October 6, 2026

CVE Watchtower

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CVE-2026-21571NVD

Vulnerability Summary

This Critical severity OS Command Injection 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 9.4 and a CVSS Vector of
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H allows an authenticated attacker to execute commands
on the remote system, which has high impact to confidentiality, high impact to integrity, high impact to availability,
and requires no user interaction.
 
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 9.6.0: Upgrade to a release greater than or equal to 9.6.25
Bamboo Data Center 10.2: Upgrade to a release greater than or equal to 10.2.18 
Bamboo Data Center 12.1: Upgrade to a release greater than or equal to 12.1.6

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]).
Severity Level
UNKNOWN
Published Date
Apr 21, 2026
Last Modified
Apr 21, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
1.17%Probability
Root Weakness (CWE)
N/A
CVSS v4.0 Base Metrics — Score 9.4 (CRITICAL)
Attack VectorNetwork
Attack ComplexityLow
Attack RequirementsNone
Privileges RequiredLow
User InteractionNone
Confidentiality (Vulnerable System)High
Integrity (Vulnerable System)High
Availability (Vulnerable System)High
Confidentiality (Subsequent System)High
Integrity (Subsequent System)High
Availability (Subsequent System)High

Affected & Patched Versions

Affected Versions
  • Atlassian Bamboo Data Center >= 12.1.0 to 12.1.3
  • Atlassian Bamboo Data Center >= 12.0.0 to 12.0.2
  • Atlassian Bamboo Data Center >= 11.0.0 to 11.0.8
  • Atlassian Bamboo Data Center >= 10.2.0 to 10.2.16
  • Atlassian Bamboo Data Center >= 10.1.0 to 10.1.1
  • Atlassian Bamboo Data Center >= 10.0.0 to 10.0.3
  • Atlassian Bamboo Data Center >= 9.6.2 to 9.6.24
Patched Versions
Not provided by cveorg for this CVE.
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🔀Smart Routing — Critical alerts to one channel, rest to another.
🚫Ad-Free — Uninterrupted experience.
🎁7-Day Free Trial — Try Pro or Team, no card required.
📧Email Delivery — Threat intel straight to your inbox.
♾️Unlimited Vendors — Track your entire stack.
🚨All New CVEs — Be the first to know.
📈EPSS Spike Alerts — Catch rising risk before it peaks.
🎯Custom EPSS/CVSS — Filter noise, focus on risk.
🛡️Exploit Intel — A 2nd confirmed-exploit signal beyond KEV.
🐙GitHub Issues — Auto-tracked, no duplicates.
📬Weekly Digest — One clean summary, not inbox spam.
🏷️Watchlist Groups — Tag alerts by team (Infra/AppSec/SOC).
💬Webhooks — Slack & Teams integration.
🔀Smart Routing — Critical alerts to one channel, rest to another.
🚫Ad-Free — Uninterrupted experience.

External References