CVE-2026-47428

CRITICALPre-NVD 9.69.6—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.6 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6%, top 53% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 4 sources updated this weekElevated
9.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.6Exploit: Elevated riskExposed: 0

A fix is available — apply it.

Vitest is a testing framework powered by Vite. From 4.0.17 until 4.1.6 and 5.0.0-beta.3, Vitest Browser Mode served /__vitest_test__/ with the otelCarrier query parameter inserted directly into an inline module script, allowing a crafted browser-runner URL to execute arbitrary JavaScript in the Vitest server origin and recover VITEST_API_TOKEN for authenticated API calls. This issue is fixed in versions 4.1.6 and 5.0.0-beta.3.

CVSS v3
9.6
EG Score
9.6(medium)
EG Risk
59(Track*)
EG Risk 59/100SSVC: 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
Severity96% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
1%
EPSS %ILE
48%
KEV
Not listed

Published

June 1, 2026

Last Modified

July 15, 2026

Advisory Details (7)

Auto-updated Sep 14, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github_pr, github_release, github.
github Patch Available🟡 PoC Available

Vitest browser mode serves unsanitized otelCarrier query parameter as inline script · Advisory · vitest-dev/vitest · GitHub

https://github.com/vitest-dev/vitest/security/advisories/GHSA-2h32-95rg-cppp
github_release Patch Available

v5.0.0-beta.3

Patch available: vitest-dev/vitest v5.0.0-beta.3 (pre-release)

https://github.com/vitest-dev/vitest/releases/tag/v5.0.0-beta.3
github_release Patch Available

v4.1.6

Patch available: vitest-dev/vitest v4.1.6

https://github.com/vitest-dev/vitest/releases/tag/v4.1.6
github_pr Patch Available

fix(browser): simplify orchestrator otel carrier

Patch available: vitest-dev/vitest v4.1.6 (PR #10285 merged 2026-05-07)

https://github.com/vitest-dev/vitest/pull/10285
github_pr Patch Available

fix(browser): simplify orchestrator otel carrier

Patch available: vitest-dev/vitest v5.0.0-beta.3 (PR #10283 merged 2026-05-07)

https://github.com/vitest-dev/vitest/pull/10283
github_commit Patch Available

commit 3514f9fa135c (vitest-dev/vitest)

Patch available: vitest-dev/vitest v5.0.0-beta.3 (contains commit 3514f9fa135c)

https://github.com/vitest-dev/vitest/commit/3514f9fa135c90e1c35754fc4d27c9cf351faafa
github_commit Patch Available

commit 18af98cee183 (vitest-dev/vitest)

Patch available: vitest-dev/vitest v4.1.6 (contains commit 18af98cee183)

https://github.com/vitest-dev/vitest/commit/18af98cee1830604d57f6a02bf28f8067cdffc06

Vendor Advisories for CVE-2026-47428(2)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatprometheus3-13-main-3.13.1-0.1.hum12026-07-13redhat

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)
npm(1)
PackageVulnerable rangeFixed inDependents
@vitest/browser—5.0.0-beta.3—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 40× 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 188 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-47428?
CVE-2026-47428 is a critical vulnerability published on June 1, 2026. Vitest is a testing framework powered by Vite. From 4.0.17 until 4.1.6 and 5.0.0-beta.3, Vitest Browser Mode served /vitesttest/ with the otelCarrier query parameter inserted directly into an inline module script, allowing a crafted browser-runner URL to execute arbitrary JavaScript in the Vitest…
When was CVE-2026-47428 disclosed?
CVE-2026-47428 was first published in the National Vulnerability Database on June 1, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-47428 actively exploited?
CVE-2026-47428 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 52.1% of all scored CVEs.
What is the CVSS score of CVE-2026-47428?
CVE-2026-47428 has a CVSS v3 base score of 9.6 (NVD).
How do I remediate CVE-2026-47428?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-47428, 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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