CVE-2026-40093

CRITICALNVD 8.19.1▲
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-04-10. NVD baseline CVSS 8.1; sources differ by 1.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.1Exploit: None knownExposed: 0

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

nimiq-blockchain provides persistent block storage for Nimiq's Rust implementation. In 1.3.0 and earlier, block timestamp validation enforces that timestamp >= parent.timestamp for non-skip blocks and timestamp == parent.timestamp + MIN_PRODUCER_TIMEOUT for skip blocks, but there is no visible upper bound check against the wall clock. A malicious block-producing validator can set block timestamps arbitrarily far in the future. This directly affects reward calculations via Policy::supply_at() and batch_delay() in blockchain/src/reward.rs, inflating the monetary supply beyond the intended emission schedule.

CVSS v3
8.1
EG Score
9.1(medium)
EG Risk
41(Track)
EG Risk 41/100SSVC: 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
Severity91% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
24%
KEV
Not listed

Published

April 9, 2026

Last Modified

April 24, 2026

References (1)

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
rustnimiq-blockchain—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
crates.io(1)
PackageVulnerable rangeFixed inDependents
nimiq-blockchain———

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 28× 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 214 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-40093?
CVE-2026-40093 is a critical vulnerability published on April 9, 2026. nimiq-blockchain provides persistent block storage for Nimiq's Rust implementation. In 1.3.0 and earlier, block timestamp validation enforces that timestamp >= parent.timestamp for non-skip blocks and timestamp == parent.timestamp + MINPRODUCERTIMEOUT for skip blocks, but there is no visible upper…
When was CVE-2026-40093 disclosed?
CVE-2026-40093 was first published in the National Vulnerability Database on April 9, 2026, with the most recent update on April 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-40093 actively exploited?
CVE-2026-40093 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 75.9% of all scored CVEs.
What is the CVSS score of CVE-2026-40093?
CVE-2026-40093 has a CVSS v3 base score of 8.1 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.1.
How do I remediate CVE-2026-40093?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-40093, 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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