CVE-2026-105632

high

Description

Plane is an open-source project management tool. Prior to 1.4.0, the GraphQL joinProject mutation lets any workspace member add themselves to any project in that workspace including network=0 (secret/private) projects they were never invited to and grants them a full Member role (read + write). The resolver checks only workspace-level membership/role and never checks the target project's visibility (network). This collapses project-level tenant isolation within a workspace: a low-privilege member can read and modify confidential data in every private project. This issue is fixed in 1.4.0.

References

https://github.com/makeplane/plane/security/advisories/GHSA-45hc-q4mw-jhxm

https://github.com/makeplane/plane/releases/tag/v1.4.0

https://github.com/makeplane/plane/pull/9333

https://github.com/makeplane/plane/commit/e1ef42023ab66b5e722a8750e1bc5ba0d413a3ee

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-92546

Details

Source: Mitre, NVD

Published: 2026-10-05

Updated: 2026-10-05

Risk Information

CVSS v2

Base Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 8.1

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Severity: High

CVSS v4

Base Score: 8.7

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

Severity: High

EPSS

EPSS: 0.00312