CVE-2026-21584
Full vulnerability record from the local CVENow database.
Description
This High severity Improper Authorization vulnerability was introduced in versions 10.0.0, 10.1.0, 10.2.0, 11.0.0, 12.0.0, and 12.1.0 of Bamboo Data Center. This Improper Authorization vulnerability, with a CVSS Score of 7.6, allows an authenticated attacker to gain unintended access and can lead to the exposure of resources or functionality, possibly providing attackers with sensitive information or even execute arbitrary code. Atlassian recommends that Bamboo Data Center customers upgrade to latest version, if you are unable to do so, upgrade your instance to one of the specified supported fixed versions: * Bamboo Data Center 10.2: Upgrade to a release greater than or equal to 10.2.22 * Bamboo Data Center 12.1: Upgrade to a release greater than or equal to 12.1.10 See the release notes (https://confluence.atlassian.com/bambooreleases/bamboo-release-notes-1189793869.html). You can download the latest version of Bamboo Data Center from the download center (https://www.atlassian.com/software/bamboo/download-archives). This vulnerability was reported via our Penetration Testing program.
Severity
HIGH
CVSS score
7.6
(v4.0)
Vulnerability status
Analyzed
Source identifier
Published
2026-08-18 22:16:50.460000
Last modified
2026-10-22 17:09:59.477000
View original CVE JSON
{
"id": "CVE-2026-21584",
"sourceIdentifier": "[email protected]",
"published": "2026-08-18T22:16:50.460",
"lastModified": "2026-10-22T17:09:59.477",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "This High severity Improper Authorization vulnerability was introduced in versions 10.0.0, 10.1.0, 10.2.0, 11.0.0, 12.0.0, and 12.1.0 of Bamboo Data Center. \n\t\n\tThis Improper Authorization vulnerability, with a CVSS Score of 7.6, allows an authenticated attacker to gain unintended access and can lead to the exposure of resources or functionality, possibly providing attackers with sensitive information or even execute arbitrary code. \n\t\n\tAtlassian recommends that Bamboo Data Center customers upgrade to latest version, if you are unable to do so, upgrade your instance to one of the specified supported fixed versions:\n\t\t\n\t\t* Bamboo Data Center 10.2: Upgrade to a release greater than or equal to 10.2.22\n\t\t\n\t\t* Bamboo Data Center 12.1: Upgrade to a release greater than or equal to 12.1.10\n\t\t\n\t\t\n\t\n\tSee the release notes (https://confluence.atlassian.com/bambooreleases/bamboo-release-notes-1189793869.html). You can download the latest version of Bamboo Data Center from the download center (https://www.atlassian.com/software/bamboo/download-archives). \n\t\n\tThis vulnerability was reported via our Penetration Testing program."
},
{
"lang": "es",
"value": "Esta vulnerabilidad de autorización indebida de alta gravedad se introdujo en las versiones 10.0.0, 10.1.0, 10.2.0, 11.0.0, 12.0.0 y 12.1.0 de Bamboo Data Center.\n\nEsta vulnerabilidad de autorización indebida, con una puntuación CVSS de 7.6, permite a un atacante autenticado obtener acceso no intencionado y puede llevar a la exposición de recursos o funcionalidades, posiblemente proporcionando a los atacantes información sensible o incluso ejecutar código arbitrario.\n\nAtlassian recomienda que los clientes de Bamboo Data Center actualicen a la última versión; si no puede hacerlo, actualice su instancia a una de las versiones fijas compatibles especificadas:\n\n* Bamboo Data Center 10.2: Actualice a una versión mayor o igual a 10.2.22\n\n* Bamboo Data Center 12.1: Actualice a una versión mayor o igual a 12.1.10\n\nConsulte las notas de la versión (https://confluence.atlassian.com/bambooreleases/bamboo-release-notes-1189793869.html). Puede descargar la última versión de Bamboo Data Center desde el centro de descargas (https://www.atlassian.com/software/bamboo/download-archives).\n\nEsta vulnerabilidad fue reportada a través de nuestro programa de pruebas de penetración."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "Atlassian",
"product": "Bamboo Data Center",
"versions": [
{
"version": "12.1.0 to 12.1.9",
"status": "affected"
},
{
"version": "12.0.0 to 12.0.2",
"status": "affected"
},
{
"version": "11.0.0 to 11.0.8",
"status": "affected"
},
{
"version": "10.2.0 to 10.2.21",
"status": "affected"
},
{
"version": "10.1.0 to 10.1.1",
"status": "affected"
},
{
"version": "10.0.0 to 10.0.3",
"status": "affected"
},
{
"version": "12.1.10",
"status": "unaffected"
},
{
"version": "10.2.22",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV40": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "4.0",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"baseScore": 7.6,
"baseSeverity": "HIGH",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH",
"vulnAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"subAvailabilityImpact": "NONE",
"exploitMaturity": "NOT_DEFINED",
"confidentialityRequirement": "NOT_DEFINED",
"integrityRequirement": "NOT_DEFINED",
"availabilityRequirement": "NOT_DEFINED",
"modifiedAttackVector": "NOT_DEFINED",
"modifiedAttackComplexity": "NOT_DEFINED",
"modifiedAttackRequirements": "NOT_DEFINED",
"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedUserInteraction": "NOT_DEFINED",
"modifiedVulnConfidentialityImpact": "NOT_DEFINED",
"modifiedVulnIntegrityImpact": "NOT_DEFINED",
"modifiedVulnAvailabilityImpact": "NOT_DEFINED",
"modifiedSubConfidentialityImpact": "NOT_DEFINED",
"modifiedSubIntegrityImpact": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"valueDensity": "NOT_DEFINED",
"vulnerabilityResponseEffort": "NOT_DEFINED",
"providerUrgency": "NOT_DEFINED"
}
}
],
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Primary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
"baseScore": 8.1,
"baseSeverity": "HIGH",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "NONE"
},
"exploitabilityScore": 2.8,
"impactScore": 5.2
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-08-20T03:56:06.324621Z",
"id": "CVE-2026-21584",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-285"
}
]
}
],
"configurations": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:a:atlassian:bamboo:*:*:*:*:*:*:*:*",
"versionStartIncluding": "10.0.0",
"versionEndExcluding": "10.2.22",
"matchCriteriaId": "438F604E-FB6C-4E39-90AC-C9240A7C76E9"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:atlassian:bamboo:*:*:*:*:*:*:*:*",
"versionStartIncluding": "11.0.0",
"versionEndExcluding": "12.1.10",
"matchCriteriaId": "3FE0CF89-4910-4C1D-9C4F-D28F2BA41CDC"
}
]
}
]
}
],
"references": [
{
"url": "https://confluence.atlassian.com/pages/viewpage.action?pageId=1821999768",
"source": "[email protected]",
"tags": [
"Vendor Advisory"
]
},
{
"url": "https://jira.atlassian.com/browse/BAM-26468",
"source": "[email protected]",
"tags": [
"Issue Tracking",
"Vendor Advisory"
]
}
]
}