CVE-2026-26210

CRITICAL EPSS 48.6%
Published Apr 23, 20262mo ago · Modified Jun 17, 20261w ago
9.3 CVSS 4.0
Critical
Find Similar
Published Apr 23, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
9.3
Exploitability
—
Impact
—
Vector string
CVSS: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
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
48.6% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-502 Deserialization of Untrusted Data Validation

Affected Products 1

VendorProductVersionRange
kvcache-aiktransformers* ≤0.5.3

References 3

  • chocapikk.com https://chocapikk.com/posts/2026/ktransformers-pickle-rce/
    ExploitMitigationThird Party Advisory
  • github.com https://github.com/kvcache-ai/ktransformers/pull/1944
    Issue TrackingPatch
  • vulncheck.com https://www.vulncheck.com/advisories/ktransformers-unsafe-deserialization-rce-via-balance-serve
    Third Party Advisory

Remediation

  • github.com https://github.com/kvcache-ai/ktransformers/pull/1944
    Issue TrackingPatch