CVE-2021-4238

CRITICALNVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.1 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 43% 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, nvd
9.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.1Exploit: NoneExposed: 0

A fix is available — apply it.

Randomly-generated alphanumeric strings contain significantly less entropy than expected. The RandomAlphaNumeric and CryptoRandomAlphaNumeric functions always return strings containing at least one digit from 0 to 9. This significantly reduces the amount of entropy in short strings generated by these functions.

CVSS v3
9.1
EG Score
9.1(medium)
EPSS
67.8%
KEV
Not listed

Published

December 27, 2022

Last Modified

April 11, 2025

Advisory Details (2)

Auto-updated Jul 19, 2026
Patch available. Sources: github_commit.
generic

GO-2022-0411 - Go Packages

https://pkg.go.dev/vuln/GO-2022-0411
github_commit Patch Available

commit 869801f20f9f (Masterminds/goutils)

Patch available: Masterminds/goutils v1.1.1 (contains commit 869801f20f9f)

https://github.com/Masterminds/goutils/commit/869801f20f9f1e7ecdbdb6422049d8241270d5e1

Vendor Advisories for CVE-2021-4238(20)

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

Patch Availability(23)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatodf4/mcg-rhel9-operator:v4.13.0-412023-06-21redhat
redhatopenshift4/ose-machine-config-operator:v4.13.0-202304251516.p0.g70aa0a5.assembly.stream2023-05-17redhat
redhatopenshift4/ose-kubernetes-nmstate-handler-rhel8:v4.10.0-202303162241.p0.g68b1665.assembly.stream2023-03-29redhat
redhatopenshift4/ose-kubernetes-nmstate-handler-rhel8:v4.11.0-202303151654.p0.g4695e71.assembly.stream2023-03-22redhat
redhatopenshift4/ose-kubernetes-nmstate-handler-rhel8:v4.12.0-202303081941.p0.gc56075a.assembly.stream2023-03-21redhat
redhatopenshift4/ose-machine-config-operator:v4.10.0-202303032215.p0.ga21b2b8.assembly.stream2023-03-16redhat
redhatopenshift4/dpu-network-rhel8-operator:v4.11.0-202302282354.p0.g7183b08.assembly.stream2023-03-14redhat
redhatodf4/mcg-rhel8-operator:v4.12.1-42023-03-08redhat
redhatopenshift4/ose-installer:v4.10.0-202302161028.p0.g8862860.assembly.stream2023-03-01redhat
redhatopenshift4/ose-installer:v4.11.0-202302130454.p0.g59d1196.assembly.stream2023-02-21redhat
redhatopenshift4/dpu-network-rhel8-operator:v4.12.0-202302111028.p0.gb6124a7.assembly.stream2023-02-20redhat
redhatopenshift-gitops-1/kam-delivery-rhel8:v1.5.10-62023-02-17redhat
redhatopenshift-gitops-1/kam-delivery-rhel8:v1.7.2-52023-02-17redhat
redhatopenshift-gitops-1/kam-delivery-rhel8:v1.6.5-52023-02-17redhat
redhatopenshift4/ose-installer:v4.12.0-202302080355.p0.gb8d2457.assembly.stream2023-02-16redhat
redhatopenshift4/ose-machine-config-operator:v4.11.0-202302071115.p0.gc101063.assembly.stream2023-02-15redhat
redhatopenshift4/ose-cluster-network-operator:v4.9.0-202301301454.p0.gbb98961.assembly.stream2023-02-13redhat
redhatopenshift4/ose-cluster-network-operator:v4.10.0-202301310115.p0.gdc0a59a.assembly.stream2023-02-08redhat
redhatopenshift4/ose-machine-config-operator:v4.12.0-202301262025.p0.ge3dc943.assembly.stream2023-02-07redhat
redhatopenshift4/ose-image-customization-controller-rhel8:v4.11.0-202301252336.p0.ge0e3979.assembly.stream2023-02-07redhat
redhatopenshift4/ose-image-customization-controller-rhel8:v4.12.0-202301171655.p0.g27777d0.assembly.stream2023-01-30redhat
redhatservicemesh-operator-0:2.1.6-1.el82023-01-30redhat
redhatopenshift-service-mesh/istio-rhel8-operator:2.3.1-102023-01-30redhat

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/Masterminds/goutils—1.1.1—

Weakness Classification(1)

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

Additional Vendor Advisories

(4)

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 11× in last 7d / 47× 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.

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

Frequently asked(5)

What is CVE-2021-4238?
CVE-2021-4238 is a critical vulnerability published on December 27, 2022. Randomly-generated alphanumeric strings contain significantly less entropy than expected. The RandomAlphaNumeric and CryptoRandomAlphaNumeric functions always return strings containing at least one digit from 0 to 9. This significantly reduces the amount of entropy in short strings generated by…
When was CVE-2021-4238 disclosed?
CVE-2021-4238 was first published in the National Vulnerability Database on December 27, 2022, with the most recent update on April 11, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-4238 actively exploited?
CVE-2021-4238 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 67.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-4238?
CVE-2021-4238 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2021-4238?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-4238, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-4238

Explore →

Is Your Infrastructure Affected by CVE-2021-4238?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs