CVE-2026-78234

CRITICALPre-NVD 9.99.9—
EchelonGraph scoreHIGH confidence

Score 9.9 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-08. a secondary CVSS source baseline 9.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
9.9EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.9Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw was found in hawtio-operator. The operator reads the OpenShift Service CA private signing key from the openshift-service-ca namespace and uses it to mint client certificates with a Subject Common Name (CN) supplied by the author of a namespaced Hawtio custom resource. Because the operator ships a ClusterRole that aggregates Hawtio CR permissions into the edit and admin roles, any user with edit access in any namespace can obtain a Service-CA-signed certificate with an arbitrary subject. This certificate can be used to impersonate any in-cluster service identity to peers that trust the Service CA for client authentication, including Jolokia agents and other Service-CA-trusting components.

CVSS v3
9.9
EG Score
9.9(high)
EG Risk
45(Track)
EG Risk 45/100SSVC: 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
Severity99% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
12%
KEV
Not listed

Published

September 8, 2026

Last Modified

September 8, 2026

Advisory Details (2)

Auto-updated Sep 15, 2026
Patch available. Sources: redhat.
redhat

2524894 – (CVE-2026-78234) CVE-2026-78234 hawtio-operator: hawtio-operator: Service-CA signing oracle allows arbitrary-CN certificate issuance to namespace edit users

https://bugzilla.redhat.com/show_bug.cgi?id=2524894
redhat Patch Available

CVE-2026-78234 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-78234

Vendor Advisories for CVE-2026-78234(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
redhatrhbac-4/hawtio-rhel9-operator:2.0.1-102026-09-09redhat

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.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 86× in last 7d / 147× 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 147 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Same vendor

1 shown

redhat:RHSA-2026:66120

Frequently asked(5)

What is CVE-2026-78234?
CVE-2026-78234 is a critical vulnerability published on September 8, 2026. A flaw was found in hawtio-operator. The operator reads the OpenShift Service CA private signing key from the openshift-service-ca namespace and uses it to mint client certificates with a Subject Common Name (CN) supplied by the author of a namespaced Hawtio custom resource. Because the operator…
When was CVE-2026-78234 disclosed?
CVE-2026-78234 was first published in the National Vulnerability Database on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-78234 actively exploited?
CVE-2026-78234 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 88.2% of all scored CVEs.
What is the CVSS score of CVE-2026-78234?
CVE-2026-78234 has a CVSS v3 base score of 9.9 (NVD).
How do I remediate CVE-2026-78234?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-78234, 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

Explore the affected products and dependency analysis for CVE-2026-78234

Explore →

Is Your Infrastructure Affected by CVE-2026-78234?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs