CVE-2026-21589 (GCVE-0-2026-21589)
Vulnerability from cvelistv5 – Published: 2026-10-05 21:30 – Updated: 2026-10-06 18:09
VLAI
EPSS
VEX
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-06 18:08 UTC
CWE
- Path Traversal (Arbitrary Read/Write)
- CWE-552 - Files or Directories Accessible to External Parties
Assigner
References
8 references
Impacted products
8 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Atlassian | Bamboo Data Center |
Affected:
All other versions
Unaffected: Patch version 10.2.24 and later Unaffected: Patch version 12.1.12 and later |
guessed | |
| Atlassian | Bitbucket Data Center |
Affected:
All other versions
Unaffected: Patch version 10.2.8 and later Unaffected: Patch version 10.5.1 and later Unaffected: Patch version 9.4.26 and later |
guessed | |
| Atlassian | Confluence Data Center |
Affected:
All other versions
Unaffected: Patch version 10.2.19 and later Unaffected: Patch version 9.2.26 and later |
guessed | |
| Atlassian | Crowd Data Center |
Affected:
All other versions
Unaffected: Patch version 7.2.4 and later Unaffected: Patch version 7.1.7 and later Unaffected: Patch version 7.0.3 and later Unaffected: Patch version 6.3.7 and later |
guessed | |
| Atlassian | Crucible Data Center |
Affected:
All other versions
Unaffected: Patch version 4.9.15 and later |
guessed | |
| Atlassian | Fisheye Data Center |
Affected:
All other versions
Unaffected: Patch version 4.9.15 and later |
guessed | |
| Atlassian | Jira Service Management Data Center |
Affected:
All other versions
Unaffected: Patch version 11.3.12 and later Unaffected: Patch version 10.3.26 and later Unaffected: Patch version 5.12.40 and later |
guessed | |
| Atlassian | Jira Software Data Center |
Affected:
All other versions
Unaffected: Patch version 11.3.12 and later Unaffected: Patch version 10.3.26 and later Unaffected: Patch version 9.12.40 and later |
guessed |
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{
"product": "Crucible Server",
"vendor": "Atlassian",
"versions": [
{
"status": "affected",
"version": "All other versions"
},
{
"status": "unaffected",
"version": "Patch version 4.9.15 and later"
}
]
},
{
"product": "Fisheye Data Center",
"vendor": "Atlassian",
"versions": [
{
"status": "affected",
"version": "All other versions"
},
{
"status": "unaffected",
"version": "Patch version 4.9.15 and later"
}
]
},
{
"product": "Fisheye Server",
"vendor": "Atlassian",
"versions": [
{
"status": "affected",
"version": "All other versions"
},
{
"status": "unaffected",
"version": "Patch version 4.9.15 and later"
}
]
},
{
"product": "Jira Service Management Data Center",
"vendor": "Atlassian",
"versions": [
{
"status": "affected",
"version": "All other versions"
},
{
"status": "unaffected",
"version": "Patch version 11.3.12 and later"
},
{
"status": "unaffected",
"version": "Patch version 10.3.26 and later"
},
{
"status": "unaffected",
"version": "Patch version 5.12.40 and later"
}
]
},
{
"product": "Jira Service Management Server",
"vendor": "Atlassian",
"versions": [
{
"status": "affected",
"version": "All other versions"
},
{
"status": "unaffected",
"version": "Patch version 5.12.40 and later"
}
]
},
{
"product": "Jira Software Data Center",
"vendor": "Atlassian",
"versions": [
{
"status": "affected",
"version": "All other versions"
},
{
"status": "unaffected",
"version": "Patch version 11.3.12 and later"
},
{
"status": "unaffected",
"version": "Patch version 10.3.26 and later"
},
{
"status": "unaffected",
"version": "Patch version 9.12.40 and later"
}
]
},
{
"product": "Jira Software Server",
"vendor": "Atlassian",
"versions": [
{
"status": "affected",
"version": "All other versions"
},
{
"status": "unaffected",
"version": "Patch version 9.12.40 and later"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "h3. Summary\n\nThis 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\u0027s exact name and path; this vulnerability does not allow attackers to enumerate or list directory contents.\u00a0In some configurations, there may be some sensitive files that make this highly severe.\u00a0\u00a0\n\nh3. Context\n\nThis vulnerability allows an unauthenticated remote attacker to access specific files within the web application root directory in affected versions.\n\nh3. Details:\n\n* The vulnerability must be addressed for affected versions of:\n Bitbucket Data Center, introduced in version \u003e= 4.6.0, fix versions: 9.4.26, 10.2.8, 10.5.1\n Confluence Data Center, introduced in version \u003e= 5.10.0, fix versions 9.2.26, 10.2.19\n Crowd Data Center, introduced in version \u003e= 2.11.0, fix versions 6.3.7, 7.0.3, 7.1.1, 7.2.4\n Jira Software Data Center, introduced in version \u003e= 7.1.0, fix versions 9.12.40, 10.3.26, 11.3.12\n Jira Service Management Data Center, introduced in version \u003e= 3.1.0, fix versions 5.12.40, 10.3.26, 11.3.12\n Bamboo Data Center \u003e= 7.0.1, fix versions 10.2.24, 12.1.12\n Crucible, fix versions 4.9.15\n Fisheye, fix version 4.9.15\n* Exploitation requires prior knowledge of the target file\u0027s exact name and path.\n* The vulnerability does not include the capability to enumerate or list directory contents."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 9.3,
"baseSeverity": "CRITICAL",
"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",
"version": "4.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "Path Traversal (Arbitrary Read/Write)",
"lang": "en",
"type": "Path Traversal (Arbitrary Read/Write)"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-05T21:30:00.390Z",
"orgId": "f08a6ab8-ed46-4c22-8884-d911ccfe3c66",
"shortName": "atlassian"
},
"references": [
{
"url": "https://jira.atlassian.com/browse/BAM-26567"
},
{
"url": "https://jira.atlassian.com/browse/BSERV-20604"
},
{
"url": "https://jira.atlassian.com/browse/CONFSERVER-104488"
},
{
"url": "https://jira.atlassian.com/browse/CRUC-8741"
},
{
"url": "https://jira.atlassian.com/browse/CWD-6610"
},
{
"url": "https://jira.atlassian.com/browse/FE-7583"
},
{
"url": "https://jira.atlassian.com/browse/JRASERVER-79546"
},
{
"url": "https://jira.atlassian.com/browse/JSDSERVER-16809"
}
]
}
},
"cveMetadata": {
"assignerOrgId": "f08a6ab8-ed46-4c22-8884-d911ccfe3c66",
"assignerShortName": "atlassian",
"cveId": "CVE-2026-21589",
"datePublished": "2026-10-05T21:30:00.390Z",
"dateReserved": "2026-01-01T00:00:40.722Z",
"dateUpdated": "2026-10-05T21:30:00.390Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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