{"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":"2026-10-05T20:17:10.243","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"},{"url":"https://github.com/makeplane/plane/security/advisories/GHSA-hh2r-3hwp-mvq3","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"total","timestamp":"2026-10-05T19:11:49.930509Z"},"ingestedAt":"2026-10-05T18:29:11.198Z","epss":0.00359,"epssPercentile":0.29444,"slug":"CVE-2026-104979","body":"## Overview\n\nPlane 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":60,"depthScoreParts":{"impact":47.8,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":216052,"id":"CVE-2026-104979","ts":1791232422567,"field":"exploit_available","old":"false","new":"true"}]}