Summary
| Parameter | Value |
|---|---|
| CVE ID | CVE-2026-26210 |
| Alert Source | GitHub Advisory - Critical Vulnerability |
| CVE Publication Year | 2026 |
| Date Published | 2026-04-24 |
| Vendor | KTransformers |
| Product | KTransformers |
| CVSS Score | 9.8 (critical) |
| EPSS Score | No data |
| CISA KEV | No |
| Ransomware | Not confirmed |
Vulnerability Description
KTransformers through 0.5.3 contains an unsafe deserialization vulnerability in the balance_serve backend mode where the scheduler RPC server binds a ZMQ ROUTER socket to all interfaces with no authentication and deserializes incoming messages using pickle.loads() without validation. Attackers can send a crafted pickle payload to the exposed ZMQ socket to execute arbitrary code on the server with the privileges of the ktransformers process.
Required Actions
Update KTransformers to the patched version immediately. Until the patch is applied, do not expose balance_serve on public interfaces — bind the ZMQ socket to localhost only or to an isolated network segment, block the scheduler RPC ports at the firewall, and review logs for unusual connections to the ZMQ socket.
Who Is Affected?
This vulnerability affects KTransformers at versions through 0.5.3. Check whether your organization runs KTransformers for LLM inference in balance_serve mode and update the installation without delay.
Sources
Need help securing your systems? nFlo team offers vulnerability management and 24/7 SOC services. Contact us.
