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High8.2Atlassian

High [CVE-2026-21579] This High severity Information Disclosure vulnerability was introduced in versions 7.17.0, 7.19.0, 8.5.0, 8.9.0, 9.0.1, 9.1.0, 9.2.0, 10.0.2, 10.1.0, and 10.2.0 of Confluence Data Center

This high-severity Atlassian advisory covers CVE-2026-21579 affecting Confluence Data Center.

CVE-2026-21579 Published Jul 21, 2026Updated by vendor Aug 11, 2026
CVE-2026-21579
Affected products & platforms
AtlassianConfluence
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Summary

This High severity Information Disclosure vulnerability was introduced in versions 7.17.0, 7.19.0, 8.5.0, 8.9.0, 9.0.1, 9.1.0, 9.2.0, 10.0.2, 10.1.0, and 10.2.0 of Confluence Data Center.

This Information Disclosure vulnerability, with a CVSS Score of 8.2, allows an unauthenticated attacker to view sensitive information via an Information Disclosure vulnerability.

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 9.2.22

See the release notes ([ ]).

This vulnerability was reported via our Atlassian (Internal) program.

Affected versions
  • Confluence Data Center 10.2.0 to 10.2.13
  • Confluence Data Center 10.1.0 to 10.1.2
  • Confluence Data Center 10.0.2 to 10.0.3
  • Confluence Data Center 9.2.0 to 9.2.21
  • Confluence Data Center 9.1.0 to 9.1.1
  • Confluence Data Center 9.0.1 to 9.0.3
  • Confluence Data Center 8.9.5 to 8.9.8
  • Confluence Data Center 8.5.14 to 8.5.31
  • Confluence Data Center 7.19.26 to 7.19.30

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions
  • 9.2.22
  • 10.2
  • 10.2.14

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • 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 9.2.22 Confluence Data Center 10.2: Upgrade to a release greater than or equal to 10.2.14 See the release notes ([https://confluence.atlassian.com/doc/confluence-release-notes-327.html]).

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

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