Low severity3.5NVD Advisory· Published Nov 11, 2026
CVE-2026-126814
CVE-2026-126814
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.
Affected products
2(expand)+ 1 more
- (no CPE)
- (no CPE)range: <4.3.6
Patches
Vulnerability mechanics
References
6- github.com/blueprintue/blueprintue-self-hosted-edition/blob/v4.3.5/app/services/www/BlueprintService.phpnvd
- github.com/blueprintue/blueprintue-self-hosted-edition/commit/5f13e2bb8cd4c620899e9f8afd41a6e62b3bc6a4nvd
- github.com/blueprintue/blueprintue-self-hosted-edition/pull/269nvd
- github.com/blueprintue/blueprintue-self-hosted-edition/releases/tag/v4.3.6nvd
- github.com/blueprintue/blueprintue-self-hosted-edition/security/advisories/GHSA-3vgc-fcfg-v233nvd
- www.vulncheck.com/advisories/blueprintue-self-hosted-edition-before-4.3.6-arbitrary-iframe-embedding-via-peertube-matchernvd
News mentions
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