Atlassian Jira/Confluence/Bitbucket - Pre-Auth Arbitrary File Read

Atlassian products including Jira, Confluence, and Bitbucket Data Center contain a pre-authentication arbitrary file read vulnerability in the shared atlassian-plugins-webresource library. The library improperly handles double colons :: as path separators in the resource routing, allowing...

CVE-2026-21589: Critical Pre-Authentication File Read Affects Atlassian Data Center Products

Atlassian has released an out-of-band security advisory for CVE-2026-21589, a critical arbitrary file access vulnerability affecting a broad range of its Data Center products. The flaw carries a CVSS 4.0 score of 9.3 and can be exploited remotely without authentication or user interaction. Becaus...

Exploit for CVE-2026-21589

CVE-2026-21589 — Atlassian pre-auth arbitrary file read Pytho...

Exploit for CVE-2026-21589

CVE-2026-21589 Atlassian DC Pre-Auth Arbitrary File Read,...

Exploit for CVE-2026-21589

CVE-2026-21589 — Atlassian Pre-Auth Arbitrary File Read → Crow...