CVE-2026-4881: Insufficient permission checks on an API endpoint in Octopus Deploy Octopus Server
CVE-2026-4881 is a medium severity vulnerability in Octopus Deploy's Octopus Server where insufficient permission checks on a specific API endpoint allow any authenticated user to make server-level changes. Although the API returns an error, the permission validation is flawed, potentially enabling unauthorized modifications. The affected versions include 2023. 0. 0, 2025. 4. 0, and 2026. 1. 0. There is no vendor advisory or patch information currently available, and no known exploits in the wild have been reported.
AI Analysis
Technical Summary
This vulnerability in Octopus Server arises from improper permission checks on an API endpoint, permitting authenticated users with limited privileges to perform server-level changes despite receiving error responses. The issue affects multiple versions of the product and has a CVSS 4.0 base score of 6.0, indicating a medium severity risk. No official remediation or patch has been documented as of the published date.
Potential Impact
The impact is that authenticated users with limited privileges may be able to bypass intended permission restrictions and make unauthorized server-level changes. This could lead to unauthorized configuration modifications or other administrative actions within the Octopus Server environment. No evidence of active exploitation is reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict authenticated user access to trusted personnel only and monitor for unusual activity related to API usage.
CVE-2026-4881: Insufficient permission checks on an API endpoint in Octopus Deploy Octopus Server
Description
CVE-2026-4881 is a medium severity vulnerability in Octopus Deploy's Octopus Server where insufficient permission checks on a specific API endpoint allow any authenticated user to make server-level changes. Although the API returns an error, the permission validation is flawed, potentially enabling unauthorized modifications. The affected versions include 2023. 0. 0, 2025. 4. 0, and 2026. 1. 0. There is no vendor advisory or patch information currently available, and no known exploits in the wild have been reported.
CVSS v4.0
Score 6.0medium
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Octopus Server arises from improper permission checks on an API endpoint, permitting authenticated users with limited privileges to perform server-level changes despite receiving error responses. The issue affects multiple versions of the product and has a CVSS 4.0 base score of 6.0, indicating a medium severity risk. No official remediation or patch has been documented as of the published date.
Potential Impact
The impact is that authenticated users with limited privileges may be able to bypass intended permission restrictions and make unauthorized server-level changes. This could lead to unauthorized configuration modifications or other administrative actions within the Octopus Server environment. No evidence of active exploitation is reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict authenticated user access to trusted personnel only and monitor for unusual activity related to API usage.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Octopus
- Date Reserved
- 2026-03-26T07:19:05.417Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a214d96e29bf47b50923256
Added to database: 6/4/2026, 10:04:06 AM
Last enriched: 6/4/2026, 10:18:59 AM
Last updated: 6/4/2026, 11:58:09 AM
Views: 2
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