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CVE-2026-4881

AI Predicted 8.1 Difficulty: Easy EPSS 0.21% · P11

Possible ATT&CK Techniques 1AI

T1528 · Steal Application Access Token

Affected Version Matrix 3

VendorProductVersion RangeStatus
Octopus DeployOctopus Server2023.0.0< 2025.4.10523affected
2025.4.0< 2025.4.10545affected
2026.1.0< 2026.1.11313affected
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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

VendorProductAffected VersionsCPESubscribe
Octopus DeployOctopus Server 2023.0.0 ~ 2025.4.10523 -

II. Public POCs for CVE-2026-4881

#POC DescriptionSource LinkShenlong Link
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III. Intelligence Information for CVE-2026-4881

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Vendor Advisories for CVE-2026-4881 (1)

IV. Related Vulnerabilities

Same product: Octopus Server
Same vendor: Octopus Deploy

V. Comments for CVE-2026-4881

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