CVE-2026-63767

criticalCVSS 9.8covered by 1 sourcefirst seen 2026-07-20

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.

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Exploitation outlook

Moderate exploitation risk1.1% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 64% of all EPSS-scored CVEs.

Advisory coverage (1)

criticalCVE-2026-63767: ktransformers through 0.6.3, fixed in commit def0f93, contains an unauthenticated pickle deser…nvd · 2026-07-20

External references

NVD record for CVE-2026-63767

CVE.org record

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