CVE-2026-42222

HIGHNVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-05-06. NVD baseline CVSS 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.1Exploit: Elevated riskExposed: 0

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

Nginx UI is a web user interface for the Nginx web server. In version 2.3.5, an unauthenticated bootstrap takeover exists in nginx-ui during the initial installation window exposed by POST /api/install. At time of publication no public patches are available.

CVSS v3
8.1
EG Score
8.1(medium)
EG Risk
52(Track*)
EG Risk 52/100SSVC: 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
Severity81% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
27%
KEV
Not listed

Published

May 4, 2026

Last Modified

May 6, 2026

Advisory Details (1)

Auto-updated May 4, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Unauthenticated first-boot instance claim via POST /api/install allows remote bootstrap takeover · Advisory · 0xJacky/nginx-ui · GitHub

https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-mxqh-q9h6-v8pq

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
gogithub.com/0xJacky/nginx-ui—ghsa

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.

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/0xJacky/nginx-ui2.3.5——

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 29× 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 193 total refreshes for this CVE.

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

Related CVEs(same product + same CWE)

Same product

1 shown

go:github.com/0xJacky/nginx-ui

Frequently asked(5)

What is CVE-2026-42222?
CVE-2026-42222 is a high vulnerability published on May 4, 2026. Nginx UI is a web user interface for the Nginx web server. In version 2.3.5, an unauthenticated bootstrap takeover exists in nginx-ui during the initial installation window exposed by POST /api/install. At time of publication no public patches are available.
When was CVE-2026-42222 disclosed?
CVE-2026-42222 was first published in the National Vulnerability Database on May 4, 2026, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42222 actively exploited?
CVE-2026-42222 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 72.9% of all scored CVEs.
What is the CVSS score of CVE-2026-42222?
CVE-2026-42222 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-42222?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42222, 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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