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.

Referanslar

• 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