Medium severity · published Oct 13, 2026
CVE-2026-102981
Plane: Unauthenticated Workspace Invitation Token Leakage
6.5
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 11% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PL
plane · makeplane
< 1.4.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-102981
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-102981
x_refsource_CONFIRM
https://github.com/makeplane/plane/security/advisories/GHSA-gf48-p6jp-cwc4
x_refsource_MISC
https://github.com/makeplane/plane/pull/9297
x_refsource_MISC
https://github.com/makeplane/plane/commit/6220ba990b2276a1a1979d1d5df68f650b8b47ad
x_refsource_MISC
https://github.com/makeplane/plane/releases/tag/v1.4.0
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