CVE-2020-9492
No exploitation reported by the sources we read.
- Published2021-01-26
- WeaknessCWE-863
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
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.
Timeline
dates in UTC- 2021-01-2618:16CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 18:48 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-9492?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-9492?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 2.x | ≥ 2.0.0, ≤ 2.10.0 | no fix published | NVD |
| 3.x | ≥ 3.0.0, ≤ 3.1.3 | no fix published | NVD |
| 3.2 | ≥ 3.2.0, ≤ 3.2.1 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 8.6 | = 8.6.0 | no fix published | NVD |
| 8.6 | = 8.6.2 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 8.0 | = 8.0.8.2.0 | no fix published | NVD |
| 8.0 | = 8.0.8.3.0 | no fix published | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
Advisories and patches
- lists.apache.orgVendor Advisory
- www.oracle.comPatch
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- NVDCVSS 3.18.8read 2026-10-23
- NVDCVSS 2.06.5read 2026-10-23
- NVDweakness (CWE)CWE-863read 2026-10-23
- FIRST EPSSEPSS score4.5 %2026-10-22
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Published
- 2021-01-26
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2020-9492?
Is CVE-2020-9492 actively exploited?
What is the CVSS score for CVE-2020-9492?
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