CVE-2026-101169: CWE-502: Deserialization of Untrusted Data in Octopus Deploy Octopus Server
In affected versions of Octopus Server, an authenticated user with permissions to edit an Environment or Project can set specifically crafted JSON content for the object. Insecure deserialization of this content allows the user to execute arbitrary code in the Octopus Server process.
AI Analysis
Technical Summary
In Octopus Server versions >=2019.4.1 <2026.1.11781, >=2026.2.0 <2026.2.13441, and >=2026.3.0 <2026.3.15829, an authenticated user with permissions to edit an Environment or Project can provide specially crafted JSON content. Due to insecure deserialization of this JSON, the user can execute arbitrary code in the Octopus Server process. This vulnerability is tracked as CWE-502 (Deserialization of Untrusted Data) and has a CVSS 4.0 score of 8.7, indicating high severity.
Potential Impact
Successful exploitation allows an authenticated user with limited privileges to execute arbitrary code on the Octopus Server, potentially leading to full compromise of the server process. This elevates the risk of unauthorized actions and control within the affected environment.
Mitigation Recommendations
A fix is available in versions 2026.1.11781 and later, 2026.2.13441 and later, and 2026.3.15829 and later. Users should upgrade to these fixed versions to remediate the vulnerability. No vendor advisory content was provided to indicate alternative mitigations or temporary workarounds.
CVE-2026-101169: CWE-502: Deserialization of Untrusted Data in Octopus Deploy Octopus Server
Description
In affected versions of Octopus Server, an authenticated user with permissions to edit an Environment or Project can set specifically crafted JSON content for the object. Insecure deserialization of this content allows the user to execute arbitrary code in the Octopus Server process.
CVSS v4.0
Score 8.7high
Affected software
Octopus Deploy
Octopus Server
pkg:github/octopusdeploy/octopusserverRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
In Octopus Server versions >=2019.4.1 <2026.1.11781, >=2026.2.0 <2026.2.13441, and >=2026.3.0 <2026.3.15829, an authenticated user with permissions to edit an Environment or Project can provide specially crafted JSON content. Due to insecure deserialization of this JSON, the user can execute arbitrary code in the Octopus Server process. This vulnerability is tracked as CWE-502 (Deserialization of Untrusted Data) and has a CVSS 4.0 score of 8.7, indicating high severity.
Potential Impact
Successful exploitation allows an authenticated user with limited privileges to execute arbitrary code on the Octopus Server, potentially leading to full compromise of the server process. This elevates the risk of unauthorized actions and control within the affected environment.
Mitigation Recommendations
A fix is available in versions 2026.1.11781 and later, 2026.2.13441 and later, and 2026.3.15829 and later. Users should upgrade to these fixed versions to remediate the vulnerability. No vendor advisory content was provided to indicate alternative mitigations or temporary workarounds.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Octopus
- Date Reserved
- 2026-09-28T09:09:50.229Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6abb70c5f7a7c54106071159
Added to database: 09/29/2026, 08:03:17 UTC
Last enriched: 09/29/2026, 08:17:42 UTC
Last updated: 09/29/2026, 18:20:12 UTC
Views: 13
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