CVE-2026-67581

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-19. 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: 0.6%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Authentication Bypass by Capture-replay in ZenHive mpp allows an unauthenticated remote client to obtain paid resources by resubmitting one settled on-chain transfer.

MPP.Methods.EVM.verify/2 accepts a transaction-hash credential and matches a transfer purely on token, to and amount (ERC-20) or to and value (native). It binds the proof neither to the challenge being verified nor to any record of prior use, and the generic MPP.Plug dedup store keys on challenge.id, which is regenerated for every 402 response. On a static-price route, a single historical transfer matching the charge therefore satisfies an unbounded number of later charges, including transfers an attacker can read off a public block explorer.

This issue affects mpp: from 0.3.0 before 0.6.3.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100CISA SSVC

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%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.6%
EPSS %ILE
46th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 19, 2026

Last Modified

September 10, 2026

Advisory Details (4)

Auto-updated Aug 19, 2026
Patch available. Sources: github, github_commit.
github_commit

commit ecc038088b1c (ZenHive/mpp)

Fix landed in ZenHive/mpp commit ecc038088b1c — awaiting tagged release

https://github.com/ZenHive/mpp/commit/ecc038088b1cda09ad8a84acc6cc112addb4a68f
generic

OSV - Open Source Vulnerabilities

https://osv.dev/vulnerability/EEF-CVE-2026-67581
generic

CVE-2026-67581

https://cna.erlef.org/cves/CVE-2026-67581.html
github Patch Available

EVM payment method: on-chain transfer proof is not single-use, enabling cross-challenge replay · Advisory · ZenHive/mpp · GitHub

https://github.com/ZenHive/mpp/security/advisories/GHSA-vp5h-xh25-44wf

Vendor Advisories for CVE-2026-67581(1)

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

Affected Packages

(1 across 1 ecosystem)
Hex(1)
PackageVulnerable rangeFix by version rangeDependents
mpp0.3.0 ... 0.6.2 (7 versions)
  • 0.3.0 up to 0.6.3: fixed in 0.6.3
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 24× in last 7d / 100× 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 165 total refreshes for this CVE.

  1. 2026-10-05 10:15 UTCEG score recompute
  2. 2026-10-05 10:15 UTCGHSA enrichment
  3. 2026-10-04 23:22 UTCEPSS rescore
  4. 2026-10-04 21:25 UTCGHSA enrichment
  5. 2026-10-04 05:50 UTCGHSA enrichment
  6. 2026-10-03 17:02 UTCEG score recompute
  7. 2026-10-03 17:01 UTCGHSA enrichment
  8. 2026-10-03 14:26 UTCEPSS rescore
  9. 2026-10-03 04:12 UTCEG score recompute
  10. 2026-10-03 04:12 UTCGHSA enrichment
  11. 2026-10-02 17:56 UTCEPSS rescore
  12. 2026-10-02 14:53 UTCGHSA enrichment
  13. 2026-10-02 01:21 UTCEG score recompute
  14. 2026-10-02 01:21 UTCGHSA enrichment
  15. 2026-10-01 19:50 UTCEPSS rescore
  16. 2026-10-01 10:25 UTCGHSA enrichment
  17. 2026-09-30 21:36 UTCEG score recompute
  18. 2026-09-30 21:36 UTCGHSA enrichment
  19. 2026-09-30 15:03 UTCEPSS rescore
  20. 2026-09-30 08:43 UTCEG score recompute
  21. 2026-09-30 08:43 UTCGHSA enrichment
  22. 2026-09-28 21:42 UTCEG score recompute
  23. 2026-09-28 21:42 UTCGHSA enrichment
  24. 2026-09-28 13:52 UTCEPSS rescore
  25. 2026-09-28 08:49 UTCGHSA enrichment
Show 75 more
  1. 2026-09-27 20:00 UTCEG score recompute
  2. 2026-09-27 20:00 UTCGHSA enrichment
  3. 2026-09-27 13:48 UTCEPSS rescore
  4. 2026-09-27 06:56 UTCEG score recompute
  5. 2026-09-27 06:56 UTCGHSA enrichment
  6. 2026-09-26 15:59 UTCEPSS rescore
  7. 2026-09-25 00:51 UTCEG score recompute
  8. 2026-09-25 00:51 UTCGHSA enrichment
  9. 2026-09-24 10:17 UTCGHSA enrichment
  10. 2026-09-23 21:28 UTCEG score recompute
  11. 2026-09-23 21:28 UTCGHSA enrichment
  12. 2026-09-23 17:54 UTCEPSS rescore
  13. 2026-09-23 08:39 UTCGHSA enrichment
  14. 2026-09-22 19:50 UTCEG score recompute
  15. 2026-09-22 19:50 UTCGHSA enrichment
  16. 2026-09-22 04:22 UTCEG score recompute
  17. 2026-09-22 04:21 UTCGHSA enrichment
  18. 2026-09-21 15:32 UTCGHSA enrichment
  19. 2026-09-21 02:30 UTCEG score recompute
  20. 2026-09-21 02:30 UTCGHSA enrichment
  21. 2026-09-20 20:16 UTCEPSS rescore
  22. 2026-09-20 13:40 UTCGHSA enrichment
  23. 2026-09-20 00:51 UTCEG score recompute
  24. 2026-09-20 00:51 UTCGHSA enrichment
  25. 2026-09-19 11:58 UTCGHSA enrichment
  26. 2026-09-18 23:09 UTCEG score recompute
  27. 2026-09-18 23:09 UTCGHSA enrichment
  28. 2026-09-18 19:28 UTCEPSS rescore
  29. 2026-09-18 10:19 UTCGHSA enrichment
  30. 2026-09-17 21:30 UTCEG score recompute
  31. 2026-09-17 21:30 UTCGHSA enrichment
  32. 2026-09-17 03:53 UTCGHSA enrichment
  33. 2026-09-16 15:04 UTCEG score recompute
  34. 2026-09-16 15:04 UTCGHSA enrichment
  35. 2026-09-16 14:08 UTCEPSS rescore
  36. 2026-09-16 05:15 UTCEPSS rescore
  37. 2026-09-16 02:15 UTCGHSA enrichment
  38. 2026-09-15 13:26 UTCEG score recompute
  39. 2026-09-15 13:26 UTCGHSA enrichment
  40. 2026-09-15 00:37 UTCGHSA enrichment
  41. 2026-09-14 11:46 UTCGHSA enrichment
  42. 2026-09-13 22:57 UTCEG score recompute
  43. 2026-09-13 22:57 UTCGHSA enrichment
  44. 2026-09-13 10:08 UTCGHSA enrichment
  45. 2026-09-12 21:19 UTCEG score recompute
  46. 2026-09-12 21:19 UTCGHSA enrichment
  47. 2026-09-12 08:29 UTCGHSA enrichment
  48. 2026-09-11 19:40 UTCEG score recompute
  49. 2026-09-11 19:40 UTCGHSA enrichment
  50. 2026-09-11 14:53 UTCEPSS rescore
  51. 2026-09-11 09:37 UTCEPSS rescore
  52. 2026-09-11 06:50 UTCEG score recompute
  53. 2026-09-11 06:50 UTCGHSA enrichment
  54. 2026-09-10 18:01 UTCEG score recompute▼ 1.20
  55. 2026-09-10 18:01 UTCGHSA enrichment
  56. 2026-09-10 18:01 UTCNVD updateCVSS v3 → 7.5
  57. 2026-09-10 17:23 UTCEG score recompute
  58. 2026-09-10 17:23 UTCGHSA enrichment
  59. 2026-09-10 04:22 UTCGHSA enrichment
  60. 2026-09-09 15:33 UTCGHSA enrichment
  61. 2026-09-09 02:35 UTCEG score recompute
  62. 2026-09-09 02:35 UTCGHSA enrichment
  63. 2026-09-08 22:01 UTCEPSS rescore
  64. 2026-09-08 07:43 UTCGHSA enrichment
  65. 2026-09-07 18:54 UTCEG score recompute
  66. 2026-09-07 18:54 UTCGHSA enrichment
  67. 2026-09-07 16:01 UTCEPSS rescore
  68. 2026-09-07 06:05 UTCGHSA enrichment
  69. 2026-09-06 17:15 UTCEG score recompute
  70. 2026-09-06 17:15 UTCGHSA enrichment
  71. 2026-09-06 13:47 UTCEPSS rescore
  72. 2026-09-06 04:25 UTCGHSA enrichment
  73. 2026-09-05 15:36 UTCEG score recompute
  74. 2026-09-05 15:36 UTCGHSA enrichment
  75. 2026-09-05 15:31 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-67581?
CVE-2026-67581 is a high vulnerability published on August 19, 2026. Authentication Bypass by Capture-replay in ZenHive mpp allows an unauthenticated remote client to obtain paid resources by resubmitting one settled on-chain transfer. MPP.Methods.EVM.verify/2 accepts a transaction-hash credential and matches a transfer purely on token, to and amount (ERC-20) or to…
When was CVE-2026-67581 disclosed?
CVE-2026-67581 was first published on August 19, 2026, with the most recent update on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-67581 actively exploited?
CVE-2026-67581 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (46th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-67581?
CVE-2026-67581 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-67581?
A fix for CVE-2026-67581 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-67581 are linked in the Vendor Advisories panel on this page.

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