CVE-2026-21589
Atlassian Multiple Products Files or Directories Accessible to External Parties Vulnerability
9.3
CVSS 4.0
2.8 %
EPSS (current)
2026-10-15
KEV addition
No
Ransomware
Timeline
Publication, first public exploit and KEV addition on a day axis.
Key facts
Vendor / product: Atlassian / Multiple Products
Published: 2026-10-05 · Due (CISA): 2026-10-18
CWE: CWE-552 · EU list: no
Exploit references (metadata only)
| Source | Reference | Title | Date |
|---|---|---|---|
| nuclei | http/cves/2026/CVE-2026-21589.yaml | Atlassian Jira/Confluence/Bitbucket - Pre-Auth Arbitrary File Read | – |
References only — no downloads or instructions.