CVE-2026-49950: critical vulnerability in xorbitsai xoscar
Xorbits Xoscar 0.11.2 Unauthenticated Deserialization RCE via Actor Pool
Published · Updated
48Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 9.3epss 0.6%
exploitation probability
0.6%top 50% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
xorbitsai · xoscarpublic PoCs found — 1
cve_referencewww.vulncheck.com/blog/xorbits-xoscar-unauth-cloudpickle-rceunverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
References
https://github.com/xorbitsai/xoscar/blob/v0.11.2/python/xoscar/backends/communication/socket.py#L99-L104https://github.com/xorbitsai/xoscar/blob/v0.11.2/python/xoscar/serialization/core.pyx#L260https://www.vulncheck.com/advisories/xorbits-xoscar-unauthenticated-deserialization-rce-via-actor-poolhttps://www.vulncheck.com/blog/xorbits-xoscar-unauth-cloudpickle-rce