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Advisory severityHigh7.6Atlassian Updated

High [CVE-2026-21584] Confluence: This High severity Improper Authorization vulnerability was introduced in versions 10.0.0, 10.1.0, 10.2.0, 11.0.0, 12.0.0, and 12.1.0 of Bamboo Data Center

This high-severity Atlassian advisory covers CVE-2026-21584 affecting Bamboo Data Center.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-21584 Source published Source updated

VulniPulse record published Record updated

CVE-2026-21584
Affected products & platforms
AtlassianBamboo / Crowd / Fisheye
Open source advisory

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Summary

This High severity Improper Authorization vulnerability was introduced in versions 10.0.0, 10.1.0, 10.2.0, 11.0.0, 12.0.0, and 12.1.0 of Bamboo Data Center.

This Improper Authorization vulnerability, with a CVSS Score of 7.6, 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 Bamboo 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:

  • Bamboo Data Center 10.2: Upgrade to a release greater than or equal to 10.2.22

See the release notes ( ).

This vulnerability was reported via our Penetration Testing program.

Affected versions
  • Bamboo Data Center 12.1.0 to 12.1.9
  • Bamboo Data Center 12.0.0 to 12.0.2
  • Bamboo Data Center 11.0.0 to 11.0.8
  • Bamboo Data Center 10.2.0 to 10.2.21
  • Bamboo Data Center 10.1.0 to 10.1.1
  • Bamboo Data Center 10.0.0 to 10.0.3

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

Fixed versions
  • 10.2
  • 10.2.22
  • 12.1
  • 12.1.10

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

Mitigation checklist

Recommended fix / mitigation
  • Atlassian recommends that Bamboo 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: * Bamboo Data Center 10.2: Upgrade to a release greater than or equal to 10.2.22 * Bamboo Data Center 12.1: Upgrade to a release greater than or equal to 12.1.10 See the release notes (https://confluence.atlassian.com/bambooreleases/bamboo-release-notes-1189793869.html).

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

Discussion(0)

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