CVE-2026-21570 Code injection in Bamboo Data Center
An authenticated attacker can execute malicious code on the remote system via a code injection vulnerability in Atlassian Bamboo Data Center.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-21570?
CVE-2026-21570 is a high-severity code injection vulnerability in Atlassian Bamboo Data Center, published on 17 Mar 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
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.
Weakness: CWE-94
Which versions are affected by CVE-2026-21570?
It affects 1 product.
Products include Atlassian Bamboo.
How do I fix CVE-2026-21570?
No fix has been published for CVE-2026-21570 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-21570 being exploited?
There is no known exploitation of CVE-2026-21570 in the wild and no public exploit code.
Other vulnerabilities in Atlassian Bamboo Data Center
Sources
Also known as GHSA-c7mx-5c2c-78hh.