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CVE-2026-21570

HIGH CVSS 4.0: 8.6 EPSS 0.58%
Updated Mar 18, 2026
Atlassian
Parameter Value
CVSS 8.6 (HIGH)
Affected Versions 9.6.1 — 9.6.23
Type CWE-94 (Code Injection)
Vendor Atlassian
Public PoC No

This High severity RCE (Remote Code Execution)  vulnerability was introduced in versions 9.6.0, 10.0.0, 10.1.0, 10.2.0, 11.0.0, 11.1.0, 12.0.0, and 12.1.0 of Bamboo Data Center. This RCE (Remote Code Execution) vulnerability, with a CVSS Score of 8.6, allows an authenticated attacker to execute malicious code on the remote system. 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 9.6: Upgrade to a release greater than or equal to 9.6.24 Bamboo Data Center 10.2: Upgrade to a release greater than or equal to 10.2.16 Bamboo Data Center 12.1: Upgrade to a release greater than or equal to 12.1.3 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 Atlassian (Internal) program.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
High
Admin privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v4.0

Weakness Type (CWE)

Vulnerable Products 20

Configuration From (including) Up to (excluding)
Atlassian Bamboo
cpe:2.3:a:atlassian:bamboo:*:*:*:*:data_center:*:*:*
9.6.1 <= 9.6.23
Atlassian Bamboo
cpe:2.3:a:atlassian:bamboo:9.6.6:*:*:*:data_center:*:*:*
Atlassian Bamboo
cpe:2.3:a:atlassian:bamboo:9.6.7:*:*:*:data_center:*:*:*
Atlassian Bamboo
cpe:2.3:a:atlassian:bamboo:9.6.8:*:*:*:data_center:*:*:*
Atlassian Bamboo
cpe:2.3:a:atlassian:bamboo:9.6.9:*:*:*:data_center:*:*:*
Atlassian Bamboo
cpe:2.3:a:atlassian:bamboo:9.6.10:*:*:*:data_center:*:*:*
Atlassian Bamboo
cpe:2.3:a:atlassian:bamboo:9.6.11:*:*:*:data_center:*:*:*
Atlassian Bamboo
cpe:2.3:a:atlassian:bamboo:9.6.12:*:*:*:data_center:*:*:*
Atlassian Bamboo
cpe:2.3:a:atlassian:bamboo:9.6.13:*:*:*:data_center:*:*:*
Atlassian Bamboo
cpe:2.3:a:atlassian:bamboo:9.6.14:*:*:*:data_center:*:*:*
Atlassian Bamboo
cpe:2.3:a:atlassian:bamboo:9.6.15:*:*:*:data_center:*:*:*
Atlassian Bamboo
cpe:2.3:a:atlassian:bamboo:9.6.16:*:*:*:data_center:*:*:*
Atlassian Bamboo
cpe:2.3:a:atlassian:bamboo:9.6.17:*:*:*:data_center:*:*:*
Atlassian Bamboo
cpe:2.3:a:atlassian:bamboo:9.6.18:*:*:*:data_center:*:*:*
Atlassian Bamboo
cpe:2.3:a:atlassian:bamboo:9.6.19:*:*:*:data_center:*:*:*
Atlassian Bamboo
cpe:2.3:a:atlassian:bamboo:9.6.20:*:*:*:data_center:*:*:*
Atlassian Bamboo
cpe:2.3:a:atlassian:bamboo:9.6.21:*:*:*:data_center:*:*:*
Atlassian Bamboo
cpe:2.3:a:atlassian:bamboo:9.6.22:*:*:*:data_center:*:*:*
Atlassian Bamboo
cpe:2.3:a:atlassian:bamboo:9.6.23:*:*:*:data_center:*:*:*
Atlassian Bamboo
cpe:2.3:a:atlassian:bamboo:9.6.24:*:*:*:data_center:*:*:*