CVE-2026-49950
Critical
Description
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.
SeverityCritical
CVSS9.8
Exploit probability58. percentile0.9%
ProductXorbitsai Xoscar
PublishedOct 13, 2026
First seenOct 13, 2026
Weakness typeCWE-502Deserialization of untrusted data
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| xorbitsai xoscar | 0.1.0 ≤ v ≤ 0.11.2 | — |
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