CVE-2026-26210
KTransformers Unsafe Deserialization RCE via balance_serve
- State
- Published
- Severity
- 9.3 Critical
- Published
- Apr 23, 2026
- Updated
- Jul 14, 2026
- Reserved
- Feb 11, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.3 Critical | 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 | VulnCheck |
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-502 Deserialization of Untrusted Data
Affected Products
| Product | Versions |
|---|---|
ktransformerskvcache-ai |
|
References
- https://chocapikk.com/posts/2026/ktransformers-pickle-rce/technical-descriptionexploit
- https://github.com/kvcache-ai/ktransformers/pull/1944issue-tracking
- https://www.vulncheck.com/advisories/ktransformers-unsafe-deserialization-rce-via-balance-servethird-party-advisory
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