What is CVE-2022-26612?

CVE-2022-26612 is a critical-severity vulnerability in Apache Hadoop, classified under Improper Link Resolution Before File Access. CVSS score: 9.8/10. Published 2022-04-07.

How severe is CVE-2022-26612?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2022-26612 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Apache Hadoop

CVE-2022-26612

In Apache Hadoop, The unTar function uses unTarUsingJava function on Windows and the built-in tar utility on Unix and other OSes. As a result, a TAR entry may create a symlink under the expected extraction directory which points to an external directory. A subsequent TAR entry may extract an arbitrary file into the external directory using the symlink name. This however would be caught by the same targetDirPath check on Unix because of the getCanonicalPath call. However on Windows, getCanonicalPath doesn't resolve symbolic links, which bypasses the check. unpackEntries during TAR extraction follows symbolic links which allows writing outside expected base directory on Windows. This was addressed in Apache Hadoop 3.2.3

Published 2022-04-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.042 (91.0th percentile), scored 2026-11-01.

Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 91.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.042 · newest: 0.042 · change: 0.000

Affected products

Apache Hadoop — versions 3.3.1, 3.3.2
Apache Software Foundation Hadoop — versions unspecified, 3.3.1, 3.3.2
Microsoft Windows

Weakness classification (CWE)

CWE-59 — Improper Link Resolution Before File Access

Public proof-of-concept exploits

muneebaashiq/MBProjects

References

lists.apache.org/thread/hslo7wzw2449gv1jyjk8g6ttd7935fyz (Exploit, Vendor Advisory)
security.netapp.com/advisory/ntap-20220519-0004/ (Third Party Advisory)

Frequently asked questions

What is CVE-2022-26612?: CVE-2022-26612 is a critical-severity vulnerability in Apache Hadoop, classified under Improper Link Resolution Before File Access. CVSS score: 9.8/10. Published 2022-04-07.
How severe is CVE-2022-26612?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2022-26612 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.