Mmastodon TechnologyCybersecurity first seen 8 h ago, last 8 h ago, peak #10
Critical file-access flaw hits self-hosted Atlassian products
Original: 🤖 CVE-2026-21589: critical arbitrary file-access flaw in self-hosted Atlassian Data Center products (Confluence, Jira, B
Atlassian has disclosed CVE-2026-21589, a critical arbitrary file-access vulnerability affecting self-hosted Data Center versions of Confluence, Jira and Bitbucket. The flaw could let attackers read sensitive files on affected servers. Atlassian is urging administrators to patch immediately. Security commentators are sharing the advisory and warning self-hosted deployments to act quickly.
Why now: A newly disclosed critical vulnerability in widely used Atlassian products is driving urgent patching warnings across the security community.
AtlassianConfluenceJiraBitbucketCVE-2026-21589
Evidence
- 🤖 CVE-2026-21589: critical arbitrary file-access flaw in self-hosted Atlassian Data Center products (Confluence, Jira, Bitbucket). Atlassian advises immediate patching. 🔗 https://www. bleepingcomputer.com/news/secu… · cloud@infosec.exchange · 2
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