Xorbits Xoscar up to 0.11.2 Serialization core.pyx cloudpickle.loads deserialization

Summaryinfo

A vulnerability identified as very critical has been detected in Xorbits Xoscar up to 0.11.2. This affects the function cloudpickle.loads of the file python/xoscar/serialization/core.pyx of the component Serialization. This manipulation causes deserialization. This vulnerability is registered as CVE-2026-49950. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in Xorbits Xoscar up to 0.11.2. It has been declared as very critical. Affected by this vulnerability is the function cloudpickle.loads of the file python/xoscar/serialization/core.pyx of the component Serialization. The manipulation with an unknown input leads to a deserialization vulnerability. The CWE definition for the vulnerability is CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-49950 since 06/02/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/14/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• Xorbits

Name

• Xoscar

Version

• 0.11.0
• 0.11.1
• 0.11.2

CPE 2.3info

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CPE 2.2info

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