Bamboo Data Center vulnerability

This is a vulnerability in Bitbucket Data Center, Confluence Data Center, Jira Service Management Data Center, Jira Software Data Center, Bamboo Data Center. Crowd Data Center, Crucible and Fisheye. This Arbitrary File Access vulnerability allows an unauthenticated attacker to access specific files within the web application root directory in affected versions. Exploitation requires prior knowledge of the target file's exact name and path; this vulnerability does not allow attackers to enumerate or list directory contents. In some configurations, there may be some sensitive files that make this highly severe. This vulnerability allows an unauthenticated remote attacker to access specific files within the web application root directory in affected versions. The vulnerability must be addressed for affected versions of: -- Bitbucket Data Center, introduced in version >= 4.6.0, fix versions: 9.4.26, 10.2.8, 10.5.1 -- Confluence Data Center, introduced in version >= 5.10.0, fix versions 9.2.26, 10.2.19 -- Crowd Data Center, introduced in version >= 2.11.0, fix versions 6.3.7, 7.0.3, 7.1.7, 7.2.4 -- Jira Software Data Center, introduced in version >= 7.1.0, fix versions 9.12.40, 10.3.26, 11.3.12 -- Jira Service Management Data Center, introduced in version >= 3.1.0, fix versions 5.12.40, 10.3.26, 11.3.12 -- Bamboo Data Center >= 7.0.1, fix versions 10.2.24, 12.1.12 -- Crucible, fix versions 4.9.15 -- Fisheye, fix version 4.9.15 -- Exploitation requires prior knowledge of the target file's exact name and path. The vulnerability does not include the capability to enumerate or list directory contents.

Published 5 Oct 2026Updated 16 Oct 2026243 sources
CVSS 9.3 ✓ VERIFIED REFERENCE△ CISA KEV

What happened

This is a vulnerability in Bitbucket Data Center, Confluence Data Center, Jira Service Management Data Center, Jira Software Data Center, Bamboo Data Center. Crowd Data Center, Crucible and Fisheye. This Arbitrary File Access vulnerability allows an unauthenticated attacker to access specific files within the web application root directory in affected versions. Exploitation requires prior knowledge of the target file's exact name and path; this vulnerability does not allow attackers to enumerate or list directory contents. In some configurations, there may be some sensitive files that make this highly severe. This vulnerability allows an unauthenticated remote attacker to access specific files within the web application root directory in affected versions. The vulnerability must be addressed for affected versions of: -- Bitbucket Data Center, introduced in version >= 4.6.0, fix versions: 9.4.26, 10.2.8, 10.5.1 -- Confluence Data Center, introduced in version >= 5.10.0, fix versions 9.2.26, 10.2.19 -- Crowd Data Center, introduced in version >= 2.11.0, fix versions 6.3.7, 7.0.3, 7.1.7, 7.2.4 -- Jira Software Data Center, introduced in version >= 7.1.0, fix versions 9.12.40, 10.3.26, 11.3.12 -- Jira Service Management Data Center, introduced in version >= 3.1.0, fix versions 5.12.40, 10.3.26, 11.3.12 -- Bamboo Data Center >= 7.0.1, fix versions 10.2.24, 12.1.12 -- Crucible, fix versions 4.9.15 -- Fisheye, fix version 4.9.15 -- Exploitation requires prior knowledge of the target file's exact name and path. The vulnerability does not include the capability to enumerate or list directory contents.

Affected versions

Bamboo Data Center: All other versions Fixed: See vendor advisory.

Why it matters

Review the vendor advisory and exposure of the affected product to determine operational impact.

Detection & mitigation

  • Apply vendor-provided updates or mitigations.
  • Review affected product exposure and access logs.

Public PoC references

RepositoryAuthorFirst seenReference
SploitusUnauthenticated arbitrary file read in Atlassian Data Center products via path traversal.tc4dy2026-10-06T18:34:46VerifiedPoC-in-GitHub · tc4dy/CVE-2026-21589-PoC-ExploitCVE-2026-21589 - Atlassian Data Center Unauth Arbitrary File Read (CVSS 9.3). Red/Blue Team suite with 2 tools: Full Exploit (path traversal, WEB-INF read, interactive shell, 8 products, mass scan, SOCKS5/Tor, stealth) and SafeChecker (non-intrusive version audit, WAF detection, IoC guidance, JSON/CSV/JSONL reports). Use Ethically, Stay Legal.★ 10tc4dy2026-10-06CandidateSploitusArbitrary file read in Atlassian Jira, Confluence, and Bitbucket.BimBoxH42026-10-07T13:46:04VerifiedSploitusUnauthenticated arbitrary file read in atlassian-plugins-webresource enabling admin takeover.aduli1982026-10-07T09:12:37VerifiedPoC-in-GitHub · BimBoxH4/CVE-2026-21589★ 0BimBoxH42026-10-07CandidatePoC-in-GitHub · aduli198/CVE-2026-21589Atlassian Arbitrary File Read★ 0aduli1982026-10-07CandidateSploitusUnauthenticated arbitrary file read in Atlassian products via atlassian-plugins-webresource.murrez2026-10-08T08:31:53VerifiedPoC-in-GitHub · murrez/CVE-2026-21589CVE-2026-21589 — Atlassian DC pre-auth arbitrary file read (CVSS 4.0 9.3). PoCbit PoC: atlassian-plugins-webresource ..:: traversal on /download/resources/ for Jira, Confluence, Bitbucket. check + exploit (WEB-INF/web.xml, crowd.properties). Batch JSONL, hits.txt. Not RCE. https://pocbit.org/pocs/cve-2026-21589★ 1murrez2026-10-08CandidateSploitusUnauthenticated path traversal in Atlassian products allows remote arbitrary file read.gotr00t0day2026-10-09T19:17:31VerifiedPoC-in-GitHub · gotr00t0day/CVE-2026-21589Atlassian Arbitrary File Read★ 1gotr00t0day2026-10-09CandidatePoC-in-GitHub · watchtowrlabs/watchTowr-vs-Atlassian-CVE-2026-21589★ 15watchtowrlabs2026-10-06CandidatePoC-in-GitHub · MarcusProgram/CVE-2026-21589★ 10MarcusProgram2026-10-06CandidatePoC-in-GitHub · 0xBlackash/CVE-2026-21589CVE-2026-21589★ 00xBlackash2026-10-07CandidatePoC-in-GitHub · ynsmroztas/AtlasSniperCVE-2026-21589 detector for Atlassian Data Center webresource traversal. Pre-auth webroot file read confirm for Jira, Confluence and Bitbucket.★ 8ynsmroztas2026-10-07CandidatePoC-in-GitHub · rxsklife/CVE-2026-21589CVE-2026-21589 is a critical (CVSS 9.3) arbitrary file access vulnerability affecting all versions of eight Atlassian Data Center products, including Jira, Confluence, Bitbucket, Bamboo, Crowd, Crucible, Fisheye, and Jira Service Management.★ 0rxsklife2026-10-08CandidatePoC-in-GitHub · renzi25031469/CVE-2026-21589Atlassian Data Center Multiple Products - Arbitrary File Access (Path Traversal)★ 0renzi250314692026-10-08CandidatePoC-in-GitHub · webserverdude/f5_CVE-2026-21589_mitigation★ 0webserverdude2026-10-10Candidate