Zero Day MonitorZDM
DashboardVulnerabilitiesTrendingZero-DaysNewsAbout
Login
ImpressumPrivacy Policy
Zero Day Monitor © 2026
8235 articles · 242019 vulns · 35/41 feeds (7d)
← Back to list
—
CVE-2026-21589PATCHED
atlassian · bitbucket_data_center

CVE-2026-21589: This is a vulnerability in Bitbucket Data Center, Confluence Data Center, Jira Service Management Data Center, Jira Soft

Description

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 Products

VendorProductVersions
atlassianbitbucket_data_centerAll other versions, All other versions, All other versions, All other versions, All other versions, All other versions, All other versions, All other versions

Also Affects

Downstream vendors/products affected by this vulnerability

VendorProductSourceConfidence
atlassianconfluence_data_centercve_cpe95%
atlassiancrowdcve_cpe95%
atlassianbitbucket_servercve_cpe95%
atlassianjira_service_managementcve_cpe95%
atlassianjira_data_centercve_cpe95%

References

  • https://jira.atlassian.com/browse/BAM-26567
  • https://jira.atlassian.com/browse/BSERV-20604
  • https://jira.atlassian.com/browse/CONFSERVER-104488
  • https://jira.atlassian.com/browse/CRUC-8741
  • https://jira.atlassian.com/browse/CWD-6610
  • https://jira.atlassian.com/browse/FE-7583
  • https://jira.atlassian.com/browse/JRASERVER-79546
  • https://jira.atlassian.com/browse/JSDSERVER-16809
  • https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-21589.yaml(exploit, nuclei)

Related News (25 articles)

Tier D
Heise Security3h ago
Sicherheitslücken in Fortinet-Produkten und BeyondTrust werden attackiert
→ No new info (linked only)
Tier D
CSO Online5d ago
October Patch Tuesday roundup: Over 1,400 Microsoft holes to be plugged, including three zero days
→ No new info (linked only)
Tier D
The Hacker News6d ago
⚡ Weekly Recap: Helpdesk 0-Days, Rogue Certs, ShinyHunters Arrest, AI-Fooling Malware and More
→ No new info (linked only)
Tier B
CERT-FR7d ago
Bulletin d'actualité CERTFR-2026-ACT-043 (12 octobre 2026)
→ No new info (linked only)
Tier D
Help Net Security8d ago
Week in review: FortiBleed is still active, Patch Tuesday forecast
→ No new info (linked only)
Tier D
SecurityWeek10d ago
Attackers Target Critical Atlassian Vulnerability Within Hours of PoC Publication
→ No new info (linked only)
Tier E
Hacker News10d ago
Atlassian Jira, Confluence Pre-Auth Arbitrary File Read (CVE-2026-21589)
→ No new info (linked only)
Tier D
Infosecurity Magazine11d ago
Critical Flaw in Multiple Atlassian Products Exploited in the Wild
→ No new info (linked only)
Tier D
Heise Security11d ago
Angriffe auf Atlassian-Data-Center-Lücke haben begonnen
→ No new info (linked only)
Tier D
Help Net Security11d ago
Exploitation attempts against critical Atlassian flaw have begun (CVE-2026-21589)
→ No new info (linked only)
Tier D
BleepingComputer12d ago
Hackers exploit critical Atlassian flaw after public PoC release
→ No new info (linked only)
Tier C
Rapid7 Blog12d ago
CVE-2026-21589: Critical unauthenticated arbitrary file access in Atlassian products
→ No new info (linked only)
Tier D
The Hacker News12d ago
Atlassian Data Center Flaw Draws Exploitation Attempts Within Two Hours of Public Details
→ No new info (linked only)
Tier D
Heise Security12d ago
Jetzt aktualisieren! Atlassian warnt vor kritischer Data-Center-Lücke
→ No new info (linked only)
Tier D
SecurityWeek12d ago
Atlassian Patches Critical Vulnerability Affecting 8 Products
→ No new info (linked only)
Tier D
CSO Online12d ago
Atlassian’s critical flaw turns eight enterprise products into one big security problem
→ No new info (linked only)
Tier D
BleepingComputer12d ago
Atlassian warns of critical file-access flaw in Jira, Confluence
→ No new info (linked only)
Tier E
Reddit r/cybersecurity12d ago
You Won’t Hear About These, Even In Myths (Atlassian Jira, Confluence (and more) Pre-Auth Arbitrary File Read CVE-2026-21589) - watchTowr Labs
→ No new info (linked only)
Tier E
Reddit r/netsec12d ago
You Won’t Hear About These, Even In Myths (Atlassian Jira, Confluence (and more) Pre-Auth Arbitrary File Read CVE-2026-21589) - watchTowr Labs
→ No new info (linked only)
Tier B
CCCS Canada12d ago
Atlassian security advisory (AV26-1002)
→ No new info (linked only)
Tier D
Help Net Security13d ago
Atlassian urges immediate patching of critical Data Center file access vulnerability (CVE-2026-21589)
→ No new info (linked only)
Tier B
BSI Advisories13d ago
[NEU] [hoch] Atlassian Produkte (Bamboo, Bitbucket, Confluence, Crucible, Fisheye und Jira): Schwachstelle ermöglicht Offenlegung von Informationen
→ No new info (linked only)
Tier D
The Hacker News13d ago
Critical Atlassian Flaw Lets Unauthenticated Attackers Read Known Files Across 8 Products
→ No new info (linked only)
Tier B
CERT-FR13d ago
Multiples vulnérabilités dans les produits Atlassian (06 octobre 2026)
→ No new info (linked only)
Tier C
VulDB13d ago
CVE-2026-21589 | Atlassian Bamboo Data Center path traversal
→ No new info (linked only)

Discussion (0)

Loading…

CISA KEV❌ No
Actively exploited❌ No
Patch available
Patch version 10.2.4 and laterPatch version 12.1.12 and laterPatch version 10.2.8 and laterPatch version 10.5.1 and laterPatch version 9.4.26 and laterPatch version 10.2.19 and laterPatch version 9.2.26 and laterPatch version 7.2.4 and laterPatch version 7.1.1 and laterPatch version 7.0.3 and laterPatch version 6.3.7 and laterPatch version 4.9.15 and laterPatch version 11.3.12 and laterPatch version 10.3.26 and laterPatch version 5.12.40 and laterPatch version 9.12.40 and later
PublishedOct 5, 2026
Last enriched13d ago
Trending Score81
Source articles25
Independent15
Info Completeness3/14
Missing: vendor, product, versions, cvss, epss, cwe, kev, exploit, patch, iocs, mitre_attack

Community Vote

0
Login to vote
0 upvotes0 downvotes
No votes yet

Related CVEs (5)

NONECVE-2026-21587
CVE-2026-21587: This High severity Improper Authorization vulnerability was introduced in version 11.3.0 of Jira Service Management Data
Trending: 1
NONECVE-2026-21586
CVE-2026-21586: This High severity Improper Authorization vulnerability was introduced in versions 7.4.0, 7.13.0, 8.5.0, 8.9.0, 9.0.1, 9
Trending: 1
NONECVE-2026-21582
CVE-2026-21582: This High severity BASM (Broken Authentication & Session Management) vulnerability known as CVE-2026-21582 was introduce
Trending: 1
NONECVE-2026-21580
CVE-2026-21580: This Critical severity Stored XSS, PrivEsc (Privilege Escalation), and Security Misconfiguration vulnerability was intro
NONECVE-2026-21577
CVE-2026-21577: This High severity DoS (Denial of Service) vulnerability was introduced in versions 9.0.1, 9.1.0, 9.2.0, 9.3.1, 9.4.0, 9

Pin to Dashboard

Verification

State: verified
Confidence: 100%

Vulnerability Timeline

CVE Published
Oct 5, 2026
Discovered by ZDM
Oct 5, 2026
Exploit Available
Oct 16, 2026
Patch Available
Oct 16, 2026