TI-2025-20593 Aliases CVE-2025-27821 GHSA-92cc-952p-v8rh

HDFS native client: Out of bounds write in URI parser of native HDFS client

MEDIUM 40CWE-787Published 2026-01-26 · Updated 2026-01-26

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: Low · Low · Low
Fix status: Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub.

Summary

Out-of-bounds Write vulnerability in Apache Hadoop HDFS native client. This issue affects Apache Hadoop: from 3.2.0 before 3.4.2. Users are recommended to upgrade to version 3.4.2, which fixes the issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00906 60th percentileScored 2026-11-07

Fix Fixed HDFS native client (Apache Software Foundation): 3.4.2org.apache.hadoop:hadoop-hdfs-native-client (Maven): 3.4.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Apache	HDFS native client	3.2.0 to before 3.4.2	3.4.2	Patch available	CNA
—	org.apache.hadoop:hadoop-hdfs-native-client (Maven)	3.2.0 to before 3.4.2	3.4.2	Patch available	GHSA-92cc-952p-v8rh

HDFS native client VendorApache Affected 3.2.0 to before 3.4.2 Fixed in 3.4.2 Patch available CNA
org.apache.hadoop:hadoop-hdfs-native-client (Maven) Vendor— Affected 3.2.0 to before 3.4.2 Fixed in 3.4.2 Patch available GHSA-92cc-952p-v8rh

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:apache:hadoop::::::::	3.2.0 to before 3.4.2	Vulnerable	Apache

cpe:2.3:a:apache:hadoop:*:*:*:*:*:*:*:* Versions 3.2.0 to before 3.4.2 Vulnerable ·Apache

Remediation

Fix · CNA HDFS native client (Apache Software Foundation) Fixed in 3.4.2
Fix · GHSA-92cc-952p-v8rh org.apache.hadoop:hadoop-hdfs-native-client (Maven) Fixed in 3.4.2 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2025-27821
2026-10-03 Alias added: GHSA-92cc-952p-v8rh

References

Advisory 3

Other 4

TI-2019-12818 Connect2id Nimbus JOSE+JWT before v7.9 can throw various uncaught exceptions while… CVSS 3.1CRITICAL 9.8
TI-2022-09898 Arbitrary file write in FileUtil#unpackEntries on Windows CVSS 3.1CRITICAL 9.8
TI-2022-08881 Command injection in org.apache.hadoop.fs.FileUtil.unTarUsingTar CVSS 3.1CRITICAL 9.8
TI-2021-15353 Heap buffer overflow in libhdfs native library CVSS 3.1CRITICAL 9.8
TI-2018-05786 Path traversal in Apache Hadoop CVSS 3.0HIGH 8.8
TI-2017-11489 Information disclosure in Apache Hadoop CVSS 3.0CRITICAL 9.8

See all 36 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences