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TI-2026-73470 Aliases CVE-2026-49950GHSA-5rfg-55mw-4h28

Unauthenticated deserialization RCE in Xorbits Xoscar actor pool

Priority MEDIUM 44CWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-502.

Summary

Xorbits Xoscar through 0.11.2 deserializes data received over its actor-pool TCP channel before validating the message type. The flaw is CWE-502, deserialization of untrusted data, where cloudpickle.loads() processes unvalidated input. An unauthenticated remote attacker can send crafted data to execute arbitrary code as the server process, which commonly runs as root on GPU nodes.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0085 58th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
xorbitsaixoscar0.1.0 – 0.11.2—No fix listedCNA
  • xoscar Vendorxorbitsai Affected 0.1.0 – 0.11.2 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for Xorbits Xoscar.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

  1. 2026-10-13 Threatist record created from CVE-2026-49950
  2. 2026-10-13 Alias added: GHSA-5rfg-55mw-4h28
  3. 2026-10-15 CISA SSVC decision points changed
  4. 2026-10-25 EPSS moved to the 50th–90th percentile

References

Other 2

  • TI-2026-58780 Xinference 3.3.0 Unauthenticated Arbitrary-Path File Read via /v1/models/llm/auto-register CVSS 4.0HIGH 8.7
  • TI-2026-44100 Xinference: Remote code execution via unsafe `eval()` in Llama3 tool-call parsing CVSS 3.1CRITICAL 10.0
  • TI-2026-53677 Xinference through 2.11.0 Remote Code Execution via Hardcoded trust_remote_code in Model Loaders CVSS 4.0HIGH 8.7
  • TI-2026-76179 Path traversal in Xinference lets attackers write and delete JSON files CVSS 4.0HIGH 8.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences