CVE-2026-116835

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.

在受影响的 Octopus Server 版本中，由于对 OIDC 账户的自定义声明（custom claims）验证不足，拥有编辑账户权限的用户可诱使 Octopus Server 签发签名的 OIDC 令牌，从而冒充其他项目。这可能导致攻击者获得受信任该项目身份的外部系统（例如云服务商或其他 Octopus 实例）的访问权限。

CVSS 8.7 · High Updated Nov 12, 2026

Possible ATT&CK Techniques 2 AI

T1552 · Unsecured Credentials T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

N/A

Source: CVE Program / CVE List V5

Vulnerability Description

In affected versions of Octopus Server, insufficient validation of custom claims on OIDC accounts allowed a user with permission to edit accounts to cause Octopus Server to issue signed OIDC tokens that impersonate a different project. This could grant access to external systems, such as cloud providers or other Octopus instances, that trust that project's identity.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Source: CVE Program / CVE List V5

Vulnerability Type

CWE-915

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Octopus Deploy	Octopus Server	2025.3.11571 ~ 2026.2.13503	-

II. Public POCs for CVE-2026-116835

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-116835

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Other References for CVE-2026-116835 (1)

https://advisories.octopus.com/post/2026/sa2026-22

https://www.cve.org/CVERecord?id=CVE-2026-116835

Same Patch Batch · Octopus Deploy · 2026-11-12 · 3 CVEs total

CVE-2026-124627	8.7 HIGH	Octopus Server 身份验证漏洞：LDAP 权限越权
CVE-2026-124628	8.7 HIGH	Octopus Server 版本 LDAP 身份验证绕过漏洞

IV. Related Vulnerabilities

Same product: Octopus Server

Same vendor: Octopus Deploy

Same weakness: CWE-915