CVE-2020-9492

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: 4.4%, top 10% 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
Trending — 3 sources updated this week
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 4%CVSS: 8.8Exploit: NoneExposed: 0

A fix is available — apply it.

In Apache Hadoop 3.2.0 to 3.2.1, 3.0.0-alpha1 to 3.1.3, and 2.0.0-alpha to 2.10.0, WebHDFS client might send SPNEGO authorization header to remote URL without proper verification.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
—
EPSS
90.3%
KEV
Not listed

Published

January 26, 2021

Last Modified

November 21, 2024

References (32)

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
redhathadoop-hdfs-client2022-09-09redhat
redhatpatch2022-07-19redhat

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)
Maven(1)
PackageVulnerable rangeFixed inDependents
org.apache.hadoop:hadoop-common2.0.1-alpha ... 2.9.2 (39 versions)2.10.1—

Weakness Classification(1)

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

All Vendor Advisories

(2)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 13× in last 7d / 51× 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 103 total refreshes for this CVE.

  1. 2026-07-22 22:42 UTCEG score recompute
  2. 2026-07-22 14:05 UTCEPSS rescore
  3. 2026-07-21 15:22 UTCEPSS rescore
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  9. 2026-07-19 03:22 UTCOSV refresh
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  1. 2026-07-08 15:12 UTCEPSS rescore
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  10. 2026-07-02 16:57 UTCEPSS rescore
  11. 2026-07-01 15:03 UTCEPSS rescore
  12. 2026-07-01 09:48 UTCOSV refresh
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  27. 2026-06-22 14:23 UTCEPSS rescore
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  40. 2026-06-13 22:58 UTCEPSS rescore
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  42. 2026-06-13 15:13 UTCOSV refresh
  43. 2026-06-12 23:10 UTCEPSS rescore
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  45. 2026-06-11 13:58 UTCEPSS rescore
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  47. 2026-06-10 22:16 UTCEPSS rescore
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  49. 2026-06-08 14:15 UTCEPSS rescore
  50. 2026-06-07 15:23 UTCEPSS rescore
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  52. 2026-06-06 13:46 UTCEPSS rescore
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  72. 2026-05-27 13:39 UTCEPSS rescore
  73. 2026-05-26 21:38 UTCEG score recompute
  74. 2026-05-26 21:38 UTCVendor advisory
  75. 2026-05-26 13:42 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2020-9492?
CVE-2020-9492 is a high vulnerability published on January 26, 2021. In Apache Hadoop 3.2.0 to 3.2.1, 3.0.0-alpha1 to 3.1.3, and 2.0.0-alpha to 2.10.0, WebHDFS client might send SPNEGO authorization header to remote URL without proper verification.
When was CVE-2020-9492 disclosed?
CVE-2020-9492 was first published in the National Vulnerability Database on January 26, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-9492 actively exploited?
CVE-2020-9492 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 90.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2020-9492?
CVE-2020-9492 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2020-9492?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-9492, 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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