CVE-2026-21571 (GCVE-0-2026-21571)
Vulnerability from cvelistv5 – Published: 2026-04-21 17:00 – Updated: 2026-04-23 03:56
VLAI
EPSS
VEX
Summary
This Critical severity OS Command Injection vulnerability was introduced in versions 9.6.0, 10.0.0, 10.1.0, 10.2.0,
11.0.0, 11.1.0, 12.0.0, and 12.1.0 of Bamboo Data Center.
This RCE (Remote Code Execution) vulnerability, with a CVSS Score of 9.4 and a CVSS Vector of
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H allows an authenticated attacker to execute commands
on the remote system, which has high impact to confidentiality, high impact to integrity, high impact to availability,
and requires no user interaction.
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 9.6.0: Upgrade to a release greater than or equal to 9.6.25
Bamboo Data Center 10.2: Upgrade to a release greater than or equal to 10.2.18
Bamboo Data Center 12.1: Upgrade to a release greater than or equal to 12.1.6
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]).
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-22 00:00 UTC
CWE
- OS Command Injection
- CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Atlassian | Bamboo Data Center |
Affected:
12.1.0 to 12.1.3
Affected: 12.0.0 to 12.0.2 Affected: 11.0.0 to 11.0.8 Affected: 10.2.0 to 10.2.16 Affected: 10.1.0 to 10.1.1 Affected: 10.0.0 to 10.0.3 Affected: 9.6.2 to 9.6.24 Unaffected: 12.1.6 Unaffected: 10.2.18 Unaffected: 9.6.25 cpe:2.3:a:atlassian:bamboo:*:*:*:*:data_center:*:*:* cpe:2.3:a:atlassian:bamboo:9.6.6:*:*:*:data_center:*:*:* cpe:2.3:a:atlassian:bamboo:9.6.7:*:*:*:data_center:*:*:* cpe:2.3:a:atlassian:bamboo:9.6.8:*:*:*:data_center:*:*:* cpe:2.3:a:atlassian:bamboo:9.6.9:*:*:*:data_center:*:*:* cpe:2.3:a:atlassian:bamboo:9.6.10:*:*:*:data_center:*:*:* cpe:2.3:a:atlassian:bamboo:9.6.11:*:*:*:data_center:*:*:* cpe:2.3:a:atlassian:bamboo:9.6.12:*:*:*:data_center:*:*:* cpe:2.3:a:atlassian:bamboo:9.6.13:*:*:*:data_center:*:*:* cpe:2.3:a:atlassian:bamboo:9.6.14:*:*:*:data_center:*:*:* cpe:2.3:a:atlassian:bamboo:9.6.15:*:*:*:data_center:*:*:* cpe:2.3:a:atlassian:bamboo:9.6.16:*:*:*:data_center:*:*:* cpe:2.3:a:atlassian:bamboo:9.6.17:*:*:*:data_center:*:*:* cpe:2.3:a:atlassian:bamboo:9.6.18:*:*:*:data_center:*:*:* cpe:2.3:a:atlassian:bamboo:9.6.19:*:*:*:data_center:*:*:* cpe:2.3:a:atlassian:bamboo:9.6.20:*:*:*:data_center:*:*:* cpe:2.3:a:atlassian:bamboo:9.6.21:*:*:*:data_center:*:*:* cpe:2.3:a:atlassian:bamboo:9.6.22:*:*:*:data_center:*:*:* cpe:2.3:a:atlassian:bamboo:9.6.23:*:*:*:data_center:*:*:* cpe:2.3:a:atlassian:bamboo:9.6.24:*:*:*:data_center:*:*:* |
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Bamboo Data Center",
"vendor": "Atlassian",
"versions": [
{
"status": "affected",
"version": "12.1.0 to 12.1.3"
},
{
"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 10.2.16"
},
{
"status": "affected",
"version": "10.1.0 to 10.1.1"
},
{
"status": "affected",
"version": "10.0.0 to 10.0.3"
},
{
"status": "affected",
"version": "9.6.2 to 9.6.24"
},
{
"status": "unaffected",
"version": "12.1.6"
},
{
"status": "unaffected",
"version": "10.2.18"
},
{
"status": "unaffected",
"version": "9.6.25"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:atlassian:bamboo:*:*:*:*:data_center:*:*:*",
"versionEndIncluding": "9.6.24",
"versionStartIncluding": "9.6.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:atlassian:bamboo:9.6.6:*:*:*:data_center:*:*:*",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:atlassian:bamboo:9.6.7:*:*:*:data_center:*:*:*",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:atlassian:bamboo:9.6.8:*:*:*:data_center:*:*:*",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:atlassian:bamboo:9.6.9:*:*:*:data_center:*:*:*",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:atlassian:bamboo:9.6.10:*:*:*:data_center:*:*:*",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:atlassian:bamboo:9.6.11:*:*:*:data_center:*:*:*",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:atlassian:bamboo:9.6.12:*:*:*:data_center:*:*:*",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:atlassian:bamboo:9.6.13:*:*:*:data_center:*:*:*",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:atlassian:bamboo:9.6.14:*:*:*:data_center:*:*:*",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:atlassian:bamboo:9.6.15:*:*:*:data_center:*:*:*",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:atlassian:bamboo:9.6.16:*:*:*:data_center:*:*:*",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:atlassian:bamboo:9.6.17:*:*:*:data_center:*:*:*",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:atlassian:bamboo:9.6.18:*:*:*:data_center:*:*:*",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:atlassian:bamboo:9.6.19:*:*:*:data_center:*:*:*",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:atlassian:bamboo:9.6.20:*:*:*:data_center:*:*:*",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:atlassian:bamboo:9.6.21:*:*:*:data_center:*:*:*",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:atlassian:bamboo:9.6.22:*:*:*:data_center:*:*:*",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:atlassian:bamboo:9.6.23:*:*:*:data_center:*:*:*",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:atlassian:bamboo:9.6.24:*:*:*:data_center:*:*:*",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:atlassian:bamboo:9.6.25:*:*:*:data_center:*:*:*",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "This Critical severity OS Command Injection vulnerability was introduced in versions 9.6.0, 10.0.0, 10.1.0, 10.2.0,\r\n11.0.0, 11.1.0, 12.0.0, and 12.1.0 of Bamboo Data Center.\r\n\u00a0\r\nThis RCE (Remote Code Execution) vulnerability, with a CVSS Score of 9.4 and a CVSS Vector of\r\nCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H allows an authenticated attacker to execute commands\r\non the remote system, which has high impact to confidentiality, high impact to integrity, high impact to availability,\r\nand requires no user interaction.\r\n\u00a0\r\nAtlassian recommends that Bamboo Data Center customers upgrade to latest version, if you are unable to do so, upgrade\r\nyour instance to one of the specified supported fixed versions:\r\n Bamboo Data Center 9.6.0: Upgrade to a release greater than or equal to 9.6.25\r\n Bamboo Data Center 10.2: Upgrade to a release greater than or equal to 10.2.18\u00a0\r\n Bamboo Data Center 12.1: Upgrade to a release greater than or equal to 12.1.6\r\n\r\nSee 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])."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 9.4,
"baseSeverity": "CRITICAL",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
"version": "4.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "OS Command Injection",
"lang": "en",
"type": "OS Command Injection"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-04-21T17:00:05.524Z",
"orgId": "f08a6ab8-ed46-4c22-8884-d911ccfe3c66",
"shortName": "atlassian"
},
"references": [
{
"url": "https://confluence.atlassian.com/pages/viewpage.action?pageId=1770913890"
},
{
"url": "https://jira.atlassian.com/browse/BAM-26364"
}
]
}
},
"cveMetadata": {
"assignerOrgId": "f08a6ab8-ed46-4c22-8884-d911ccfe3c66",
"assignerShortName": "atlassian",
"cveId": "CVE-2026-21571",
"datePublished": "2026-04-21T17:00:05.524Z",
"dateReserved": "2026-01-01T00:00:40.720Z",
"dateUpdated": "2026-04-23T03:56:05.653Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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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.