CVE-2026-26210

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.

CVSS v4.0

9.3 CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1

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

EPSS

0.70% chance of exploitation in the next 30 days, 51th percentile

Published

2026-04-23

Updated

2026-07-14

Proof-of-concept exploits (1)

• https://chocapikk.com/posts/2026/ktransformers-pickle-rce/

References

• CVE Record
• NVD entry

Related

• CVE-2026-2621
• CVE-2026-26211
• CVE-2026-2620
• CVE-2026-26214
• CVE-2026-26198
• CVE-2026-26215