CVE-2026-49950
CVE-2026-49950 · Xorbits Xoscar 0.11.2 Unauthenticated Deserialization RCE via Actor Pool
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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 9.3 · Critical · EPSS 0.6%
- Published
- Updated
Affected products and versions
xoscar
- Versions
- ≥ 0.1.0, ≤ 0.11.2: Affected (semver)
No fix published
Original sources
- https://github.com/xorbitsai/xoscar/blob/v0.11.2/python/xoscar/serialization/core.pyx#L260
- https://github.com/xorbitsai/xoscar/blob/v0.11.2/python/xoscar/backends/communication/socket.py#L99-L104
- https://www.vulncheck.com/advisories/xorbits-xoscar-unauthenticated-deserialization-rce-via-actor-pool
- https://www.vulncheck.com/blog/xorbits-xoscar-unauth-cloudpickle-rce
- https://nvd.nist.gov/vuln/detail/CVE-2026-49950