CVE-2026-44393

HIGHPre-NVD 7.47.4—
EchelonGraph scoreMEDIUM confidence

Score 7.4 from GitHub Security Advisory (severity: HIGH) published 2026-06-04. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
7.4
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.4Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

An issue was discovered in OpenStack oslo.messaging 1.0.0 through 17.3.0. The oslo.messaging RabbitMQ driver does not perform TLS hostname verification when connecting to the message broker. When ssl_ca_file is configured, the driver enables certificate chain validation but does not pass the expected broker hostname into the underlying TLS stack. Any certificate signed by the deployment CA is accepted regardless of hostname, allowing an attacker who can intercept control-plane traffic to impersonate the RabbitMQ broker and perform a man-in-the-middle attack on RPC and notification traffic. All OpenStack services using oslo.messaging with RabbitMQ over TLS are affected.

CVSS v3
7.4
EG Score
7.4(medium)
EPSS
5.6%
KEV
Not listed

Published

June 4, 2026

Last Modified

June 30, 2026

Advisory Details (2)

Auto-updated Jun 9, 2026
No patch confirmed yet.
generic

OSSN/OSSN-0096 - OpenStack

https://wiki.openstack.org/wiki/OSSN/OSSN-0096
generic

Bug #2150316 “[OSSN-0096] oslo.messaging does not verify RabbitM...” : Bugs : oslo.messaging

https://bugs.launchpad.net/oslo.messaging/+bug/2150316

Vendor Advisories for CVE-2026-44393(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 104× 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 134 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-44393?
CVE-2026-44393 is a high vulnerability published on June 4, 2026. An issue was discovered in OpenStack oslo.messaging 1.0.0 through 17.3.0. The oslo.messaging RabbitMQ driver does not perform TLS hostname verification when connecting to the message broker. When sslcafile is configured, the driver enables certificate chain validation but does not pass the expected…
When was CVE-2026-44393 disclosed?
CVE-2026-44393 was first published in the National Vulnerability Database on June 4, 2026, with the most recent update on June 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-44393 actively exploited?
CVE-2026-44393 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-44393?
CVE-2026-44393 has a CVSS v3.1 base score of 7.4 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-44393?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-44393, 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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