{"id":"CVE-2026-126814","summary":"blueprintUE Self-Hosted Edition before 4.3.6 Arbitrary Iframe Embedding via PeerTube Matcher","details":"blueprintUE Self-Hosted Edition before 4.3.6 contains an iframe injection vulnerability that allows authenticated users to embed arbitrary third-party content by abusing the PeerTube video URL matcher in BlueprintService::findVideoProvider(). Attackers can set a blueprint video URL on an attacker-controlled host, which site.js loads in an unsandboxed iframe after consent, framing fake login forms or malware downloads.","aliases":["GHSA-3vgc-fcfg-v233"],"modified":"2026-11-14T02:30:26.904441665Z","published":"2026-11-11T20:53:14.311Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-829"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/126xxx/CVE-2026-126814.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/126xxx/CVE-2026-126814.json"},{"type":"ADVISORY","url":"https://github.com/blueprintue/blueprintue-self-hosted-edition/releases/tag/v4.3.6"},{"type":"ADVISORY","url":"https://github.com/blueprintue/blueprintue-self-hosted-edition/security/advisories/GHSA-3vgc-fcfg-v233"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-126814"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/blueprintue-self-hosted-edition-before-4.3.6-arbitrary-iframe-embedding-via-peertube-matcher"},{"type":"FIX","url":"https://github.com/blueprintue/blueprintue-self-hosted-edition/commit/5f13e2bb8cd4c620899e9f8afd41a6e62b3bc6a4"},{"type":"FIX","url":"https://github.com/blueprintue/blueprintue-self-hosted-edition/pull/269"},{"type":"ARTICLE","url":"https://github.com/blueprintue/blueprintue-self-hosted-edition/blob/v4.3.5/app/services/www/BlueprintService.php#L700-L716"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/blueprintue/blueprintue-self-hosted-edition","events":[{"introduced":"52325d2c93c2bc5a2ee2b7d2f1fa45d345e3d610"},{"fixed":"5f13e2bb8cd4c620899e9f8afd41a6e62b3bc6a4"}],"database_specific":{"extracted_events":[{"source":"AFFECTED_FIELD","strategy":"StandardRange","range":[{"introduced":"1.0.0"},{"fixed":"4.3.6"}]},{"range":[{"fixed":"5f13e2bb8cd4c620899e9f8afd41a6e62b3bc6a4"}],"source":"REFERENCES_COMMIT"},{"original_tag":"v4.3.6","range":[{"fixed":"5f13e2bb8cd4c620899e9f8afd41a6e62b3bc6a4"}],"source":"REFERENCES_TAG"},{"range":[{"introduced":"0"},{"fixed":"4.3.6"}],"source":"DESCRIPTION"}]}}],"versions":["v4.3.5","v4.3.4","v4.3.3","v4.3.2","v4.3.1","v4.3.0","v4.2.0","v4.1.2","v4.1.1","v4.1.0","v4.0.0","v3.2.0","v3.1.0","v3.0.0","v2.1.0","v2.0.1","v2.0.0","v1.0.6","v1.0.5","v1.0.4","v1.0.3","v1.0.2","v1.0.1","v1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-126814.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"}]}