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Fencer Intel
high 8.8

CVE-2018-11766 json

Arbitrary Command Execution in Hadoop

published 7y ago modified 4mo ago also GHSA-rqj9-cq6j-958r , EUVD-2018-0821

cvss
8.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.2%
EPSS 3.2% chance of exploitation in 30 days, percentile 88%
public exploits
0
none known

Summary

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.

Patch / fix

  • maven org.apache.hadoop:hadoop-main 2.7.7

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-11766 updated cvss 7.5

hadoop: Privilege escalation to root (Incomplete fix for CVE-2016-6811)

  • Red Hat Fuse 7 camel Red Hat JBoss Fuse 6 camel Red Hat Storage 3 rhs-hadoop
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.24% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 8.8 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 9.0 AV:N/AC:L/Au:S/C:C/I:C/A:C
GitHub 3.0 8.8 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
maven org.apache.hadoop:hadoop-main
>=2.7.4, <2.7.7
2.7.7

Affected products

  • Apache Software Foundation Apache Hadoop

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.