CVE-2026-40092

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-05-15. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: 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 versions 1.3.0 and below, a malicious network peer can crash any Nimiq full node by publishing a crafted Kademlia DHT record. The maliciously crafted record would contain a TaggedSigned with a signature field whose byte length is not exactly 64 in order to cause a crash. When the victim node's DHT verifier calls TaggedSigned::verify, execution reaches Ed25519Signature::from_bytes(sig).unwrap() in the TaggedPublicKey implementation for Ed25519PublicKey. The from_bytes call fails because ed25519_zebra::Signature::try_from rejects slices not 64 bytes, and the unwrap() panics. The BLS TaggedPublicKey implementation correctly returns false on error; only the Ed25519 implementation panics. This issue has been fixed in version 1.4.0.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
47%
KEV
Not listed

Published

May 20, 2026

Last Modified

July 23, 2026

Advisory Details (4)

Auto-updated Jun 7, 2026
Patch available. Sources: github_commit, github_pr, github_release, github.
github Patch Available

Unchecked Ed25519 signature length in TaggedPublicKey::verify causes remote node panic via DHT · Advisory · nimiq/core-rs-albatross · GitHub

https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-27w2-87xv-37c6
github_release Patch Available

Mainnet 1.4.0

Patch available: nimiq/core-rs-albatross v1.4.0

https://github.com/nimiq/core-rs-albatross/releases/tag/v1.4.0
github_pr Patch Available

Fix TaggedPublicKey::verify panic on invalid signature length

Patch available: nimiq/core-rs-albatross v1.4.0 (PR #3708 merged 2026-04-22)

https://github.com/nimiq/core-rs-albatross/pull/3708
github_commit Patch Available

commit 807ee8e99a7c (nimiq/core-rs-albatross)

Patch available: nimiq/core-rs-albatross v1.4.0 (contains commit 807ee8e99a7c)

https://github.com/nimiq/core-rs-albatross/commit/807ee8e99a7ccdc604d49971f292854bfa36754d

Vendor Advisories for CVE-2026-40092(1)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
rustnimiq-keys—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-keys———

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 76× 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 219 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-40092?
CVE-2026-40092 is a high vulnerability published on May 20, 2026. nimiq-blockchain provides persistent block storage for Nimiq's Rust implementation. In versions 1.3.0 and below, a malicious network peer can crash any Nimiq full node by publishing a crafted Kademlia DHT record. The maliciously crafted record would contain a TaggedSigned<ValidatorRecord, KeyPair>…
When was CVE-2026-40092 disclosed?
CVE-2026-40092 was first published in the National Vulnerability Database on May 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-2026-40092 actively exploited?
CVE-2026-40092 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 52.7% of all scored CVEs.
What is the CVSS score of CVE-2026-40092?
CVE-2026-40092 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-40092?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-40092, 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.

Dependency Blast Radius

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