# CVE-2026-26210

> Vulnerability · severity: **CRITICAL** (CVSS 9.8).

## 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.

## Key facts

- **CVE ID:** CVE-2026-26210
- **Published:** 2026-04-23
- **CVSS severity:** CRITICAL
- **CVSS base score:** 9.8
- **CWE codes:** CWE-502

## Affected products

- `kvcache-ai:ktransformers`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-26210

## Citation

> AI Analytics. CVE-2026-26210. Retrieved 2026-07-22 from https://api.ai-analytics.org/cve/CVE-2026-26210. Derived from NIST NVD. Licensed CC0.

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