CVE-2026-63767

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM 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 — 3 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(medium)
EG Risk
60(Track)
EG Risk 60/100SSVC: 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
64%
KEV
Not listed

Published

July 20, 2026

Last Modified

July 23, 2026

Advisory Details (4)

Auto-updated Sep 5, 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 24× in last 7d / 153× 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.

Showing the most recent 100 of 314 total refreshes for this CVE.

  1. 2026-09-11 18:31 UTCEG score recompute
  2. 2026-09-11 18:31 UTCGHSA enrichment
  3. 2026-09-11 14:53 UTCEPSS rescore
  4. 2026-09-11 09:37 UTCEPSS rescore
  5. 2026-09-11 09:20 UTCEG score recompute
  6. 2026-09-11 09:20 UTCGHSA enrichment
  7. 2026-09-09 11:50 UTCEG score recompute
  8. 2026-09-09 11:50 UTCGHSA enrichment
  9. 2026-09-08 22:01 UTCEPSS rescore
  10. 2026-09-08 02:48 UTCGHSA enrichment
  11. 2026-09-07 22:49 UTCEG score recompute
  12. 2026-09-07 22:49 UTCGHSA enrichment
  13. 2026-09-07 16:01 UTCEPSS rescore
  14. 2026-09-06 15:51 UTCEG score recompute
  15. 2026-09-06 15:51 UTCGHSA enrichment
  16. 2026-09-06 13:47 UTCEPSS rescore
  17. 2026-09-06 11:30 UTCGHSA enrichment
  18. 2026-09-06 04:12 UTCGHSA enrichment
  19. 2026-09-05 23:50 UTCGHSA enrichment
  20. 2026-09-05 19:52 UTCEG score recompute
  21. 2026-09-05 19:52 UTCGHSA enrichment
  22. 2026-09-05 15:31 UTCEPSS rescore
  23. 2026-09-05 09:23 UTCEG score recompute
  24. 2026-09-05 09:23 UTCGHSA enrichment
  25. 2026-09-04 05:07 UTCEPSS rescore
Show 75 more
  1. 2026-09-02 14:12 UTCEPSS rescore
  2. 2026-09-02 01:02 UTCEG score recompute
  3. 2026-09-02 01:02 UTCGHSA enrichment
  4. 2026-09-01 13:54 UTCEPSS rescore
  5. 2026-09-01 04:40 UTCEPSS rescore
  6. 2026-08-31 03:26 UTCGHSA enrichment
  7. 2026-08-30 23:26 UTCGHSA enrichment
  8. 2026-08-30 19:27 UTCEG score recompute
  9. 2026-08-30 19:27 UTCGHSA enrichment
  10. 2026-08-30 19:17 UTCEPSS rescore
  11. 2026-08-30 15:29 UTCGHSA enrichment
  12. 2026-08-30 10:56 UTCGHSA enrichment
  13. 2026-08-30 06:29 UTCGHSA enrichment
  14. 2026-08-30 02:31 UTCEG score recompute
  15. 2026-08-30 02:31 UTCGHSA enrichment
  16. 2026-08-30 01:22 UTCEPSS rescore
  17. 2026-08-28 21:42 UTCEPSS rescore
  18. 2026-08-28 01:40 UTCGHSA enrichment
  19. 2026-08-27 21:19 UTCEG score recompute
  20. 2026-08-27 21:19 UTCGHSA enrichment
  21. 2026-08-27 14:25 UTCEPSS rescore
  22. 2026-08-27 11:35 UTCGHSA enrichment
  23. 2026-08-27 01:41 UTCGHSA enrichment
  24. 2026-08-26 21:42 UTCEG score recompute
  25. 2026-08-26 21:42 UTCGHSA enrichment
  26. 2026-08-26 14:46 UTCEPSS rescore
  27. 2026-08-26 12:47 UTCGHSA enrichment
  28. 2026-08-26 08:47 UTCGHSA enrichment
  29. 2026-08-26 04:47 UTCGHSA enrichment
  30. 2026-08-26 00:48 UTCGHSA enrichment
  31. 2026-08-25 20:13 UTCGHSA enrichment
  32. 2026-08-25 15:47 UTCEG score recompute
  33. 2026-08-25 15:47 UTCGHSA enrichment
  34. 2026-08-25 13:49 UTCEPSS rescore
  35. 2026-08-25 11:49 UTCGHSA enrichment
  36. 2026-08-25 07:47 UTCGHSA enrichment
  37. 2026-08-25 03:47 UTCGHSA enrichment
  38. 2026-08-24 23:49 UTCGHSA enrichment
  39. 2026-08-24 19:50 UTCGHSA enrichment
  40. 2026-08-24 15:52 UTCEG score recompute
  41. 2026-08-24 15:52 UTCGHSA enrichment
  42. 2026-08-24 11:42 UTCEG score recompute
  43. 2026-08-24 11:42 UTCGHSA enrichment
  44. 2026-08-24 07:43 UTCGHSA enrichment
  45. 2026-08-24 03:42 UTCGHSA enrichment
  46. 2026-08-23 22:26 UTCGHSA enrichment
  47. 2026-08-23 18:28 UTCGHSA enrichment
  48. 2026-08-23 14:29 UTCGHSA enrichment
  49. 2026-08-23 10:30 UTCGHSA enrichment
  50. 2026-08-23 06:32 UTCGHSA enrichment
  51. 2026-08-23 02:33 UTCEG score recompute
  52. 2026-08-23 02:33 UTCGHSA enrichment
  53. 2026-08-23 00:19 UTCEPSS rescore
  54. 2026-08-22 22:31 UTCGHSA enrichment
  55. 2026-08-22 18:32 UTCGHSA enrichment
  56. 2026-08-22 14:33 UTCGHSA enrichment
  57. 2026-08-22 10:33 UTCGHSA enrichment
  58. 2026-08-22 06:34 UTCGHSA enrichment
  59. 2026-08-22 02:35 UTCEG score recompute
  60. 2026-08-22 02:35 UTCGHSA enrichment
  61. 2026-08-21 23:49 UTCEPSS rescore
  62. 2026-08-21 22:37 UTCGHSA enrichment
  63. 2026-08-21 18:38 UTCGHSA enrichment
  64. 2026-08-21 14:39 UTCGHSA enrichment
  65. 2026-08-21 10:40 UTCGHSA enrichment
  66. 2026-08-21 06:41 UTCGHSA enrichment
  67. 2026-08-21 02:42 UTCEG score recompute
  68. 2026-08-21 02:42 UTCGHSA enrichment
  69. 2026-08-20 22:55 UTCEPSS rescore
  70. 2026-08-20 22:43 UTCGHSA enrichment
  71. 2026-08-20 18:45 UTCGHSA enrichment
  72. 2026-08-20 14:46 UTCGHSA enrichment
  73. 2026-08-20 10:47 UTCGHSA enrichment
  74. 2026-08-20 06:49 UTCGHSA enrichment
  75. 2026-08-20 02:50 UTCGHSA enrichment

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 35.8% 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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