CVE-2020-4026

Name: CVE-2020-4026
Creator: NVD / NIST
Published: 2020-06-03T00:15:10.857+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 0.75%

Last modified Jun 17, 2026

CVE-2020-4026 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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.. EPSS estimates a 0.75% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

4.3/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS Probability

0.75%

50.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-863

Affected Software

Vendor	Product	Versions
Atlassian	Navigator Links	< 3.3.23
Atlassian	Navigator Links	>= 4.0.0, < 4.3.7
Atlassian	Navigator Links	>= 5.0.0, < 5.0.1
Atlassian	Navigator Links	>= 5.1.0, < 5.1.1

References

https://jira.atlassian.com/browse/CRUC-8485Vendor Advisory
https://jira.atlassian.com/browse/FE-7299Vendor Advisory
https://jira.atlassian.com/browse/CRUC-8485Vendor Advisory
https://jira.atlassian.com/browse/FE-7299Vendor Advisory

Timeline

Published: Jun 3, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-4026?

How severe is CVE-2020-4026?

CVE-2020-4026 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.75% probability of exploitation in the next 30 days.

How do I fix CVE-2020-4026?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-4026?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST