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Atlassian Data Center
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- 1Critical Atlassian flaw lets attackers read files unauthenticatedโ๐ค CVE-2026-21589 (critical): unauthenticated arbitrary file access in self-hosted Atlassian Data Center โ Jira, Confluen
Security researchers are flagging CVE-2026-21589, a critical vulnerability in self-hosted Atlassian Data Center products including Jira, Confluence, Bitbucket, Bamboo and Crowd. The flaw allows unauthenticated attackers to access arbitrary files, though they must know the exact file name or path since directory listing is not possible. Atlassian has released patched versions and reports no known exploitation so far. Administrators are urged to update their deployments promptly.
- 2Critical file-access flaw hits self-hosted Atlassian productsโ๐ค 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.
- 3Atlassian products hit by critical vulnerability scoring 9.3โผ๐จ EUVD-2026-92807 ๐ Score: 9.3/10 (CVSS v3.1) ๐ฆ Product: Bitbucket Data Center, Crowd Server, Crucible Data Center (+13
Atlassian has a critical vulnerability, tracked as EUVD-2026-92807, affecting a range of its enterprise products including Bitbucket Data Center, Crowd Server, Crucible Data Center, Confluence Data Center and Jira Service Management. The flaw carries a CVSS v3.1 severity score of 9.3 out of 10, putting it in the critical range. The advisory was updated on 5 October 2026, and security teams are being urged to check whether their deployments of the affected Atlassian products are exposed.
- 4Critical Atlassian vulnerability CVE-2026-21589 exposes self-hosted productsโ๐ค CVE-2026-21589 (CVSS 9.3): unauthenticated file read in 8 self-hosted Atlassian Data Center products (Bitbucket, Confl
A critical vulnerability, CVE-2026-21589 with a CVSS score of 9.3, allows unauthenticated file reads in eight self-hosted Atlassian Data Center products, including Bitbucket, Confluence and Jira. Attackers must know a file's exact name or path, as there is no directory listing. Fixed versions have been released, and security experts urge administrators to restrict public access until they upgrade.
- 5Critical Atlassian Vulnerability Exposes Data Center Products to File DisclosureโCritical CVE-2026-21589 Vulnerability Exposes Atlassian Data Center Products to Unauthenticated File Disclosure
A critical vulnerability, tracked as CVE-2026-21589, has been reported in Atlassian Data Center products. The flaw reportedly allows unauthenticated attackers to disclose sensitive files from affected systems without needing credentials. Atlassian customers running Data Center deployments are being urged to review the flaw, assess exposure, and apply patches or mitigations as they become available.
- 6Critical path traversal flaw hits Atlassian Bamboo Data CenterโCVE-2026-21589 (CRITICAL, CVSS 9.3) in Atlassian Bamboo Data Center https:// radar.offseq.com/threat/cve-20 26-21589-pat
A new vulnerability, CVE-2026-21589, has been assigned a critical CVSS score of 9.3 in Atlassian Bamboo Data Center. The flaw is described as a path traversal issue allowing arbitrary read and write access on affected systems. Security teams running Bamboo deployments are being urged to review the advisory and patch promptly, as unpatched instances could allow attackers to read or modify files on the server.