CVE-2020-26168

CRITICAL 9.8CVE-2020-26168 · Published 09/11/2020 · updated 17/06/2026

In short

CVE-2020-26168 is a CRITICAL (CVSS 9.8) vulnerability affecting hazelcast (hazelcast), jet (hazelcast).
Chance of exploitation in the next 30 days (EPSS): 1.6%, higher than 75.7% of all vulnerabilities.
Fix: update to 4.0.3 or later.

Package	Affected versions	Patched versions
hazelcast hazelcast	`≥ 4.0, < 4.0.3`	`4.0.3`
jet hazelcast	`≥ 4.0, ≤ 4.2`	No fix yet

Description

The LDAP authentication method in LdapLoginModule in Hazelcast IMDG Enterprise 4.x before 4.0.3, and Jet Enterprise 4.x through 4.2, doesn't verify properly the password in some system-user-dn scenarios. As a result, users (clients/members) can be authenticated even if they provide invalid passwords.

References

docs.hazelcast.org/docs/ern/index.html · Release Notes
hazelcast.zendesk.com/hc/en-us/articles/360050161951--IMDG-Enterprise-4-0-4-0-1-4-0-2-LDAP-Authentication-Bypass · Vendor Advisory
hazelcast.zendesk.com/hc/en-us/articles/360051384932--JET-Enterprise-4-0-4-1-4-1-1-4-2-LDAP-Authentication-Bypass · Vendor Advisory
jet-start.sh/blog/2020/10/23/jet-43-is-released · Vendor Advisory

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Package

Affected versions

Patched versions

hazelcast

≥ 4.0, < 4.0.3

4.0.3

jet

hazelcast

≥ 4.0, ≤ 4.2

No fix yet

Description

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