High 8.7Published Oct 5, 2026

CVE-2026-104979Plane: Cross-tenant stored XSS in intake enables account takeover

Updated under an hour ago (2026-10-19 10:00 UTC)

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It affects makeplane plane. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.36%, higher than 28% of scored CVEs.

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Every CVE for makeplane plane

Exploited in the last 30 days

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.

CVSS: 8.7 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Weakness (CWE): CWE-79, CWE-862
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.36% (percentile 28)
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Oct 5, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

makeplane plane makeplane:plane (from the name)	before 1.4.0	CNA record

References

https://github.com/makeplane/plane/security/advisories/GHSA-hh2r-3hwp-mvq3x-refsource-confirm
https://github.com/makeplane/plane/pull/9287x-refsource-misc
https://github.com/makeplane/plane/commit/0d58adb69d859fc94c43b9d68fadd77e810d5ed1x-refsource-misc
https://github.com/makeplane/plane/releases/tag/v1.4.0x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.