CVE-2026-67589

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-05. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 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: 0.8%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A pre-authentication attacker could leverage type size/count handling to cause excessive allocation leading to potential denial of service.

This issue affects Apache Qpid ProtonJ2: through 1.1.0.

Users are recommended to upgrade to version 1.2.0, which fixes the issue.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
39
EG Risk 39/100CISA 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%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or 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
0.8%
EPSS %ILE
54th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or 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 (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). 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 5, 2026

Last Modified

August 7, 2026

Advisory Details (2)

Auto-updated Aug 6, 2026
Patch available.
generic

oss-security - CVE-2026-67589: Apache Qpid ProtonJ2: Type size/count handling can lead to excessive allocation pre-authentication

http://www.openwall.com/lists/oss-security/2026/08/04/28
generic
https://lists.apache.org/thread/bs24x4778dh72xtfs299cy8krvdlo47q

Vendor Advisories for CVE-2026-67589(2)

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 / EcosystemFix (by version range) / PatchReleasedSource
redhatprotonj22026-09-21redhat

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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 26× 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 218 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-67589?
CVE-2026-67589 is a high vulnerability published on August 5, 2026. A pre-authentication attacker could leverage type size/count handling to cause excessive allocation leading to potential denial of service. This issue affects Apache Qpid ProtonJ2: through 1.1.0. Users are recommended to upgrade to version 1.2.0, which fixes the issue.
When was CVE-2026-67589 disclosed?
CVE-2026-67589 was first published on August 5, 2026, with the most recent update on August 7, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-67589 actively exploited?
CVE-2026-67589 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.8% probability of exploitation in the next 30 days (54th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-67589?
CVE-2026-67589 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-67589?
A fix for CVE-2026-67589 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-67589 are linked in the Vendor Advisories panel on this page.

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