CVE-2026-4881
Quick assessment
Affected
Octopus Deploy Octopus Server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Octopus Server是澳大利亚Octopus公司的一个用于持续交付的部署自动化和发布管理工具。 Octopus Server受影响版本存在安全漏洞，该漏洞源于权限检查不正确，导致任何经过身份验证的用户可通过特定API端点进行服务器级别更改，尽管收到错误提示。
Possible ATT&CK Techniques 1 AI
T1528 · Steal Application Access TokenAffected Version Matrix 3
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Octopus Deploy | Octopus Server | 2023.0.0< 2025.4.10523 |
affected |
2025.4.0< 2025.4.10545 |
affected | ||
2026.1.0< 2026.1.11313 |
affected |
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I. Basic Information for CVE-2026-4881
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
In affected versions of Octopus Server, permissions were not checked correctly resulting in any authenticated user being able to make server level changes using a certain API endpoint despite receiving an error.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Octopus Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Octopus Server是澳大利亚Octopus公司的一个用于持续交付的部署自动化和发布管理工具。 Octopus Server受影响版本存在安全漏洞，该漏洞源于权限检查不正确，导致任何经过身份验证的用户可通过特定API端点进行服务器级别更改，尽管收到错误提示。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Octopus Deploy | Octopus Server | 2023.0.0 ~ 2025.4.10523 | - |
|
II. Public POCs for CVE-2026-4881
| # | POC Description | Source Link | Shenlong Link |
|---|
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