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
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{
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}
]
}
],
"package": {
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"ecosystem": "Ubuntu:Pro:14.04:LTS"
},
"versions": [
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"0.6.0-1ubuntu0.1",
"0.6.0-1ubuntu0.1+esm1",
"0.6.0-1ubuntu0.1+esm2",
"0.6.0-1ubuntu0.1+esm3"
],
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},
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{
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{
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{
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}
]
}
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{
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},
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"0.9.12-1",
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"0.9.12-1ubuntu0.1+esm1",
"0.9.12-1ubuntu0.1+esm2"
],
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},
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},
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"0.9.17-1",
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"0.9.17-2ubuntu3",
"0.9.17-2ubuntu3+esm1",
"0.9.17-2ubuntu3+esm2",
"0.9.17-2ubuntu3.1"
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},
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},
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}
]
}
},
{
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],
"package": {
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"ecosystem": "Ubuntu:25.10"
},
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],
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},
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{
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},
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},
"ecosystem_specific": {
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{
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}
},
{
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],
"package": {
"name": "xrdp",
"purl": "pkg:deb/ubuntu/xrdp?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
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"0.10.1-4",
"0.10.1-4.1",
"0.10.1-4.1ubuntu0.1"
],
"database_specific": {
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},
"ecosystem_specific": {
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{
"binary_name": "xrdp",
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}
]
}
}
],
"modified": "2026-10-17T12:58:10.100626382Z",
"provider": "osv",
"upstream": [
"CVE-2026-33145"
],
"references": [
"https://ubuntu.com/security/CVE-2026-33145",
"https://www.cve.org/CVERecord?id=CVE-2026-33145",
"https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-rmvv-7633-fg7h"
]
},
"related_cves": [
{
"value": "CVE-2026-33145",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 358260,
"published_at": "2026-04-17T21:16:00+00:00"
}