How severe is CVE-2021-33036?

CVE-2021-33036 has a CVSS score of 8.8/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2021-33036?

CVE-2021-33036 affects the following packages: org.apache.hadoop:hadoop-yarn-server-common (Maven), org.apache.hadoop:hadoop-yarn-server-common (Maven), org.apache.hadoop:hadoop-yarn-server-common (Maven). Ecosystems affected: Maven.

How do I fix CVE-2021-33036?

Update org.apache.hadoop:hadoop-yarn-server-common to 2.10.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-33036 is resolved across your whole dependency graph.

How do I detect CVE-2021-33036 in my Maven dependencies?

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

How do I mitigate CVE-2021-33036 if there is no patch (or I can't update yet)?

Resolve every user-supplied path to its canonical form and reject anything that escapes the intended directory, and run the component under an account that has no read or write access outside the directory it legitimately serves.

Is CVE-2021-33036 actively exploited in the wild?

No public exploit code has been indexed for CVE-2021-33036 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2021-33036?

CVE-2021-33036 has an EPSS (Exploit Prediction Scoring System) score of 4.0%, placing it in the 90th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2021-33036?

CVE-2021-33036 is classified as CWE-24 (CWE-24), CWE-264 (CWE-264), Path Traversal (CWE-22). These weakness types describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2021-33036 published, and has it been updated?

CVE-2021-33036 was published on June 15, 2022 and was last updated on October 24, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕

☕ Maven

Not in CISA KEV

HIGH severity

CVE-2021-33036 — hadoop-yarn-server-common

HIGHFix: apache/hadoop@227d64a

CVE-2021-33036 is a high-severity (CVSS 8.8) CWE-24 vulnerability in org.apache.hadoop:hadoop-yarn-server-common. A fix is available for org.apache.hadoop:hadoop-yarn-server-common — see the affected versions and patch details below.

User account escalation in Apache Hadoop

Also known asGHSA-58jx-f5rf-qgqf

Published

Jun 15, 2022

Updated

Oct 24, 2026

Affected

3 pkgs

Patched

3 / 3

Exploits

None indexed

Exploitation data as of Nov 3, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

4.0%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs90th percentile — riskier than 90% of all scored CVEsHighest risk

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-yarn-server-common☕org.apache.hadoop:hadoop-yarn-server-common☕org.apache.hadoop:hadoop-yarn-server-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 2.2.0 to 2.10.1, 3.0.0-alpha1 to 3.1.4, 3.2.0 to 3.2.2, and 3.3.0 to 3.3.1, a user who can escalate to yarn user can possibly run arbitrary commands as root user. Users should upgrade to Apache Hadoop 2.10.2, 3.2.3, 3.3.2 or higher.

Affected Packages

3 total 3 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.apache.hadoop:hadoop-yarn-server-common`	≥ 2.2.0&&< 2.10.2	2.10.2`org.apache.hadoop:hadoop-yarn-server-common:2.10.2`
☕Maven	`org.apache.hadoop:hadoop-yarn-server-common`	≥ 3.0.0&&< 3.2.3	3.2.3`org.apache.hadoop:hadoop-yarn-server-common:3.2.3`
☕Maven	`org.apache.hadoop:hadoop-yarn-server-common`	≥ 3.3.0&&< 3.3.2	3.3.2`org.apache.hadoop:hadoop-yarn-server-common:3.3.2`

Affected Products

1 product · 7 configurations

Application

hadoopapache

≥ 3.3.0 && < 3.3.2

1 version

3.0.0

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.hadoop:hadoop-yarn-server-common, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.apache.hadoop:hadoop-yarn-server-common to 2.10.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-33036 is resolved across your whole dependency graph.
Workarounds
Resolve every user-supplied path to its canonical form and reject anything that escapes the intended directory, and run the component under an account that has no read or write access outside the directory it legitimately serves.

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2021-33036 in your dependencies?

Find it across Maven, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

8.8/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Raw vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE Classification

CWE-24CWE-24 CWE-264CWE-264 CWE-22Path Traversal

Weaponization

No Nuclei template, Metasploit module or public proof-of-concept found.

OpenSSF Scorecard

Package health score

hadoop

7.7/10

Code-Review10/10

Maintained10/10

Branch-ProtectionN/A

Assessed Nov 2, 2026

Timeline

Disclosed

Jun 15, 2022

Last updated

Oct 24, 2026

Identifiers

CVE-2021-33036

GHSA-58jx-f5rf-qgqf

References

Advisoryopenwall.com Advisorylists.apache.org · ctr84rmo3xd2tzqcx2b277c8z692vhl5 Advisorysecurity.netapp.com · ntap 20220722 0003 Advisorynvd.nist.gov · CVE 2021 33036 Webgithub.com · 227d64ab59e8aa6477769b2542ad0cd7a6d855cb Webgithub.com · 45801fba8b00257ab32c02a7d1a05948ba687a49 Webgithub.com · ba041fe6d34215f075e0a7b2078d7273147e14b7 Websecurity.netapp.com · ntap 20220722 0003 Packagegithub.com · hadoop

Related vulnerabilities

This CVE is high severity; 5 of 8 other CVEs with CWE-24 are rated as high or higher (top: high).

CVE-2026-34151CVE-2026-48047CVE-2026-22810CVE-2026-40318CVE-2024-43035CVE-2025-67364CVE-2026-21857CVE-2025-59342Browse all CWE-24

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedOct 24, 2026

CVE-2021-33036 — hadoop-yarn-server-common

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

Frequently Asked Questions

Is CVE-2021-33036 in your dependencies?