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Threat Intelligence Report

You Won’t Hear About These, Even In Myths (Atlassian Jira, Confluence (and more) Pre-Auth Arbitrary File Read CVE-2026-21589)

📅 October 6, 2026 📰 labs.watchtowr.com 🔍 1 CVE(s) referenced

CVE-2026-21589 is a critical unauthenticated path-traversal flaw affecting virtually all older on-prem Atlassian products, enabling arbitrary application-file reads that can expose Crowd credentials and let attackers create administrator accounts.

unclassified
CVE-2026-21589

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