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.

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Atlassian Confluence Data Center affected
Version Status Constraints
10.2.1 to 10.2.15 affected —
10.1.0 to 10.1.2 affected —
10.0.2 to 10.0.3 affected —
9.5.1 to 9.5.4 affected —
9.4.0 to 9.4.1 affected —
9.3.1 to 9.3.2 affected —
9.2.0 to 9.2.23 affected —
9.1.1 affected —
8.9.7 to 8.9.8 affected —
8.5.16 to 8.5.31 affected —
7.19.28 to 7.19.30 affected —
10.2.17 to 10.2.18 unaffected —
9.2.24 to 9.2.25 unaffected —

No data.

No data.

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Vendors Products
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Project Subscriptions

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://confluence.atlassian.com/pages/viewpage.action?pageId=1822852209 cve-icon cve-icon
https://jira.atlassian.com/browse/CONFSERVER-104418 cve-icon cve-icon
History

Tue, 15 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-285

Tue, 15 Sep 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 15 Sep 2026 17:15:00 +0000

Type Values Removed Values Added
Description 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.
First Time appeared Atlassian
Atlassian confluence Data Center
CPEs cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:8.5.22:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:8.5.23:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:8.5.24:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:8.5.25:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:8.5.26:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:8.5.27:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:8.5.28:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:8.5.29:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:8.5.30:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:8.5.31:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:9.1.1:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:9.2.10:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:9.2.11:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:9.2.12:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:9.2.13:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:9.2.14:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:9.2.15:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:9.2.16:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:9.2.17:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:9.2.18:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:9.2.19:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:9.2.20:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:9.2.21:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:9.2.22:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:9.2.23:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:9.2.24:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:9.2.25:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:9.2.2:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:9.2.3:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:9.2.4:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:9.2.5:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:9.2.6:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:9.2.7:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:9.2.8:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:9.2.9:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:confluence_data_center:9.4.1:*:*:*:*:*:*:*
Vendors & Products Atlassian
Atlassian confluence Data Center
References
Metrics cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: atlassian

Published:

Updated: 2026-09-15T20:22:13.651Z

Reserved: 2026-01-01T00:00:40.722Z

Link: CVE-2026-21586

cve-icon Vulnrichment

Updated: 2026-09-15T17:26:22.700Z

cve-icon NVD

Status : Received

Published: 2026-09-15T17:17:11.580

Modified: 2026-09-15T21:16:36.577

Link: CVE-2026-21586

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-15T19:00:13Z

Weaknesses

No weakness.