CVE-2026-86174

EUVD-2026-71973
Plane through 1.4.2 fails to validate that issues belong to the deploy board's project in the public comment endpoint. Authenticated attackers can post comments to arbitrary issues across workspaces by supplying an issue_id parameter to the public deploy-board comment endpoint.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
4.3 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Common Weakness Enumeration
References
https://github.com/makeplane/plane
https://github.com/makeplane/plane/blob/v1.4.2/apps/api/plane/space/views/issue.py#L258-L275
https://github.com/makeplane/plane/issues/9441
https://www.vulncheck.com/advisories/plane-through-1.4.2-arbitrary-comment-write-via-public-deploy-board