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Fencer Vulns
high 8.8

CVE-2021-39236 json

Owners of the S3 tokens are not validated

published 2021-11-19 4 y ago modified 2026-06-17 4 mo ago also GHSA-5993-wwpg-m92c , EUVD-2021-2299

cvss
8.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.6%
EPSS 2.6% chance of exploitation in 30 days, percentile 85%
public exploits
0
none known

Summary

In Apache Ozone before 1.2.0, Authenticated users with valid Ozone S3 credentials can create specific OM requests, impersonating any other user.

Patch / fix

  • maven org.apache.hadoop:hadoop-ozone-ozone-manager 1.2.0
  • apache ozone 1.2.0

Exploit prediction

2.64% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • issues.apache.org https://issues.apache.org/jira/browse/HDDS-4763 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.5 AV:N/AC:L/Au:S/C:P/I:P/A:P
GitHub 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
maven org.apache.hadoop:hadoop-ozone-ozone-manager
<1.2.0
1.2.0

Affected products

  • Apache Software Foundation Apache Ozone

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.