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CVE-2026-102981— Plane: Unauthenticated Workspace Invitation Token Leakage

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 是一款开源的项目管理工具。在 1.4.0 版本之前，自托管部署的 Plane 实例允许未认证的 GET 请求通过 访问 接口。 会直接暴露秘密邀请令牌（secret invitation token），并通过 方法返回该令牌。 外部攻击者可以获取本应发送给其他用户的邀请令牌，并将其提交至邀请接受流程，从而在未实际收到邀请的情况下加入工作区，并获得该邀请所分配的角色权限。该问题已在 1.4.0 版本中得到修复。

CVSS 6.5 · Medium

Possible ATT&CK Techniques 1 AI

T1136.001 · Local Account

Affected Version Matrix 1

VendorProduct Version RangeStatus
makeplane plane < 1.4.0 affected
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I. Basic Information for CVE-2026-102981

Vulnerability Information
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Vulnerability Title
Plane: Unauthenticated Workspace Invitation Token Leakage
Source: CVE Program / CVE List V5
Vulnerability Description
Plane is an open-source project management tool. Prior to 1.4.0, self-hosted Plane deployments allow unauthenticated GET requests to api/workspaces/{slug}/invitations/{pk}/join/ through WorkspaceJoinEndpoint, whose WorkSpaceMemberInviteSerializer exposes the secret invitation token directly and through get_invite_link. An external attacker can retrieve a token intended for another user and submit it to the invitation acceptance flow, joining the workspace without receiving the invitation and gaining the role assigned to the invite. This issue is fixed in version 1.4.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
makeplane plane < 1.4.0 -

II. Public POCs for CVE-2026-102981

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III. Intelligence Information for CVE-2026-102981

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Patches & Fixes for CVE-2026-102981 (2)

Vendor Advisories for CVE-2026-102981 (1)

Vendor Pages for CVE-2026-102981 (1)

Same Patch Batch · makeplane · 2026-10-13 · 3 CVEs total

CVE-2026-102982 8.5 HIGH Plane: XSS in work item comments
CVE-2026-102988 5.3 MEDIUM Plane: ORM Field Injection via Unvalidated `order_by` Parameter (Including Unauthenticated

IV. Related Vulnerabilities

Same product: plane
Same vendor: makeplane
Same weakness: CWE-200

V. Comments for CVE-2026-102981

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