CVE-2026-63767

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-20. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
9.8
EG Score
9.8(high)
EG Risk
59(Track)
EG Risk 59/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
51%
KEV
Not listed

Published

July 20, 2026

Last Modified

July 23, 2026

Advisory Details (4)

Auto-updated Jul 25, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit, github_pr.
generic

ktransformers Unauthenticated Pickle Deserialization RCE via ZMQ | Advisories | VulnCheck

https://www.vulncheck.com/advisories/ktransformers-unauthenticated-pickle-deserialization-rce-via-zmq
github_pr

fix(security): bind balance_serve scheduler ZMQ socket to loopback (#2087)

Fix merged in kvcache-ai/ktransformers PR #2091 on 2026-07-19 — awaiting tagged release

https://github.com/kvcache-ai/ktransformers/pull/2091
generic

Unauthenticated pickle deserialization RCE on the balance_serve scheduler ZMQ socket (bound on all interfaces) · Issue #2087 · kvcache-ai/ktransformers · GitHub

https://github.com/kvcache-ai/ktransformers/issues/2087
github_commit

commit def0f9313d6e (kvcache-ai/ktransformers)

Fix landed in kvcache-ai/ktransformers commit def0f9313d6e — awaiting tagged release

https://github.com/kvcache-ai/ktransformers/commit/def0f9313d6e063b5c5ccdfa1f6707f7a40dfdca

Vendor Advisories for CVE-2026-63767(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 30× in last 7d / 30× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-27 14:14 UTCEPSS rescore
  2. 2026-07-27 10:43 UTCGHSA enrichment
  3. 2026-07-27 06:45 UTCGHSA enrichment
  4. 2026-07-27 02:44 UTCGHSA enrichment
  5. 2026-07-26 22:45 UTCGHSA enrichment
  6. 2026-07-26 18:46 UTCEG score recompute
  7. 2026-07-26 18:46 UTCGHSA enrichment
  8. 2026-07-26 14:54 UTCEPSS rescore
  9. 2026-07-26 14:54 UTCEPSS rescore
  10. 2026-07-26 14:46 UTCGHSA enrichment
  11. 2026-07-26 10:46 UTCEG score recompute
  12. 2026-07-26 10:46 UTCGHSA enrichment
  13. 2026-07-26 04:26 UTCEG score recompute
  14. 2026-07-26 04:26 UTCGHSA enrichment
  15. 2026-07-25 14:18 UTCEPSS rescore
  16. 2026-07-25 14:18 UTCEPSS rescore
  17. 2026-07-24 14:18 UTCEPSS rescore
  18. 2026-07-24 14:18 UTCEPSS rescore
  19. 2026-07-23 14:18 UTCEPSS rescore
  20. 2026-07-23 14:18 UTCEPSS rescore
  21. 2026-07-23 03:22 UTCEG score recompute
  22. 2026-07-22 23:30 UTCEG score recompute
  23. 2026-07-22 23:30 UTCGHSA enrichment
  24. 2026-07-22 14:08 UTCEPSS rescore
  25. 2026-07-22 14:08 UTCEPSS rescore
Show 5 more
  1. 2026-07-21 15:25 UTCEPSS rescore
  2. 2026-07-21 15:25 UTCEPSS rescore
  3. 2026-07-20 20:42 UTCEG score recompute
  4. 2026-07-20 19:57 UTCEG score recompute
  5. 2026-07-20 19:57 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-63767?
CVE-2026-63767 is a critical vulnerability published on July 20, 2026. 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…
When was CVE-2026-63767 disclosed?
CVE-2026-63767 was first published in the National Vulnerability Database on July 20, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-63767 actively exploited?
CVE-2026-63767 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 49.1% of all scored CVEs.
What is the CVSS score of CVE-2026-63767?
CVE-2026-63767 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-63767?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-63767, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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