Critical severity · published Apr 23, 2026
CVE-2026-26210
KTransformers Unsafe Deserialization RCE via balance_serve
9.8
CVSS
0.7%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 53% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KT
ktransformers · kvcache-ai
through 0.5.3 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-26210
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-26210
Exploit
https://chocapikk.com/posts/2026/ktransformers-pickle-rce/
Issue Tracking
https://github.com/kvcache-ai/ktransformers/pull/1944
Third Party Advisory
https://www.vulncheck.com/advisories/ktransformers-unsafe-deserialization-rce-via-balance-serve
More from ktransformers
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CVE-2026-63767
ktransformers Unauthenticated Pickle Deserialization RCE via ZMQ