CVE-2026-49950: Deserialization of Untrusted Data in xorbitsai xoscar
Description
Xorbits Xoscar versions 0.1.0 through 0.11.2 contain an unauthenticated deserialization vulnerability that allows remote attackers to execute arbitrary code. The flaw arises from unvalidated data being passed to cloudpickle.loads() in the actor-pool TCP channel before message type validation. This can lead to remote code execution as the server process, which often runs with root privileges on GPU nodes.
CVSS v4.0
Score 9.3critical
Affected software
xorbitsai
xoscar
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-49950 is a critical unauthenticated deserialization vulnerability in Xorbits Xoscar up to version 0.11.2. The vulnerability occurs because the SocketChannel.recv() method passes untrusted data directly to cloudpickle.loads() without prior validation of the message type. This enables attackers to craft malicious payloads that trigger the pickle __reduce__ gadget, resulting in remote code execution with the privileges of the server process, commonly root on GPU nodes.
Potential Impact
Successful exploitation allows remote attackers to execute arbitrary code on the affected server with root privileges. This can lead to full system compromise, data theft, or disruption of GPU node operations.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the actor-pool TCP channel to trusted networks and consider implementing network-level controls to prevent untrusted connections.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-06-02T16:30:15.232Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ace95df2cdf04f656aad853
Added to database: 10/13/2026, 20:34:39 UTC
Last enriched: 10/13/2026, 20:49:49 UTC
Last updated: 10/13/2026, 20:50:23 UTC
Views: 6
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