---
id: CVE-2026-104979
title: Plane is an open-source project management tool
summary: >-
  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 …
severity: high
cvss: 8.7
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N'
cwe:
  - CWE-79
  - CWE-862
vendor: makeplane
product: plane
affected:
  - plane < 1.4.0
published: '2026-10-05'
updated: '2026-10-05'
sourceUpdated: '2026-10-05T18:17:33.563'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-104979'
references:
  - url: >-
      https://github.com/makeplane/plane/commit/0d58adb69d859fc94c43b9d68fadd77e810d5ed1
    label: security-advisories@github.com
  - url: 'https://github.com/makeplane/plane/pull/9287'
    label: security-advisories@github.com
  - url: 'https://github.com/makeplane/plane/releases/tag/v1.4.0'
    label: security-advisories@github.com
  - url: 'https://github.com/makeplane/plane/security/advisories/GHSA-hh2r-3hwp-mvq3'
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-05T18:29:11.198Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.