Vulnerability · Published Apr 17, 2026 · Assigned by GitHub_M
CVE-2026-33145xrdp: Authenticated RCE via unsanitized AlternateShell execution in xrdp-sesman
Medium 6.3
In plain English
A medium-severity OS command injection in xrdp from neutrinolabs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.23 | xrdp | 0.10.6-r0 | ALPINE-CVE-2026-33145 |
| Alpine:v3.24 | xrdp | 0.10.6-r0 | ALPINE-CVE-2026-33145 |
| Debian:12 | xrdp | no fix listed | DEBIAN-CVE-2026-33145 |
| Debian:13 | xrdp | 0.10.1-3.1+deb13u2 | DEBIAN-CVE-2026-33145 |
| Debian:14 | xrdp | 0.10.6-1 | DEBIAN-CVE-2026-33145 |
| Ubuntu:22.04:LTS | xrdp | no fix listed | UBUNTU-CVE-2026-33145 |
| Ubuntu:24.04:LTS | xrdp | no fix listed | UBUNTU-CVE-2026-33145 |
| Ubuntu:25.10 | xrdp | no fix listed | UBUNTU-CVE-2026-33145 |
| Ubuntu:26.04:LTS | xrdp | no fix listed | UBUNTU-CVE-2026-33145 |
| Ubuntu:26.10 | xrdp | no fix listed | UBUNTU-CVE-2026-33145 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| neutrinolabs | xrdp | < 0.10.6 |
Weakness: CWE-78 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
References
- https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-rmvv-7633-fg7h x_refsource_CONFIRM
- https://github.com/neutrinolabs/xrdp/releases/tag/v0.10.6 x_refsource_MISC