CVE-2018-11765

Improper Authentication in Apache Hadoop

7.5 HighFix available

In Apache Hadoop versions 3.0.0-alpha2 to 3.0.0, 2.9.0 to 2.9.2, 2.8.0 to 2.8.5, any users can access some servlets without authentication when Kerberos authentication is enabled and SPNEGO through HTTP is not enabled.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: None
Availability: None

Exploit likelihood

5.21%Down 2.4 points since Apr 14, 2021

What each source reports

NVD Score used 7.5

Record: CVE-2018-11765
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:P/I:N/A:N
Weakness: CWE-287
Updated: 2026-11-02

CVE List No score

Record: CVE-2018-11765
Updated: 2026-11-02

EUVDEUVD-2021-0868 No score

Record: EUVD-2021-0868
Updated: 2026-11-03

GitHub AdvisoriesGHSA-rhh9-cm65-3w54 7.5

Improper Authentication in Apache Hadoop

Record: GHSA-rhh9-cm65-3w54
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-287
Updated: 2026-11-02

OSV 7.5

Record: CVE-2018-11765
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated: 2026-11-02

OSVGHSA-rhh9-cm65-3w54 7.5

Improper Authentication in Apache Hadoop

Record: GHSA-rhh9-cm65-3w54
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-287
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`org.apache.hadoop:hadoop-main` Maven	3.0.0-alpha2 to 3.0.0	3.0.1
`org.apache.hadoop:hadoop-main` Maven	2.9.0 to 2.9.2	2.9.3
`org.apache.hadoop:hadoop-main` Maven	2.8.0 to 2.8.5	2.8.6
`org.apache.hadoop:hadoop-main` Maven	3.0.0-alpha2 up to 3.0.1, plus listed versions 3.0.03.0.0-alpha33.0.0-alpha43.0.0-beta1	3.0.1
`org.apache.hadoop:hadoop-main` Maven	2.9.0 up to 2.9.3, plus listed versions 2.9.12.9.2	2.9.3
`org.apache.hadoop:hadoop-main` Maven	2.8.0 up to 2.8.6, plus listed versions 2.8.12.8.22.8.32.8.42.8.5	2.8.6

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases, products	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-11765 is a high vulnerability (CVSS 7.5) in Apache Hadoop, published September 30, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 5.21%, the 92nd percentile. Fixed in org.apache.hadoop:hadoop-main 3.0.1.

References

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