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CVE-2026-21584PATCHED
atlassian · bamboo data center

CVE-2026-21584: This High severity Improper Authorization vulnerability was introduced in versions 10.0.0, 10.1.0, 10.2.0, 11.0.0, 12.0.

Description

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 * 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). You can download the latest version of Bamboo Data Center from the download center (https://www.atlassian.com/software/bamboo/download-archives). This vulnerability was reported via our Penetration Testing program.

Affected Products

VendorProductVersions
atlassianbamboo data center12.1.0 to 12.1.9, 12.0.0 to 12.0.2, 11.0.0 to 11.0.8, 10.2.0 to 10.2.21, 10.1.0 to 10.1.1, 10.0.0 to 10.0.3

References

  • https://confluence.atlassian.com/pages/viewpage.action?pageId=1821999768
  • https://jira.atlassian.com/browse/BAM-26468

Related News (1 articles)

Tier C
VulDB5d ago
CVE-2026-21584 | Atlassian Bamboo Data Center up to 10.2.21/12.1.9 improper authorization
→ No new info (linked only)
CISA KEV❌ No
Actively exploited❌ No
Patch available
12.1.1010.2.22
PublishedAug 18, 2026
Trending Score13
Source articles1
Independent1
Info Completeness0/14
Missing: cve_id, title, description, vendor, product, versions, cvss, epss, cwe, kev, exploit, patch, iocs, mitre_attack

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Related CVEs (5)

NONECVE-2026-21582
CVE-2026-21582: This High severity BASM (Broken Authentication & Session Management) vulnerability known as CVE-2026-21582 was introduce
Trending: 20
NONECVE-2026-21580
CVE-2026-21580: This Critical severity Stored XSS, PrivEsc (Privilege Escalation), and Security Misconfiguration vulnerability was intro
Trending: 18
NONECVE-2026-21579
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,
Trending: 2
NONECVE-2026-21577
CVE-2026-21577: This High severity DoS (Denial of Service) vulnerability was introduced in versions 9.0.1, 9.1.0, 9.2.0, 9.3.1, 9.4.0, 9
Trending: 2
CRITICALPRE-CVE
Multiple Critical Vulnerabilities in Atlassian Products
Trending: 1

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Verification

State: unverified
Confidence: 0%

Vulnerability Timeline

CVE Published
Aug 18, 2026
Discovered by ZDM
Aug 18, 2026
Patch Available
Aug 20, 2026