CVE-2026-49950 Xorbits Xoscar 0.11.2 Unauthenticated Deserialization RCE via Actor Pool
Remote attackers can execute arbitrary code with root privileges by sending crafted data to the actor pool, affecting Xorbits Xoscar users.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-49950?
CVE-2026-49950 is a critical unsafe deserialization vulnerability in xorbitsai xoscar, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-502
Which versions are affected by CVE-2026-49950?
How do I fix CVE-2026-49950?
No fix has been published for CVE-2026-49950 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-49950 being exploited?
There is no known exploitation of CVE-2026-49950 in the wild and no public exploit code.
Sources
Also known as GHSA-5rfg-55mw-4h28.