CVE-2026-34311

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-28. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.8Exploit: NoneExposed: 0

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

Vulnerability in the Oracle Hospitality OPERA 5 Property Services product of Oracle Hospitality Applications (component: Opera). Supported versions that are affected are 5.6.19.24, 5.6.22, 5.6.25.19, 5.6.27.6 and 5.6.28. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Hospitality OPERA 5 Property Services. Successful attacks of this vulnerability can result in takeover of Oracle Hospitality OPERA 5 Property Services. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
37.1%
KEV
Not listed

Published

May 28, 2026

Last Modified

May 29, 2026

References (1)

Vendor Advisories for CVE-2026-34311(1)

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

Data Freshness Timeline

(refreshed 17× in last 7d / 144× 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 367 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-34311?
CVE-2026-34311 is a critical vulnerability published on May 28, 2026. Vulnerability in the Oracle Hospitality OPERA 5 Property Services product of Oracle Hospitality Applications (component: Opera). Supported versions that are affected are 5.6.19.24, 5.6.22, 5.6.25.19, 5.6.27.6 and 5.6.28. Easily exploitable vulnerability allows unauthenticated attacker with network…
When was CVE-2026-34311 disclosed?
CVE-2026-34311 was first published in the National Vulnerability Database on May 28, 2026, with the most recent update on May 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-34311 actively exploited?
CVE-2026-34311 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 37.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-34311?
CVE-2026-34311 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-34311?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-34311, 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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