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.

Published: 2018-11-27 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-11766 is rated Moderate Risk (57.6/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.49%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2018-11766

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 0.71% 0.49% -0.23%
2 2025-11-18 0.49% 0.71% +0.23%
3 2025-10-28 — 0.49% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-11766

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]
9.0 2.0 HIGH
AV:N/AC:L/Au:S/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.0 10.0 [email protected]

Weakness enumeration for CVE-2018-11766

GitHub Security Advisory for CVE-2018-11766

GHSA-rqj9-cq6j-958r · Severity: high · Ecosystem: maven — Arbitrary Command Execution in Hadoop

OS Trackers for CVE-2018-11766

vendor priority summary link
redhat high — https://access.redhat.com/security/cve/CVE-2018-11766
suse high CVE-2018-11766 severity important: SUSE including 1 source package names (hadoop), 2 product×package rows across 2 product lines (SUSE Manager Server 3.1, SUSE Manager Server 3.2): Known Not Affected 2. https://www.suse.com/security/cve/CVE-2018-11766/

Affected software / configurations for CVE-2018-11766

Vendor Product Version Raw CPE
apache hadoop >= 2.7.4, <= 2.7.6 cpe:2.3:a:apache:hadoop:*:*:*:*:*:*:*:*

References for CVE-2018-11766

cvelogic Threat Intelligence