CVE-2026-26210

critical

Published 2026-04-23 · Modified 2026-05-05

CVSS v3

9.8

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

CVSS v2

—

VIR risk

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.

Predictions

Exploit likelihood

97%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: disclosure@vulncheck.com — https://github.com/kvcache-ai/ktransformers/pull/1944

vendor Authored 2026-05-27

Vendor advisory: disclosure@vulncheck.com — https://chocapikk.com/posts/2026/ktransformers-pickle-rce/

Application impact

Vendor	Product	Versions	Fixed
kvcache-ai	ktransformers	`{"endIncluding":"0.5.3"}`

References

CWEs

CWE-502

Verify integrity in audit chain (admin only). AS-IS.