{"id":"CVE-2026-35451","summary":"Twenty: Stored XSS via BlockNote FileBlock","details":"Twenty is an open source CRM. Prior to 1.20.6, a Stored Cross-Site Scripting (XSS) vulnerability exists in the BlockNote editor component. Due to a lack of protocol validation in the FileBlock component and insufficient server-side inspection of block content, an attacker can inject a javascript: URI into the url property of a file block. This allows the execution of arbitrary JavaScript when a user clicks on the malicious file attachment. This vulnerability is fixed in 1.20.6.","aliases":["GHSA-7w89-7q26-gj7q"],"modified":"2026-08-04T11:52:09.030912236Z","published":"2026-04-21T16:22:30.378Z","database_specific":{"cwe_ids":["CWE-79"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35451.json","cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35451.json"},{"type":"ADVISORY","url":"https://github.com/twentyhq/twenty/security/advisories/GHSA-7w89-7q26-gj7q"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-35451"},{"type":"FIX","url":"https://github.com/twentyhq/twenty/commit/8da69e0f77ea820a6845a4c3c025b6af3861d523"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/twentyhq/twenty","events":[{"introduced":"0"},{"fixed":"8d61bb9ae62609486aa18ae6d3e6f65ed19bb1fb"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"1.20.6"}],"source":"AFFECTED_FIELD"}}],"versions":["v1.17.0","v1.20.5","v1.20.4","v1.20.3","v1.20.2","v1.20.0","v1.19.13","v1.19.12","v1.19.11","v1.19.10","v1.19.8","v1.19.7","v1.19.6","v1.19.5","v1.19.4","v1.19.3","v1.19.2","v1.19.1","v1.19.0","v1.16.16","v1.16.15","v1.16.14","v1.16.13","v1.16.10","v1.16.9","v1.16.0","v1.15.10","v1.15.9","v1.15.8","v1.15.7","v1.15.3","v1.15.0","v1.14.2","v1.14.1","v1.14.0","v1.13.11","v1.13.10","v1.13.9","v1.13.8","v1.13.3","v1.13.2","v1.13.1","v1.13.0","v1.12.18","v1.12.17","v1.12.15","v1.12.14","v1.12.13","v1.12.12","v1.12.8","v1.12.7","v1.12.6","v1.12.5","v1.12.4","v1.12.3","v1.12.0","v1.11.14","v1.11.6","v1.11.5","v1.11.4","v1.11.3","v1.11.0","v1.10.7","v1.10.6","v1.10.5","v1.10.4","v1.10.3","v1.10.2","v1.10.0","v1.8.11","v1.8.10","v1.8.9","v1.8.8","v1.8.7","v1.8.6","v1.8.5","v1.8.4","v1.8.3","v1.8.2","v1.8.1","v1.8.0","v1.7.10","v1.7.9","v1.7.8","v1.7.7","v1.7.6","v1.7.3","v1.7.2","v1.7.1","v1.7.0","v1.6.8","v1.6.0","v1.5.0","v1.4.11","v1.4.10","v1.4.9","v1.4.8","v1.4.7","v1.4.5","v1.4.4","v1.4.3","v1.4.2","v1.4.1","v1.4.0","v1.3.1","v1.3.0","v1.2.0","v1.1.0","v1.0.4","v1.0.0","v0.60.7","v0.60.6","v0.60.5","v0.60.4","v0.60.2","v0.55.7","v0.55.5","v0.55.4","v0.55.3","v0.55.2","v0.55.0","v0.54.7","v0.53.7","v0.53.6","v0.53.5","v0.53.4","v0.53.2","v0.53.0","v0.51.11","v0.51.10","v0.44.9","v0.31.0","v0.30.0","v0.24.1","v0.24.0","v0.23.2","v0.23.1","v0.22.1","v0.22.0","v0.21.2","v0.21.0","v0.21","v0.20.2","v0.20.1","v0.20.0","v0.12.2","v0.12.1","v0.12.0","v0.11.3","v0.11.2","v0.11.1","v0.11.0","v0.10.6","v0.10.5","v0.10.4","v0.10.3","v0.10.2","v0.10.1","v0.10.0","v0.4.0","v0.3.3","v0.2.2","v0.2.1","v0.1.4","v0.1.3","v0.1.2","v0.1.1","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-35451.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N"}]}