CVE-2026-63767 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-63767CRITICAL

kvcache-ai ktransformers — ktransformers Unauthenticated Pickle Deserialization RCE via ZMQ

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   N   N   H   H   H    9.3   .0074   51.9     —

AFFECTED
  Product        Versions     Fixed
  ktransformers  unspecified  def0f9313d6e063b5c5ccdfa1f6707f7a40dfdca

TIMELINE
  Jul 18  Reserved by VulnCheck
  Jul 20  Published (CNA: VulnCheck)
  Jul 21  EXPLOIT PUBLISHED — CVE-2026-63767 (kvcache-ai ktransformers). Public exploit reference added.

CWE-502 · CNA: VulnCheck · CVSS v4.0 · 4 references · NVD status: Deferred

Description

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
July 18, 2026	Reserved	Reserved by VulnCheck
July 20, 2026	Published	Published (CNA: VulnCheck)
July 21, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-63767 (kvcache-ai ktransformers). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
kvcache-ai	ktransformers	—	—	def0f9313d6e063b5c5ccdfa1f6707f7a40dfdca

Weaknesses

CWE-502

References (4)

Authoritative record: CVE-2026-63767 at cve.org

Vendors: kvcache-ai

Weaknesses: CWE-502

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-63767 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.