How severe is CVE-2012-4449?

CVE-2012-4449 has a CVSS score of 9.8/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by CVE-2012-4449?

CVE-2012-4449 affects the following packages: org.apache.hadoop:hadoop-client (Maven), org.apache.hadoop:hadoop-client (Maven), org.apache.hadoop:hadoop-client (Maven). Ecosystems affected: Maven.

How do I fix CVE-2012-4449?

Update org.apache.hadoop:hadoop-client to 0.23.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2012-4449 is resolved across your whole dependency graph.

How do I detect CVE-2012-4449 in my Maven dependencies?

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

How do I mitigate CVE-2012-4449 if there is no patch (or I can't update yet)?

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.

Is CVE-2012-4449 actively exploited in the wild?

No public exploit code has been indexed for CVE-2012-4449 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-2012-4449?

CVE-2012-4449 has an EPSS (Exploit Prediction Scoring System) score of 1.2%, placing it in the 68th 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-2012-4449?

CVE-2012-4449 is classified as Broken Cryptographic Algorithm (CWE-327). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2012-4449 published, and has it been updated?

CVE-2012-4449 was published on May 17, 2022 and was last updated on November 8, 2023. 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

CRITICAL severity

CVE-2012-4449 — hadoop-client

CRITICAL

CVE-2012-4449 is a critical-severity (CVSS 9.8) Broken Cryptographic Algorithm vulnerability in org.apache.hadoop:hadoop-client. A fix is available for org.apache.hadoop:hadoop-client — see the affected versions and patch details below.

Use of a Broken or Risky Cryptographic Algorithm in Apache Hadoop

Published

May 17, 2022

Updated

Nov 8, 2023

Affected

3 pkgs

Patched

3 / 3

Exploits

None indexed

Exploitation data as of Oct 29, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

1.2%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs68th percentile — riskier than 68% 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-client☕org.apache.hadoop:hadoop-client☕org.apache.hadoop:hadoop-client

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

Apache Hadoop before 0.23.4, 1.x before 1.0.4, and 2.x before 2.0.2 generate token passwords using a 20-bit secret when Kerberos security features are enabled, which makes it easier for context-dependent attackers to crack secret keys via a brute-force attack.

Affected Packages

3 total 3 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.apache.hadoop:hadoop-client`	all versions	0.23.4`org.apache.hadoop:hadoop-client:0.23.4`
☕Maven	`org.apache.hadoop:hadoop-client`	≥ 1.0.0&&< 1.0.4	1.0.4`org.apache.hadoop:hadoop-client:1.0.4`
☕Maven	`org.apache.hadoop:hadoop-client`	≥ 2.0.0&&< 2.0.2	2.0.2`org.apache.hadoop:hadoop-client:2.0.2`

Affected Products

1 product · 8 configurations

Application

hadoopapache

≤ 0.23.3

7 versions

1.0.01.0.11.0.21.0.32.0.02.0.12.0.2

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-client, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.apache.hadoop:hadoop-client to 0.23.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2012-4449 is resolved across your whole dependency graph.
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

O3 Security · Impact-Aware SCA

Is CVE-2012-4449 in your dependencies?

Find it across Maven, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

9.8/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Raw vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE Classification

CWE-327Broken Cryptographic Algorithm

Weaponization

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

Timeline

Disclosed

May 17, 2022

Last updated

Nov 8, 2023

Identifiers

CVE-2012-4449

References

Advisorynvd.nist.gov · CVE 2012 4449 Webcloudera.com · csb topic 1 Webmail-archives.apache.org · <CA+z3+9FYdPmzBEaMZ71SUqzRx=eU=o4mSHUsbrpzgR9X [email protected]>

Related vulnerabilities

Also affects hadoop-client

This CVE is critical severity — higher than any of the other 4 CVEs affecting hadoop-client (highest there: high).

CVE-2014-3627CVE-2012-3376CVE-2017-3162CVE-2017-3161

Same weakness: CWE-327

This CVE is critical severity — higher than any of the other 4 CVEs with CWE-327 (highest there: high).

CVE-2026-102824CVE-2026-54147GHSA-9h47-pqcx-hjr4CVE-2026-50268Browse all CWE-327

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedNov 8, 2023

CVE-2012-4449 — hadoop-client

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-2012-4449 in your dependencies?