CVE-2026-26210

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-04-24. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Elevated
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: Elevated riskExposed: 0

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

KTransformers through 0.5.3 contains an unsafe deserialization vulnerability in the balance_serve backend mode where the scheduler RPC server binds a ZMQ ROUTER socket to all interfaces with no authentication and deserializes incoming messages using pickle.loads() without validation. Attackers can send a crafted pickle payload to the exposed ZMQ socket to execute arbitrary code on the server with the privileges of the ktransformers process.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
75(Attend)
EG Risk 75/100SSVC: Attend

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%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
52%
KEV
Not listed

Published

April 23, 2026

Last Modified

July 14, 2026

Advisory Details (3)

Auto-updated Sep 19, 2026
🔬 Proof of concept available. No patch confirmed yet. Sources: github_pr.
generic

KTransformers Unsafe Deserialization RCE via balance_serve | Advisories | VulnCheck

https://www.vulncheck.com/advisories/ktransformers-unsafe-deserialization-rce-via-balance-serve
github_pr

Fix unsafe pickle deserialization in gRPC PolicyServer (CVE-2026-26210)

Upstream fix in progress (PR #1944 · kvcache-ai/ktransformers, state=closed)

https://github.com/kvcache-ai/ktransformers/pull/1944
generic🟡 PoC Available

CVE-2026-26210: ktransformers Unauthenticated RCE via Pickle Deserialization in ZMQ Scheduler - Chocapikk's Cybersecurity Blog

https://chocapikk.com/posts/2026/ktransformers-pickle-rce/

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 27× 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 308 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-26210?
CVE-2026-26210 is a critical vulnerability published on April 23, 2026. KTransformers through 0.5.3 contains an unsafe deserialization vulnerability in the balance_serve backend mode where the scheduler RPC server binds a ZMQ ROUTER socket to all interfaces with no authentication and deserializes incoming messages using pickle.loads() without validation. Attackers can…
When was CVE-2026-26210 disclosed?
CVE-2026-26210 was first published in the National Vulnerability Database on April 23, 2026, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-26210 actively exploited?
CVE-2026-26210 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 48.2% of all scored CVEs.
What is the CVSS score of CVE-2026-26210?
CVE-2026-26210 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-26210?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-26210, 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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