CVE-2026-12383

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-27. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
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%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw was found in the Event-Driven Ansible (EDA) server. The ExternalEventStreamViewSet uses permissive access controls (permission_classes=[AllowAny], authentication_classes=[]) and relies solely on the Subject HTTP header value for mTLS authentication without verifying that the header originated from a trusted proxy. Additionally, the expected certificate Distinguished Name is leaked in the 403 error response body. An attacker who can reach the EDA API endpoint with a spoofed Subject header can inject arbitrary events into mTLS-protected event streams, triggering downstream automation actions.

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%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
5%
KEV
Not listed

Published

July 27, 2026

Last Modified

August 4, 2026

Advisory Details (2)

Auto-updated Jul 27, 2026
Patch available. Sources: redhat.
redhat

2489127 – (CVE-2026-12383) CVE-2026-12383 eda-server: ExternalEventStreamViewSet trusts Subject header without validation and leaks expected DN

https://bugzilla.redhat.com/show_bug.cgi?id=2489127
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-12383

Vendor Advisories for CVE-2026-12383(4)

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

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatautomation-eda-controller-0:1.2.11-1.el9ap2026-08-04redhat
redhatansible-automation-platform-27/eda-controller-rhel9:17853748692026-08-04redhat
redhatautomation-eda-controller-0:1.1.21-1.el9ap2026-08-04redhat

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 32× in last 7d / 132× 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 237 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-12383?
CVE-2026-12383 is a high vulnerability published on July 27, 2026. A flaw was found in the Event-Driven Ansible (EDA) server. The ExternalEventStreamViewSet uses permissive access controls (permissionclasses=[AllowAny], authenticationclasses=[]) and relies solely on the Subject HTTP header value for mTLS authentication without verifying that the header originated…
When was CVE-2026-12383 disclosed?
CVE-2026-12383 was first published in the National Vulnerability Database on July 27, 2026, with the most recent update on August 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-12383 actively exploited?
CVE-2026-12383 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 94.9% of all scored CVEs.
What is the CVSS score of CVE-2026-12383?
CVE-2026-12383 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-12383?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12383, 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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