CVE-2026-104965— Plane: Cross-Tenant Issue Relation Creation via IDOR
Quick assessment
Affected
makeplane plane
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.
Plane 是一个开源的项目管理工具。在 1.4.0 版本之前，issue-relation 端点接受请求体中的问题 UUID，但并未验证这些 UUID 是否属于调用者所在的工作区。经过身份验证的用户可以创建关系，将其自身的问题与实例中任何其他工作区的问题关联起来，从而通过活动事件泄露问题元数据。该问题已在 1.4.0 版本中修复。
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I. Basic Information for CVE-2026-104965
Vulnerability Information
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Vulnerability Title
Plane: Cross-Tenant Issue Relation Creation via IDOR
Source: CVE Program / CVE List V5
Vulnerability Description
Plane is an open-source project management tool. Prior to 1.4.0, the issue-relation endpoint accepts issue UUIDs in the request body without validating that they belong to the caller's workspace. An authenticated user can create relations linking their own issues to issues in any other workspace on the instance, leaking issue metadata through activity events. This issue is fixed in 1.4.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-104965
| # | POC Description | Source Link | Shenlong Link |
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Other References for CVE-2026-104965 (4)
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https://github.com/makeplane/plane/pull/9269 x_refsource_MISC
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https://github.com/makeplane/plane/releases/tag/v1.4.0 x_refsource_MISC
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https://github.com/makeplane/plane/security/advisories/GHSA-8cvv-8jh5-g6mj x_refsource_CONFIRM
Same Patch Batch · makeplane · 2026-10-05 · 38 CVEs total
| CVE-2026-105636 | 9.9 CRITICAL | Plane: SSRF via HTTP redirect in webhook delivery (allow_redirects not set) |
| CVE-2026-105639 | 9.8 CRITICAL | Plane: Pre-auth workspace invitation hijack via email-squat and self-served invitation tok |
| CVE-2026-105641 | 9.8 CRITICAL | Plane: Hardcoded SECRET_KEY and LIVE_SERVER_SECRET_KEY shipped in aio/cli community deploy |
| CVE-2026-105637 | 9.6 CRITICAL | Plane: Cross-Project Asset Hijacking via 'ProjectBulkAssetEndpoint' (sibling of CVE-2026-4 |
| CVE-2026-105638 | 9.1 CRITICAL | Plane: Magic-code verifier endpoint has no rate limit, enabling 6-digit OTP brute force |
| CVE-2026-105640 | 9.1 CRITICAL | Plane: Account Takeover via Unverified OAuth Email Match (Gitea, self-managed GitLab) |
| CVE-2026-104968 | 8.7 HIGH | Plane: Cross-workspace member enumeration via /api/workspaces/{slug}/entity-search/ |
| CVE-2026-105630 | 8.7 HIGH | Plane: Stored XSS via SVG attachment served inline on the application origin (account take |
| CVE-2026-105632 | 8.7 HIGH | Plane: Broken Access Control - joinProject GraphQL mutation allows self-join into private |
| CVE-2026-104979 | 8.7 HIGH | Plane: Cross-tenant stored XSS in intake enables account takeover |
| CVE-2026-104976 | 8.7 HIGH | Plane: SSRF in Gitea OAuth |
| CVE-2026-104966 | 8.7 HIGH | Plane: Cross-Workspace IDOR in Estimate and Comment Endpoints Allows Read, Modify, and Inj |
| CVE-2026-104892 | 8.7 HIGH | Plane: Plaintext logging of API token |
| CVE-2026-104971 | 8.5 HIGH | Plane: Cross-Workspace Asset Duplication IDOR + WorkspaceFileAssetEndpoint and FileAssetEn |
| CVE-2026-104978 | 8.2 HIGH | Plane: Invitation Hijack in Project Join Flow via Missing Authorization and Email-Only Acc |
| CVE-2026-105634 | 8.1 HIGH | Plane: Privilege Escalation: Project Guest Can Demote Admin/Member Roles |
| CVE-2026-104974 | 8.1 HIGH | Plane: Disabled User Auto-Reactivation on Login |
| CVE-2026-104970 | 8.1 HIGH | Plane: InstanceAdminSignUpEndpoint TOCTOU race allows two concurrent unauthenticated calle |
| CVE-2026-104977 | 7.7 HIGH | Plane: Incomplete fix of CVE-2026-27706 — SSRF still reachable on: missing is_blocked_ip ( |
| CVE-2026-105628 | 7.6 HIGH | Plane: OAuth Avatar Redirect SSRF Leads to Internal Data Exfiltration via Static Asset End |
Showing top 20 of 38 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: plane
-
CVE-2026-105641
Plane: Hardcoded SECRET_KEY and LIVE_SERVER_SECRET_KEY shipp -
CVE-2026-105640
Plane: Account Takeover via Unverified OAuth Email Match (Gi -
CVE-2026-105639
Plane: Pre-auth workspace invitation hijack via email-squat -
CVE-2026-105638
Plane: Magic-code verifier endpoint has no rate limit, enabl -
CVE-2026-105637
Plane: Cross-Project Asset Hijacking via 'ProjectBulkAssetEn
Same vendor: makeplane
-
CVE-2026-105641
Plane: Hardcoded SECRET_KEY and LIVE_SERVER_SECRET_KEY shipp -
CVE-2026-105640
Plane: Account Takeover via Unverified OAuth Email Match (Gi -
CVE-2026-105639
Plane: Pre-auth workspace invitation hijack via email-squat -
CVE-2026-105638
Plane: Magic-code verifier endpoint has no rate limit, enabl -
CVE-2026-105637
Plane: Cross-Project Asset Hijacking via 'ProjectBulkAssetEn
Same weakness: CWE-639
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CVE-2026-97070
WordPress Cozy Blocks plugin <= 2.2.23 - Insecure Direct Obj -
CVE-2026-105637
Plane: Cross-Project Asset Hijacking via 'ProjectBulkAssetEn -
CVE-2026-105633
Plane: Issue Attachment Ownership Hijacking via Missing `iss -
CVE-2026-105631
Plane: asset download endpoints scope file lookups to the wo
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