{"cve":"CVE-2026-21571","nvd":{"published":"2026-04-21T17:16:22.950","modified":"2026-10-26T22:10:00.163","status":"Analyzed","description":"This Critical severity OS Command Injection vulnerability was introduced in versions 9.6.0, 10.0.0, 10.1.0, 10.2.0,\r\n11.0.0, 11.1.0, 12.0.0, and 12.1.0 of Bamboo Data Center.\r\n \r\nThis RCE (Remote Code Execution) vulnerability, with a CVSS Score of 9.4 and a CVSS Vector of\r\nCVSS: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\r\non the remote system, which has high impact to confidentiality, high impact to integrity, high impact to availability,\r\nand requires no user interaction.\r\n \r\nAtlassian recommends that Bamboo Data Center customers upgrade to latest version, if you are unable to do so, upgrade\r\nyour instance to one of the specified supported fixed versions:\r\n Bamboo Data Center 9.6.0: Upgrade to a release greater than or equal to 9.6.25\r\n Bamboo Data Center 10.2: Upgrade to a release greater than or equal to 10.2.18 \r\n Bamboo Data Center 12.1: Upgrade to a release greater than or equal to 12.1.6\r\n\r\nSee 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]).","cvss_v4":{"vector":"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","score":9.4},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-78"],"references":["https://confluence.atlassian.com/pages/viewpage.action?pageId=1770913890","https://jira.atlassian.com/browse/BAM-26364"],"products":["atlassian:bamboo"],"source":"nvd","synced_at":"2026-10-26T22:26:44.656832877+00:00"},"epss":{"cve":"CVE-2026-21571","score":0.01345,"percentile":0.71207,"date":"2026-10-26"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}