CVE-2026-21586

This High severity Improper Authorization vulnerability was introduced in versions 7.4.0, 7.13.0, 8.5.0, 8.9.0, 9.0.1, 9.1.0, 9.2.0, 9.3.1, 9.4.0, 9.5.1, 10.0.2, 10.1.0, and 10.2.0 of Confluence Data Center. This Improper Authorization vulnerability, with a CVSS Score of 7.1, allows an authenticated attacker to gain unintended access and can lead to the exposure of resources or functionality, possibly providing attackers with sensitive information or even execute arbitrary code. Atlassian recommends that Confluence Data Center customers upgrade to latest version, if you are unable to do so, upgrade your instance to one of the specified supported fixed versions: Confluence Data Center 9.2: Upgrade to a release greater than or equal to 9.2.24 Confluence Data Center 10.2: Upgrade to a release greater than or equal to 10.2.17 See the release notes ([https://confluence.atlassian.com/doc/confluence-release-notes-327.html]). You can download the latest version of Confluence Data Center from the download center ([https://www.atlassian.com/software/confluence/download-archives]). This vulnerability was reported via our Penetration Testing program.

CVSS

No CVSS.

References

Link	Resource
https://confluence.atlassian.com/pages/viewpage.action?pageId=1822852209
https://jira.atlassian.com/browse/CONFSERVER-104418

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-15 17:17

Updated : 2026-09-16 04:18

NVD link : CVE-2026-21586

Mitre link : CVE-2026-21586

CVE.ORG link : CVE-2026-21586

JSON object : View

Products Affected

No product.

CWE

CWE-285

Improper Authorization

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