No exploitation reportedFix available

CVE-2018-11765

Q: Is CVE-2018-11765 actively exploited?

Active exploitation of CVE-2018-11765 has not been confirmed. Its EPSS score was 5.2% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2018-11765?

CVE-2018-11765 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

No exploitation reported by the sources we read.

Published2020-09-30
WeaknessCWE-287

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC

2020-09-3018:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2018-11765?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-11765?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Apache hadoop

Branch	Affected	Fixed in	Source
2.8	≥ 2.8.0, ≤ 2.8.5	no fix published	NVD
2.9	≥ 2.9.0, ≤ 2.9.2	no fix published	NVD
3.0	= 3.0.0	no fix published	NVD

hadoop-main

Branch	Affected	Fixed in	Source
3.0	≥ 3.0.0-alpha2, < 3.0.1	3.0.1	OSV
2.9	≥ 2.9.0, < 2.9.3	2.9.3	OSV
2.8	≥ 2.8.0, < 2.8.6	2.8.6	OSV

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

lists.apache.orgVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.17.5read 2026-10-23
NVDCVSS 2.04.3read 2026-10-23
NVDweakness (CWE)CWE-287read 2026-10-23
FIRST EPSSEPSS score5.2 %2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published: 2020-09-30
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2018-11765?

Is CVE-2018-11765 actively exploited?

Active exploitation of CVE-2018-11765 has not been confirmed. Its EPSS score was 5.2% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-11765?

CVE-2018-11765 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

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