CVE-2026-26210

CRITICAL

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.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published4/23/2026

Last Modified4/24/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-502

References

https://chocapikk.com/posts/2026/ktransformers-pickle-rce/(disclosure@vulncheck.com)

https://github.com/kvcache-ai/ktransformers/pull/1944(disclosure@vulncheck.com)

https://www.vulncheck.com/advisories/ktransformers-unsafe-deserialization-rce-via-balance-serve(disclosure@vulncheck.com)

IOC Correlations

No correlations recorded

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