CVE-2021-39132
YAML deserialization can run untrusted code
Rundeck is an open source automation service with a web console, command line tools and a WebAPI. Prior to version 3.3.14 and version 3.4.3, an authorized user can upload a zip-format plugin with a crafted plugin.yaml, or a crafted aclpolicy yaml file, or upload an untrusted project archive with a crafted aclpolicy yaml file, that can cause the server to run untrusted code on Rundeck Community or Enterprise Edition. An authenticated user can make a POST request, that can cause the server to run untrusted code on Rundeck Enterprise Edition. The zip-format plugin issues requires authentication and authorization to these access levels, and affects all Rundeck editions:admin level access to the system resource type. The ACL Policy yaml file upload issues requires authentication and authorization to these access levels, and affects all Rundeck editions: create update or admin level access to a project_acl resource, and/orcreate update or admin level access to the system_acl resource. The unauthorized POST request requires authentication, but no specific authorization, and affects Rundeck Enterprise only. Patches are available in versions 3.4.3, 3.3.14
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
YAML deserialization can run untrusted code
Rundeck is an open source automation service with a web console, command line tools and a WebAPI. Prior to version 3.3.14 and version 3.4.3, an authorized user can upload a zip-format plugin with a crafted plugin.yaml, or a crafted aclpolicy yaml file, or upload an untrusted project archive with a crafted aclpolicy yaml file, that can cause the server to run untrusted code on Rundeck Community or Enterprise Edition. An authenticated user can make a POST request, that can cause the server to run untrusted code on Rundeck Enterprise Edition. The zip-format plugin issues requires authentication and authorization to these access levels, and affects all Rundeck editions:admin level access to the system resource type. The ACL Policy yaml file upload issues requires authentication and authorization to these access levels, and affects all Rundeck editions: create update or admin level access to a project_acl resource, and/orcreate update or admin level access to the system_acl resource. The unauthorized POST request requires authentication, but no specific authorization, and affects Rundeck Enterprise only. Patches are available in versions 3.4.3, 3.3.14
- Record
CVE-2021-39132- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-502
- Updated
- 2026-11-02
EUVDEUVD-2021-2099
Rundeck is an open source automation service with a web console, command line tools and a WebAPI. Prior to version 3.3.14 and version 3.4.3, an authorized user can upload a zip-format plugin with a crafted plugin.yaml, or a crafted aclpolicy yaml file, or upload an untrusted project archive with a crafted aclpolicy yaml file, that can cause the server to run untrusted code on Rundeck Community or Enterprise Edition. An authenticated user can make a POST request, that can cause the server to run untrusted code on Rundeck Enterprise Edition. The zip-format plugin issues requires authentication and authorization to these access levels, and affects all Rundeck editions:admin level access to the system resource type. The ACL Policy yaml file upload issues requires authentication and authorization to these access levels, and affects all Rundeck editions: create update or admin level access to a project_acl resource, and/orcreate update or admin level access to the system_acl resource. The unauthorized POST request requires authentication, but no specific authorization, and affects Rundeck Enterprise only. Patches are available in versions 3.4.3, 3.3.14
- Record
EUVD-2021-2099- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-q4rf-3fhx-88pf
YAML deserialization can run untrusted code
Impact
An authorized user can upload a zip-format plugin with a crafted plugin.yaml, or a crafted aclpolicy yaml file, or upload an untrusted project archive with a crafted aclpolicy yaml file, that can cause the server to run untrusted code on Rundeck Community or Enterprise Edition. An authenticated user can make a POST request, that can cause the server to run untrusted code on Rundeck Enterprise Edition.
The zip-format plugin issues requires authentication and authorization to these access levels, and affects all Rundeck editions:
adminlevel access to thesystemresource type
The ACL Policy yaml file upload issues requires authentication and authorization to these access levels, and affects all Rundeck editions:
createupdateoradminlevel access to aproject_aclresourcecreateupdateoradminlevel access to thesystem_aclresource
The unauthorized POST request requires authentication, but no specific authorization, and affects Rundeck Enterprise only.
Patches
Versions 3.4.3, 3.3.14
Workarounds
Please visit https://rundeck.com/security for information about specific workarounds.
For more information
If you have any questions or comments about this advisory:
- Email us at [email protected]
To report security issues to Rundeck please use the form at https://rundeck.com/security
Reporter: Rojan Rijal from Tinder Red Team
- Record
GHSA-q4rf-3fhx-88pf- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-502
- Updated
- 2026-11-02
NVD
Rundeck is an open source automation service with a web console, command line tools and a WebAPI. Prior to version 3.3.14 and version 3.4.3, an authorized user can upload a zip-format plugin with a crafted plugin.yaml, or a crafted aclpolicy yaml file, or upload an untrusted project archive with a crafted aclpolicy yaml file, that can cause the server to run untrusted code on Rundeck Community or Enterprise Edition. An authenticated user can make a POST request, that can cause the server to run untrusted code on Rundeck Enterprise Edition. The zip-format plugin issues requires authentication and authorization to these access levels, and affects all Rundeck editions:admin level access to the system resource type. The ACL Policy yaml file upload issues requires authentication and authorization to these access levels, and affects all Rundeck editions: create update or admin level access to a project_acl resource, and/orcreate update or admin level access to the system_acl resource. The unauthorized POST request requires authentication, but no specific authorization, and affects Rundeck Enterprise only. Patches are available in versions 3.4.3, 3.3.14
- Record
CVE-2021-39132- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.5 Medium
AV:N/AC:L/Au:S/C:P/I:P/A:P - Weakness
- CWE-502
- Updated
- 2026-11-02
OSV
Rundeck is an open source automation service with a web console, command line tools and a WebAPI. Prior to version 3.3.14 and version 3.4.3, an authorized user can upload a zip-format plugin with a crafted plugin.yaml, or a crafted aclpolicy yaml file, or upload an untrusted project archive with a crafted aclpolicy yaml file, that can cause the server to run untrusted code on Rundeck Community or Enterprise Edition. An authenticated user can make a POST request, that can cause the server to run untrusted code on Rundeck Enterprise Edition. The zip-format plugin issues requires authentication and authorization to these access levels, and affects all Rundeck editions:admin level access to the system resource type. The ACL Policy yaml file upload issues requires authentication and authorization to these access levels, and affects all Rundeck editions: create update or admin level access to a project_acl resource, and/orcreate update or admin level access to the system_acl resource. The unauthorized POST request requires authentication, but no specific authorization, and affects Rundeck Enterprise only. Patches are available in versions 3.4.3, 3.3.14
- Record
CVE-2021-39132- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVGHSA-q4rf-3fhx-88pf
YAML deserialization can run untrusted code
Impact
An authorized user can upload a zip-format plugin with a crafted plugin.yaml, or a crafted aclpolicy yaml file, or upload an untrusted project archive with a crafted aclpolicy yaml file, that can cause the server to run untrusted code on Rundeck Community or Enterprise Edition. An authenticated user can make a POST request, that can cause the server to run untrusted code on Rundeck Enterprise Edition.
The zip-format plugin issues requires authentication and authorization to these access levels, and affects all Rundeck editions:
adminlevel access to thesystemresource type
The ACL Policy yaml file upload issues requires authentication and authorization to these access levels, and affects all Rundeck editions:
createupdateoradminlevel access to aproject_aclresourcecreateupdateoradminlevel access to thesystem_aclresource
The unauthorized POST request requires authentication, but no specific authorization, and affects Rundeck Enterprise only.
Patches
Versions 3.4.3, 3.3.14
Workarounds
Please visit https://rundeck.com/security for information about specific workarounds.
For more information
If you have any questions or comments about this advisory:
- Email us at [email protected]
To report security issues to Rundeck please use the form at https://rundeck.com/security
Reporter: Rojan Rijal from Tinder Red Team
- Record
GHSA-q4rf-3fhx-88pf- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-502
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
org.rundeck:rundeck-coreMaven |
3.4.0 up to 3.4.3 | 3.4.3 |
org.rundeck:rundeck-coreMaven |
before 3.3.14 | 3.3.14 |
org.rundeck:rundeck-coreMaven |
3.4.0 up to 3.4.3, plus listed versions 3.4.0-202106143.4.1-202106143.4.1-202107153.4.1-rc1-202106293.4.1-rc2-20210705 Show 6 moreShow less3.4.1-rc3-202107093.4.2-202108033.4.2-rc1-202107263.4.2-rc2-202107293.4.3-rc1-202108133.4.3-rc2-20210816 |
3.4.3 |
org.rundeck:rundeck-coreMaven |
before 3.3.14, plus listed versions 1.4.41.4.51.51.5.11.5.2 Show 45 moreShow less1.5.31.6.01.6.11.6.22.0.02.0.12.0.22.0.32.0.42.1.02.1.12.1.22.1.32.10.02.10.12.10.22.10.32.10.42.10.52.10.62.10.72.10.82.11.02.11.0-RC12.11.12.11.102.11.112.11.122.11.132.11.142.11.22.11.32.11.42.11.52.11.62.11.72.11.82.11.92.2.02.2.12.2.22.2.32.3.02.3.12.3.2 |
3.3.14 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-39132 is a high vulnerability (CVSS 8.8) in Pagerduty Rundeck, published August 30, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.69%, the 77th percentile. Fixed in org.rundeck:rundeck-core 3.4.3.
References
Left out here: 131 versions. The JSON record has them.