How severe is CVE-2018-11765?

CVE-2018-11765 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2018-11765 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-11765?

CVE-2018-11765 primarily affects Apache Hadoop. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-11765?

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-2018-11765 published?

CVE-2018-11765 was published on 2020-09-30 and last updated on 2026-06-17.

CVE-2018-11765

CVE-2018-11765 is a high-severity vulnerability in Apache Hadoop with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 4.3
EPSS exploit prediction: 5% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Apache Hadoop
Published: 2020-09-30
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2018-11765?: 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.
How severe is CVE-2018-11765?: CVE-2018-11765 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2018-11765 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-11765?: CVE-2018-11765 primarily affects Apache Hadoop. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-11765?: 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-2018-11765 published?: CVE-2018-11765 was published on 2020-09-30 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:apache:hadoop:*:*:*:*:*:*:*:*
cpe:2.3:a:apache:hadoop:3.0.0:-:*:*:*:*:*:*
cpe:2.3:a:apache:hadoop:3.0.0:alpha2:*:*:*:*:*:*

More vulnerabilities in Apache Hadoop

CVE-2022-25168 — Critical (CVSS 9.8): Apache Hadoop's FileUtil.unTar(File, File) API does not escape the input file name before being passed to the shell. An…
CVE-2021-37404 — Critical (CVSS 9.8): There is a potential heap buffer overflow in Apache Hadoop libhdfs native code. Opening a file path provided by user…
CVE-2022-26612 — Critical (CVSS 9.8): In Apache Hadoop, The unTar function uses unTarUsingJava function on Windows and the built-in tar utility on Unix and…
CVE-2019-17195 — Critical (CVSS 9.8): Connect2id Nimbus JOSE+JWT before v7.9 can throw various uncaught exceptions while parsing a JWT, which could result in…
CVE-2017-15718 — Critical (CVSS 9.8): The YARN NodeManager in Apache Hadoop 2.7.3 and 2.7.4 can leak the password for credential store provider used by the…
CVE-2012-4449 — Critical (CVSS 9.8): Apache Hadoop before 0.23.4, 1.x before 1.0.4, and 2.x before 2.0.2 generate token passwords using a 20-bit secret when…

All CVEs affecting Apache Hadoop →

Other CWE-287 (Improper Authentication) vulnerabilities

CVE-2026-20317 — Critical (CVSS 10.0): As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Secure Workload engineering…
CVE-2026-19977 — Critical (CVSS 10.0): A vulnerability was detected in EFM ipTIME A3004T 14.19.0. The affected element is the function…
CVE-2026-59500 — Critical (CVSS 10.0): CWE-287: Improper Authentication
CVE-2024-27253 — Critical (CVSS 10.0): IBM DOORS Next 7.0.3 through 7.0.3 Interim Fix 018 could allow an authenticated user to bypass security logic to…
CVE-2026-56162 — Critical (CVSS 10.0): Improper authentication in Azure SQL Database allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-62825 — Critical (CVSS 10.0): Improper authentication in Azure Key Vault allows an unauthorized attacker to elevate privileges over a network.

Browse all CWE-287 (Improper Authentication) vulnerabilities →