CVE-2026-49950

Xorbits Xoscar through 0.11.2 contains an unauthenticated deserialization vulnerability that allows remote attackers to execute arbitrary code by sending crafted data over the actor-pool TCP channel. Attackers can exploit SocketChannel.recv() passing unvalidated data to cloudpickle.loads(), which triggers pickle __reduce__ gadget execution before message type validation, achieving remote code execution as the server process which commonly runs as root on GPU nodes.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/xorbitsai/xoscar/blob/v0.11.2/python/xoscar/backends/communication/socket.py#L99-L104
https://github.com/xorbitsai/xoscar/blob/v0.11.2/python/xoscar/serialization/core.pyx#L260
https://www.vulncheck.com/advisories/xorbits-xoscar-unauthenticated-deserialization-rce-via-actor-pool
https://www.vulncheck.com/blog/xorbits-xoscar-unauth-cloudpickle-rce

Configurations

No configuration.

History

16 Oct 2026, 15:17

Type	Values Removed	Values Added
References		() https://www.vulncheck.com/blog/xorbits-xoscar-unauth-cloudpickle-rce -

13 Oct 2026, 21:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-13 21:17

Updated : 2026-10-16 18:25

NVD link : CVE-2026-49950

Mitre link : CVE-2026-49950

CVE.ORG link : CVE-2026-49950

JSON object : View

Products Affected

No product.

CWE

CWE-502

Deserialization of Untrusted Data

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