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CRITICAL severity

CVE-2022-26612 — hadoop-common

CRITICAL

CVE-2022-26612 is a critical-severity (CVSS 9.8) CWE-59 vulnerability in org.apache.hadoop:hadoop-common. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for org.apache.hadoop:hadoop-common — see the affected versions and patch details below.

Arbitrary file write in FileUtil#unpackEntries on Windows

Also known asGHSA-gx2c-fvhc-ph4j
Published
Updated
Affected
3 pkgs
Patched
3 / 3
Exploits
1 known
Exploitation data as of Nov 5, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
4.2%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs91th percentile — riskier than 91% of all scored CVEsHighest risk
0.00%1.84%3.68%5.52%0.2%4.2%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

3 pkgs affected
☕org.apache.hadoop:hadoop-common☕org.apache.hadoop:hadoop-common☕org.apache.hadoop:hadoop-common

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

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 2.10.2, 3.2.3, 3.3.3, and 3.4.0.

Affected Packages

3 total 3 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.apache.hadoop:hadoop-common≥ 3.2.0&&< 3.2.33.2.3org.apache.hadoop:hadoop-common:3.2.3
☕Mavenorg.apache.hadoop:hadoop-commonall versions2.10.2org.apache.hadoop:hadoop-common:2.10.2
☕Mavenorg.apache.hadoop:hadoop-common≥ 3.3.0&&< 3.3.33.3.3org.apache.hadoop:hadoop-common:3.3.3

Affected Products

1 product · 3 configurations
Application
hadoopapache
< 3.2.3
2 versions
3.3.13.3.2
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

In Apache Hadoop, The unTar function uses unTarUsingJava function on Win…

lists.apache.orgNVDApr 2022

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.hadoop:hadoop-common, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update org.apache.hadoop:hadoop-common to 3.2.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-26612 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

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 fo
O3 Security · Impact-Aware SCA

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CVE-2022-26612: hadoop-common — Fixed in 3.2.3