CVE-2020-4026

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-06-03 · updated 2026-06-17
Weakness: CWE-863

Description

The CustomAppsRestResource list resource in Atlassian Navigator Links before version 3.3.23, from version 4.0.0 before version 4.3.7, from version 5.0.0 before 5.0.1, and from version 5.1.0 before 5.1.1 allows remote attackers to enumerate all linked applications, including those that are restricted or otherwise hidden, through an incorrect authorization check.

Affected products

Atlassian Navigator Links: before 3.3.23; from 4.0.0 before 4.3.7; from 5.0.0 before 5.0.1; from 5.1.0 before 5.1.1 — fixed in 3.3.23, 4.3.7, 5.0.1, 5.1.1

How to fix

Upgrade to a fixed version: Atlassian Navigator Links 3.3.23, 4.3.7, 5.0.1, 5.1.1. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2020-4026 or the next vulnerability affects your stack