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 33× in last 7d / 128× 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 253 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

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 94.8% 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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