{"affected":[{"defaultStatus":"unaffected","ecosystem":"github","packageName":"blueprintue/blueprintue-self-hosted-edition","product":"blueprintue-self-hosted-edition","source":"CNA: VulnCheck","vendor":"blueprintue","versions":[{"lessThan":"4.3.6","status":"affected","version":"1.0.0","versionType":"semver"}]}],"cveId":"CVE-2026-126814","cwes":["CWE-829"],"description":"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.","epss":{"date":"2026-11-13","percentile":0.17494,"score":0.00257},"exploits":[{"kind":"exploit","source":"ADP: CISA-ADP","url":"https://github.com/blueprintue/blueprintue-self-hosted-edition/security/advisories/GHSA-3vgc-fcfg-v233"}],"kev":null,"metrics":[{"score":4.8,"severity":"medium","source":"CNA: VulnCheck","vector":"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","version":"4.0"},{"score":3.5,"severity":"low","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N","version":"3.1"},{"score":4.8,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","version":"4.0"},{"score":3.5,"severity":"low","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N","version":"3.1"}],"modifiedAt":1794592337281,"publishedAt":1794430394311,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/blueprintue/blueprintue-self-hosted-edition/security/advisories/GHSA-3vgc-fcfg-v233"},{"source":"CNA: VulnCheck","tags":["patch"],"url":"https://github.com/blueprintue/blueprintue-self-hosted-edition/commit/5f13e2bb8cd4c620899e9f8afd41a6e62b3bc6a4"},{"source":"CNA: VulnCheck","tags":["issue-tracking","patch"],"url":"https://github.com/blueprintue/blueprintue-self-hosted-edition/pull/269"},{"source":"CNA: VulnCheck","tags":["release-notes"],"url":"https://github.com/blueprintue/blueprintue-self-hosted-edition/releases/tag/v4.3.6"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/blueprintue/blueprintue-self-hosted-edition/blob/v4.3.5/app/services/www/BlueprintService.php#L700-L716"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/blueprintue-self-hosted-edition-before-4.3.6-arbitrary-iframe-embedding-via-peertube-matcher"},{"source":"ADP: CISA-ADP","tags":["exploit"],"url":"https://github.com/blueprintue/blueprintue-self-hosted-edition/security/advisories/GHSA-3vgc-fcfg-v233"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/blueprintue/blueprintue-self-hosted-edition/blob/v4.3.5/app/services/www/BlueprintService.php#L700-L716"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/blueprintue/blueprintue-self-hosted-edition/commit/5f13e2bb8cd4c620899e9f8afd41a6e62b3bc6a4"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/blueprintue/blueprintue-self-hosted-edition/pull/269"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/blueprintue/blueprintue-self-hosted-edition/releases/tag/v4.3.6"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/blueprintue/blueprintue-self-hosted-edition/security/advisories/GHSA-3vgc-fcfg-v233"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/blueprintue-self-hosted-edition-before-4.3.6-arbitrary-iframe-embedding-via-peertube-matcher"}],"remediation":[{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/blueprintue/blueprintue-self-hosted-edition/commit/5f13e2bb8cd4c620899e9f8afd41a6e62b3bc6a4"},{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/blueprintue/blueprintue-self-hosted-edition/pull/269"}],"revision":"d0fa49f74edda195ee7c7d2de0410030c5a0e81048e38aab99a2d22dcf5cebba","sources":[{"modifiedAt":1794592337281,"name":"CNA: VulnCheck","retrievedAt":1794593368095,"url":"https://www.cve.org/CVERecord?id=CVE-2026-126814"},{"modifiedAt":1794519366743,"name":"NVD","retrievedAt":1794529416143,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-126814"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794593395358,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-126814"}],"ssvc":{"assessedAt":1794592306929,"automatable":"no","exploitation":"poc","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"blueprintUE Self-Hosted Edition before 4.3.6 Arbitrary Iframe Embedding via PeerTube Matcher","updatedAt":1794593395358}