How severe is CVE-2018-11766?

CVE-2018-11766 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-11766 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-11766?

CVE-2018-11766 affects Apache Hadoop. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-11766?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-11766 published?

CVE-2018-11766 was published on 2018-11-27 and last updated on 2026-06-17.

CVE-2018-11766

CVE-2018-11766 is a high-severity vulnerability in Apache Hadoop with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Apache Hadoop
Published: 2018-11-27
Last modified: 2026-06-17

Description

In Apache Hadoop 2.7.4 to 2.7.6, the security fix for CVE-2016-6811 is incomplete. A user who can escalate to yarn user can possibly run arbitrary commands as root user.

Frequently asked questions

What is CVE-2018-11766?: In Apache Hadoop 2.7.4 to 2.7.6, the security fix for CVE-2016-6811 is incomplete. A user who can escalate to yarn user can possibly run arbitrary commands as root user.
How severe is CVE-2018-11766?: CVE-2018-11766 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-11766 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-11766?: CVE-2018-11766 affects Apache Hadoop. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-11766?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-11766 published?: CVE-2018-11766 was published on 2018-11-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:hadoop:*:*:*:*:*:*:*:*

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