Critical 9.8Published Jul 20, 2026

CVE-2026-63767ktransformers Unauthenticated Pickle Deserialization RCE via ZMQ

Updated under an hour ago (Oct 28, 2026, 1:50 AM ET)

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Every CVE for kvcache-ai ktransformers

Exploited in the last 30 days

ktransformers through 0.6.3, fixed in commit def0f93, contains an unauthenticated pickle deserialization vulnerability that allows remote attackers to execute arbitrary commands by sending crafted pickle payloads to the SchedulerServer ZMQ ROUTER socket bound to all interfaces. Attackers can exploit malicious __reduce__ methods embedded in crafted pickle payloads to execute arbitrary shell commands as the server process.

CVSS: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-502
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Jul 21, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

kvcache-ai ktransformers kvcache_ai:ktransformers (from the name)	through 0.6.3; def0f9313d6e063b5c5ccdfa1f6707f7a40dfdca not affected	CNA record

References

References

https://github.com/kvcache-ai/ktransformers/issues/2087	technical-description, exploit, issue-tracking
https://github.com/kvcache-ai/ktransformers/pull/2091	issue-tracking, patch
https://github.com/kvcache-ai/ktransformers/commit/def0f9313d6e063b5c5ccdfa1f6707f7a40dfdca	patch
https://www.vulncheck.com/advisories/ktransformers-unauthenticated-pickle-deserialization-rce-via-zmq	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.