Atlassian · Multiple Products
CVE-2026-21589
Atlassian Multiple Products Files or Directories Accessible to External Parties Vulnerability
Qué es
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.
CISA: Multiple Atlassian products (Bitbucket Data Center ,Confluence Data Center, Jira Service Management Data Center, Jira Software Data Center, Bamboo Data Center, Crowd Data Center, Crucible and Fisheye) contain a files or directories accessible to external parties vulnerability which could allow an unauthenticated attacker to access specific files within the web application root directory in affected versions.
Qué hacer
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Plazo para las agencias federales de EE. UU.: 18 de octubre de 2026
- Añadida a la lista de CISA
- 15 de octubre de 2026
- Publicada
- 5 de octubre de 2026
- Gravedad
- Crítica 9,3 CVSS 4.0
- Probabilidad de ataques en los próximos 30 días (EPSS)
- 99,5% entre el 0,1% superior de todas las vulnerabilidades conocidas
- Debilidad
- CWE-552
- Más detalles
- NVD · CVE.org · CISA
Todas las referencias (8)
- https://jira.atlassian.com/browse/BAM-26567
- https://jira.atlassian.com/browse/BSERV-20604
- https://jira.atlassian.com/browse/CONFSERVER-104488
- https://jira.atlassian.com/browse/CRUC-8741
- https://jira.atlassian.com/browse/CWD-6610
- https://jira.atlassian.com/browse/FE-7583
- https://jira.atlassian.com/browse/JRASERVER-79546
- https://jira.atlassian.com/browse/JSDSERVER-16809
Más fallos explotados de Atlassian
| Añadido | Vulnerabilidad | Producto | Gravedad | Prob. de ataque |
|---|---|---|---|---|
| 12 nov 2024 | Path Traversal | Jira Server and Data Center | Media 5,3 | >99,9% |
| 24 ene 2024 | Template Injection | Confluence Data Center and Server | Crítica 10,0 | >99,9% |
| 7 nov 2023 | Improper Authorization | Confluence Data Center and Server | Crítica 10,0 | >99,9% |
| 5 oct 2023 | Broken Access Control | Confluence Data Center and Server | Crítica 10,0 | 99,2% |
| 30 sept 2022 | Command Injection | Bitbucket Server and Data Center | Alto 8,8 | 99,1% |
| 29 jul 2022 | Questions For Confluence App Hard-coded Credentials | Confluence | Crítica 9,8 | 98% |
| 2 jun 2022 | Confluence Server and Data Center Remote Code Execution | Confluence Server/Data Center | Crítica 9,8 | >99,9% |
| 28 mar 2022 | Pre-Authorization Arbitrary File Read | Confluence Server | Media 5,3 | 99,9% |
Fuentes: Known Exploited Vulnerabilities (CISA, dominio público), CVE records (cve.org) y EPSS (FIRST). La probabilidad de ataque es la estimación EPSS de que alguien intente explotar el fallo en los próximos 30 días.