CVE-2026-66800

HIGHNVD 7.58.6▲
EchelonGraph scoreMEDIUM confidence

Score 8.6 from GitHub Security Advisory (severity: HIGH) published 2026-08-21. NVD baseline CVSS 7.5; sources differ by 1.1.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
8.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

Server-side request forgery (ssrf) in Azure Data Factory allows an unauthorized attacker to disclose information over a network.

CVSS v3
7.5
EG Score
8.6(medium)
EG Risk
54(Track)
EG Risk 54/100SSVC: 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
Severity86% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
44%
KEV
Not listed

Published

August 20, 2026

Last Modified

September 16, 2026

Advisory Details (1)

Auto-updated Aug 20, 2026
Patch available. Sources: microsoft.
microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66800

Vendor Advisories for CVE-2026-66800(7)

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

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatrhacm2/cluster-backup-rhel9-operator:17871831762026-08-26redhat
redhatrhacm2/cluster-backup-rhel9-operator:17876846682026-08-26redhat
redhatrhacm2/cluster-backup-rhel9-operator:17871831782026-08-26redhat
redhatrhacm2/cluster-backup-rhel9-operator:17872275762026-08-26redhat
redhatrhacm2/cluster-backup-rhel9-operator:17872590602026-08-26redhat
redhatrhacm2/cluster-backup-rhel9-operator:17872385002026-08-26redhat

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.

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 38× in last 7d / 206× 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 206 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-66800?
CVE-2026-66800 is a high vulnerability published on August 20, 2026. Server-side request forgery (ssrf) in Azure Data Factory allows an unauthorized attacker to disclose information over a network.
When was CVE-2026-66800 disclosed?
CVE-2026-66800 was first published in the National Vulnerability Database on August 20, 2026, with the most recent update on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-66800 actively exploited?
CVE-2026-66800 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 55.7% of all scored CVEs.
What is the CVSS score of CVE-2026-66800?
CVE-2026-66800 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 8.6.
How do I remediate CVE-2026-66800?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-66800, 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

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