--- title: "CVE-2026-21589: Atlassian Bamboo Data Center vulnerability | CubePath" description: "This is a vulnerability in Bitbucket Data Center, Confluence Data Center, Jira Service Management Data Center, Jira Software Data Center, Bamboo Data…" language: en source: https://cubepath.com/security/cve/CVE-2026-21589 --- # CVE-2026-21589: Atlassian Bamboo Data Center vulnerability | CubePath ## Description This is a vulnerability in Bitbucket Data Center, Confluence Data Center, Jira Service Management Data Center, Jira Software Data Center, Bamboo Data Center. Crowd Data Center, Crucible and Fisheye. This Arbitrary File Access vulnerability allows an unauthenticated attacker to access specific files within the web application root directory in affected versions. Exploitation requires prior knowledge of the target file's exact name and path; this vulnerability does not allow attackers to enumerate or list directory contents. In some configurations, there may be some sensitive files that make this highly severe. This vulnerability allows an unauthenticated remote attacker to access specific files within the web application root directory in affected versions. The vulnerability must be addressed for affected versions of: -- Bitbucket Data Center, introduced in version >= 4.6.0, fix versions: 9.4.26, 10.2.8, 10.5.1 -- Confluence Data Center, introduced in version >= 5.10.0, fix versions 9.2.26, 10.2.19 -- Crowd Data Center, introduced in version >= 2.11.0, fix versions 6.3.7, 7.0.3, 7.1.7, 7.2.4 -- Jira Software Data Center, introduced in version >= 7.1.0, fix versions 9.12.40, 10.3.26, 11.3.12 -- Jira Service Management Data Center, introduced in version >= 3.1.0, fix versions 5.12.40, 10.3.26, 11.3.12 -- Bamboo Data Center >= 7.0.1, fix versions 10.2.24, 12.1.12 -- Crucible, fix versions 4.9.15 -- Fisheye, fix version 4.9.15 -- Exploitation requires prior knowledge of the target file's exact name and path. The vulnerability does not include the capability to enumerate or list directory contents. Official description from the CVE record, published by atlassian. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-21589) ## Key data ### CVSS 4.0 Critical 9.3 Score published by atlassian in the CVE record. CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H | Metric | Value | What it means | | ----------------------------------- | ------- | --------------------------------------------------------------------------------------------------------------- | | Attack vector | Network | The vulnerable component can be reached over a network, possibly from the Internet. | | Attack complexity | Low | No measurable action is needed to get around the system's built-in security controls. The attack is repeatable. | | Attack requirements | None | The attack works without any special deployment or execution conditions. | | Privileges required | None | No account or privileges are needed. | | User interaction | None | No action from any user is needed. | | Vulnerable system: confidentiality | High | Serious or total effect on the secrecy of data. | | Vulnerable system: integrity | None | No effect on the trustworthiness of data. | | Vulnerable system: availability | None | No effect on availability. | | Subsequent systems: confidentiality | High | Serious or total effect on other systems' data secrecy. | | Subsequent systems: integrity | High | Serious or total effect on other systems' data trustworthiness. | | Subsequent systems: availability | High | Serious or total effect on other systems' availability. | CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) . ### EPSS Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days. Score 0.99664 (99.7% probability) Percentile 99.9% Scores of Nov 10, 2026 Model v2026.06.15 ### CISA Known Exploited Vulnerabilities This CVE is listed in the CISA KEV catalog. Name in the catalog Atlassian Multiple Products Files or Directories Accessible to External Parties Vulnerability Added to the catalog Oct 15, 2026 Federal due date Oct 18, 2026 ### CISA assessment as of Oct 16, 2026 Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA. Exploitation Recorded by CISA as active Automatable no Technical impact total ### Weakness (CWE) CWE catalog version 5.0. CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license. - [CWE-552](https://cwe.mitre.org/data/definitions/552.html) Files or Directories Accessible to External Parties ## Affected products Products listed in the CVE record, as the CNA published them. - Atlassian Bamboo Data Center - affected: All other versions - unaffected: Patch version 10.2.24 and later - unaffected: Patch version 12.1.12 and later - Atlassian Bitbucket Data Center - affected: All other versions - unaffected: Patch version 10.2.8 and later - unaffected: Patch version 10.5.1 and later - unaffected: Patch version 9.4.26 and later - Atlassian Confluence Data Center - affected: All other versions - unaffected: Patch version 10.2.19 and later - unaffected: Patch version 9.2.26 and later - Atlassian Crowd Data Center - affected: All other versions - unaffected: Patch version 7.2.4 and later - unaffected: Patch version 7.1.7 and later - unaffected: Patch version 7.0.3 and later - unaffected: Patch version 6.3.7 and later - Atlassian Crucible Data Center - affected: All other versions - unaffected: Patch version 4.9.15 and later - Atlassian Fisheye Data Center - affected: All other versions - unaffected: Patch version 4.9.15 and later - Atlassian Jira Service Management Data Center - affected: All other versions - unaffected: Patch version 11.3.12 and later - unaffected: Patch version 10.3.26 and later - unaffected: Patch version 5.12.40 and later - Atlassian Jira Software Data Center - affected: All other versions - unaffected: Patch version 11.3.12 and later - unaffected: Patch version 10.3.26 and later - unaffected: Patch version 9.12.40 and later ## References Links listed in the CVE record. They lead to other sites, which CubePath does not control. - [jira.atlassian.com/browse/BAM-26567](https://jira.atlassian.com/browse/BAM-26567) - [jira.atlassian.com/browse/BSERV-20604](https://jira.atlassian.com/browse/BSERV-20604) - [jira.atlassian.com/browse/CONFSERVER-104488](https://jira.atlassian.com/browse/CONFSERVER-104488) - [jira.atlassian.com/browse/CRUC-8741](https://jira.atlassian.com/browse/CRUC-8741) - [jira.atlassian.com/browse/CWD-6610](https://jira.atlassian.com/browse/CWD-6610) - [jira.atlassian.com/browse/FE-7583](https://jira.atlassian.com/browse/FE-7583) - [jira.atlassian.com/browse/JRASERVER-79546](https://jira.atlassian.com/browse/JRASERVER-79546) - [jira.atlassian.com/browse/JSDSERVER-16809](https://jira.atlassian.com/browse/JSDSERVER-16809) ## Timeline 1. ID reserved Jan 1, 2026 2. Record published Oct 5, 2026 3. Added to CISA KEV Oct 15, 2026 4. Record last updated Oct 29, 2026 ## Look up another CVE ## About CubePath CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection. [Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection) Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:51 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)