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CVE-2026-21584

Quick assessment

Affected
Atlassian Bamboo Data Center
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Atlassian Bamboo Data Center是澳大利亚Atlassian公司的一款持续集成与部署服务器。 Atlassian Bamboo Data Center 10.0.0版本至10.0.3版本、10.1.0版本至10.1.1版本、10.2.0版本至10.2.21版本、11.0.0版本至11.0.8版本、12.0.0版本至12.0.2版本和12.1.0版本至12.1.9版本存在安全漏洞，该漏洞源于授权不当，可能导致经过身份验证的攻击者获得非预期访问权限，造成资源或功能暴露，甚至可能获取敏感

CVSS 7.6 · High EPSS 0.31% · P22

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts

Affected Version Matrix 8

VendorProduct Version RangeStatus
Atlassian Bamboo Data Center 12.1.0 to 12.1.9 affected
12.0.0 to 12.0.2 affected
11.0.0 to 11.0.8 affected
10.2.0 to 10.2.21 affected
10.1.0 to 10.1.1 affected
10.0.0 to 10.0.3 affected
12.1.10 unaffected
10.2.22 unaffected
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I. Basic Information for CVE-2026-21584

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Atlassian Bamboo Data Center 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Atlassian Bamboo Data Center是澳大利亚Atlassian公司的一款持续集成与部署服务器。 Atlassian Bamboo Data Center 10.0.0版本至10.0.3版本、10.1.0版本至10.1.1版本、10.2.0版本至10.2.21版本、11.0.0版本至11.0.8版本、12.0.0版本至12.0.2版本和12.1.0版本至12.1.9版本存在安全漏洞，该漏洞源于授权不当，可能导致经过身份验证的攻击者获得非预期访问权限，造成资源或功能暴露，甚至可能获取敏感
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Atlassian Bamboo Data Center 12.1.0 to 12.1.9 -

II. Public POCs for CVE-2026-21584

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III. Intelligence Information for CVE-2026-21584

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Vendor Advisories for CVE-2026-21584 (2)

Same Patch Batch · Atlassian · 2026-08-18 · 3 CVEs total

CVE-2026-21582 8.8 HIGH Atlassian Crowd Data Center 安全漏洞
CVE-2026-21580 8.6 HIGH Atlassian Confluence Data Center 安全漏洞

IV. Related Vulnerabilities

Same product: Bamboo Data Center
Same vendor: Atlassian

V. Comments for CVE-2026-21584

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