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CVE-2026-21589 Critique

Atlassian Multiple Products Files or Directories Accessible to External Parties Vulnerability.

Atlassian · Multiple Products

Exploitabilité (EPSS)
99.5 %
percentile mondial 100
Sévérité (CVSS)
9.3
CVSS v4.0
Ajoutée au KEV
15 oct. 2026
échéance CISA · 18 oct. 2026
Description

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.

Action requise (CISA)

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.

Familles de faiblesses
CWE-552 · CWE-552
Signal de priorisation (d’inspiration SSVC)
Examiner rapidement
Exploitation
Active (catalogue KEV)
Automatisable
Oui
Impact technique
Partiel

Une orientation, pas une décision : le 4ᵉ facteur SSVC (impact mission/société) dépend du contexte de votre organisation. Méthode ↗

Autres vulnérabilités exploitées · Atlassian
CVE-2021-26086 100% CVE-2023-22518 100% CVE-2022-26134 100% CVE-2021-26084 100% CVE-2023-22527 100% CVE-2021-26085 100%
NVD ↗ CVE.org ↗ CISA KEV ↗