CVE WatchOct 5, 2026

CVE-2026-104979

Plane is an open-source project management tool. Prior to 1.4.0, IntakeIssuePublicViewSet.create in Plane v1.3.1 writes description_html thr

CVSS

8.7

High

EPSS

0.4%

p28

KEV

—

Exploit Today

0-100

Published: Oct 5, 2026 · Last modified: Oct 5, 2026 · CWE-79 · CWE-862

EPSS · 30d

0.4%EPSS · 30 days0.4%

2026-10-062026-10-21

Technical description

Plane is an open-source project management tool. Prior to 1.4.0, IntakeIssuePublicViewSet.create in Plane v1.3.1 writes description_html through Issue.objects.create(...) without calling validate_html_content from nh3. Any authenticated user, including a new user with no workspace memberships, can plant arbitrary HTML in a project that has a published DeployBoard with intake enabled. When a project member or viewer of a closed intake item clicks the planted link, the TipTap \tjavascript: parser bypass and the target="_self" click handler execute JavaScript in the viewer's session and exfiltrate a long-lived API token. This issue is fixed in 1.4.0.

Official references

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