CVE Details
CVE-2026-21589
Atlassian Multiple Products Files or Directories Accessible to External Parties Vulnerability
Published: 2026-10-15
CVSS: 9.3 CRITICAL
Product: Atlassian Multiple Products
Due Date: 2026-10-18
Multiple Atlassian products (Bitbucket Data Center ,Confluence Data Center, Jira Service Management Data Center, Jira Software Data Center, Bamboo Data Center, Crowd Data Center, Crucible and Fisheye) contain a files or directories accessible to external parties vulnerability which could allow an unauthenticated attacker to access specific files within the web application root directory in affected versions.
GitHub PoC
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FIRST EPSS
EPSS estimates the probability of exploitation in the next 30 days. Higher values indicate higher likelihood of real-world exploitation.
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Show Raw Data
| Key | Remaining Key | Value |
|---|---|---|
| dataType | CVE_RECORD | |
| dataVersion | 5.2 | |
| cveMetadata > | cveId | CVE-2026-21589 |
| cveMetadata > | assignerOrgId | f08a6ab8-ed46-4c22-8884-d911ccfe3c66 |
| cveMetadata > | state | PUBLISHED |
| cveMetadata > | assignerShortName | atlassian |
| cveMetadata > | dateReserved | 2026-01-01T00:00:40.722Z |
| cveMetadata > | datePublished | 2026-10-05T21:30:00.390Z |
| cveMetadata > | dateUpdated | 2026-10-15T14:10:48.290Z |
| containers > | cna > affected > 0 > vendor | Atlassian |
| containers > | cna > affected > 0 > product | Bamboo Data Center |
| containers > | cna > affected > 0 > versions > 0 > version | All other versions |
| containers > | cna > affected > 0 > versions > 0 > status | affected |
| containers > | cna > affected > 0 > versions > 1 > version | Patch version 10.2.24 and later |
| containers > | cna > affected > 0 > versions > 1 > status | unaffected |
| containers > | cna > affected > 0 > versions > 2 > version | Patch version 12.1.12 and later |
| containers > | cna > affected > 0 > versions > 2 > status | unaffected |
| containers > | cna > affected > 1 > vendor | Atlassian |
| containers > | cna > affected > 1 > product | Bitbucket Data Center |
| containers > | cna > affected > 1 > versions > 0 > version | All other versions |
| containers > | cna > affected > 1 > versions > 0 > status | affected |
| containers > | cna > affected > 1 > versions > 1 > version | Patch version 10.2.8 and later |
| containers > | cna > affected > 1 > versions > 1 > status | unaffected |
| containers > | cna > affected > 1 > versions > 2 > version | Patch version 10.5.1 and later |
| containers > | cna > affected > 1 > versions > 2 > status | unaffected |
| containers > | cna > affected > 1 > versions > 3 > version | Patch version 9.4.26 and later |
| containers > | cna > affected > 1 > versions > 3 > status | unaffected |
| containers > | cna > affected > 2 > vendor | Atlassian |
| containers > | cna > affected > 2 > product | Confluence Data Center |
| containers > | cna > affected > 2 > versions > 0 > version | All other versions |
| containers > | cna > affected > 2 > versions > 0 > status | affected |
| containers > | cna > affected > 2 > versions > 1 > version | Patch version 10.2.19 and later |
| containers > | cna > affected > 2 > versions > 1 > status | unaffected |
| containers > | cna > affected > 2 > versions > 2 > version | Patch version 9.2.26 and later |
| containers > | cna > affected > 2 > versions > 2 > status | unaffected |
| containers > | cna > affected > 3 > vendor | Atlassian |
| containers > | cna > affected > 3 > product | Crowd Data Center |
| containers > | cna > affected > 3 > versions > 0 > version | All other versions |
| containers > | cna > affected > 3 > versions > 0 > status | affected |
| containers > | cna > affected > 3 > versions > 1 > version | Patch version 7.2.4 and later |
| containers > | cna > affected > 3 > versions > 1 > status | unaffected |
| containers > | cna > affected > 3 > versions > 2 > version | Patch version 7.1.7 and later |
| containers > | cna > affected > 3 > versions > 2 > status | unaffected |
| containers > | cna > affected > 3 > versions > 3 > version | Patch version 7.0.3 and later |
| containers > | cna > affected > 3 > versions > 3 > status | unaffected |
| containers > | cna > affected > 3 > versions > 4 > version | Patch version 6.3.7 and later |
| containers > | cna > affected > 3 > versions > 4 > status | unaffected |
| containers > | cna > affected > 4 > vendor | Atlassian |
| containers > | cna > affected > 4 > product | Crucible Data Center |
| containers > | cna > affected > 4 > versions > 0 > version | All other versions |
| containers > | cna > affected > 4 > versions > 0 > status | affected |
| containers > | cna > affected > 4 > versions > 1 > version | Patch version 4.9.15 and later |
| containers > | cna > affected > 4 > versions > 1 > status | unaffected |
| containers > | cna > affected > 5 > vendor | Atlassian |
| containers > | cna > affected > 5 > product | Fisheye Data Center |
| containers > | cna > affected > 5 > versions > 0 > version | All other versions |
| containers > | cna > affected > 5 > versions > 0 > status | affected |
| containers > | cna > affected > 5 > versions > 1 > version | Patch version 4.9.15 and later |
| containers > | cna > affected > 5 > versions > 1 > status | unaffected |
| containers > | cna > affected > 6 > vendor | Atlassian |
| containers > | cna > affected > 6 > product | Jira Service Management Data Center |
| containers > | cna > affected > 6 > versions > 0 > version | All other versions |
| containers > | cna > affected > 6 > versions > 0 > status | affected |
| containers > | cna > affected > 6 > versions > 1 > version | Patch version 11.3.12 and later |
| containers > | cna > affected > 6 > versions > 1 > status | unaffected |
| containers > | cna > affected > 6 > versions > 2 > version | Patch version 10.3.26 and later |
| containers > | cna > affected > 6 > versions > 2 > status | unaffected |
| containers > | cna > affected > 6 > versions > 3 > version | Patch version 5.12.40 and later |
| containers > | cna > affected > 6 > versions > 3 > status | unaffected |
| containers > | cna > affected > 7 > vendor | Atlassian |
| containers > | cna > affected > 7 > product | Jira Software Data Center |
| containers > | cna > affected > 7 > versions > 0 > version | All other versions |
| containers > | cna > affected > 7 > versions > 0 > status | affected |
| containers > | cna > affected > 7 > versions > 1 > version | Patch version 11.3.12 and later |
| containers > | cna > affected > 7 > versions > 1 > status | unaffected |
| containers > | cna > affected > 7 > versions > 2 > version | Patch version 10.3.26 and later |
| containers > | cna > affected > 7 > versions > 2 > status | unaffected |
| containers > | cna > affected > 7 > versions > 3 > version | Patch version 9.12.40 and later |
| containers > | cna > affected > 7 > versions > 3 > status | unaffected |
| containers > | cna > descriptions > 0 > lang | en |
| containers > | cna > descriptions > 0 > value | 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. |
| containers > | cna > problemTypes > 0 > descriptions > 0 > description | Path Traversal (Arbitrary Read/Write) |
| containers > | cna > problemTypes > 0 > descriptions > 0 > lang | en |
| containers > | cna > problemTypes > 0 > descriptions > 0 > type | Path Traversal (Arbitrary Read/Write) |
| containers > | cna > references > 0 > url | https://jira.atlassian.com/browse/BAM-26567 |
| containers > | cna > references > 1 > url | https://jira.atlassian.com/browse/BSERV-20604 |
| containers > | cna > references > 2 > url | https://jira.atlassian.com/browse/CONFSERVER-104488 |
| containers > | cna > references > 3 > url | https://jira.atlassian.com/browse/CRUC-8741 |
| containers > | cna > references > 4 > url | https://jira.atlassian.com/browse/CWD-6610 |
| containers > | cna > references > 5 > url | https://jira.atlassian.com/browse/FE-7583 |
| containers > | cna > references > 6 > url | https://jira.atlassian.com/browse/JRASERVER-79546 |
| containers > | cna > references > 7 > url | https://jira.atlassian.com/browse/JSDSERVER-16809 |
| containers > | cna > metrics > 0 > cvssV4_0 > version | 4.0 |
| containers > | cna > metrics > 0 > cvssV4_0 > vectorString | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H |
| containers > | cna > metrics > 0 > cvssV4_0 > baseScore | 9.3 |
| containers > | cna > metrics > 0 > cvssV4_0 > baseSeverity | CRITICAL |
| containers > | cna > providerMetadata > orgId | f08a6ab8-ed46-4c22-8884-d911ccfe3c66 |
| containers > | cna > providerMetadata > shortName | atlassian |
| containers > | cna > providerMetadata > dateUpdated | 2026-10-06T16:30:55.209Z |
| containers > | adp > 0 > problemTypes > 0 > descriptions > 0 > type | CWE |
| containers > | adp > 0 > problemTypes > 0 > descriptions > 0 > cweId | CWE-552 |
| containers > | adp > 0 > problemTypes > 0 > descriptions > 0 > lang | en |
| containers > | adp > 0 > problemTypes > 0 > descriptions > 0 > description | CWE-552 Files or Directories Accessible to External Parties |
| containers > | adp > 0 > references > 0 > url | https://github.com/watchtowrlabs/watchTowr-vs-Atlassian-CVE-2026-21589 |
| containers > | adp > 0 > references > 0 > tags > 0 | exploit |
| containers > | adp > 0 > metrics > 0 > other > type | ssvc |
| containers > | adp > 0 > metrics > 0 > other > content > timestamp | 2026-10-15T14:10:40.958067Z |
| containers > | adp > 0 > metrics > 0 > other > content > id | CVE-2026-21589 |
| containers > | adp > 0 > metrics > 0 > other > content > options > 0 > Exploitation | poc |
| containers > | adp > 0 > metrics > 0 > other > content > options > 1 > Automatable | no |
| containers > | adp > 0 > metrics > 0 > other > content > options > 2 > Technical Impact | total |
| containers > | adp > 0 > metrics > 0 > other > content > role | CISA Coordinator |
| containers > | adp > 0 > metrics > 0 > other > content > version | 2.0.3 |
| containers > | adp > 0 > title | CISA ADP Vulnrichment |
| containers > | adp > 0 > providerMetadata > orgId | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
| containers > | adp > 0 > providerMetadata > shortName | CISA-ADP |
| containers > | adp > 0 > providerMetadata > dateUpdated | 2026-10-15T14:10:48.290Z |