CVE-2021-26070

Severity: high (CVSS 7.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-03-22 · updated 2026-06-17
Weakness: CWE-287

Description

Affected versions of Atlassian Jira Server and Data Center allow remote attackers to evade behind-the-firewall protection of app-linked resources via a Broken Authentication vulnerability in the `makeRequest` gadget resource. The affected versions are before version 8.13.3, and from version 8.14.0 before 8.14.1.

Affected products

Atlassian Data Center: before 8.13.3; from 8.14.0 before 8.14.1 — fixed in 8.13.3, 8.14.1
Atlassian Jira: before 8.13.3 — fixed in 8.13.3
Atlassian Jira: from 8.14.0 before 8.14.1 — fixed in 8.14.1

How to fix

Upgrade to a fixed version: Atlassian Data Center 8.13.3, 8.14.1; Atlassian Jira 8.13.3; Atlassian Jira 8.14.1. Check the vendor advisory for mitigations.

References

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