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CVE-2026-126814 blueprintUE Self-Hosted Edition before 4.3.6 Arbitrary Iframe Embedding via PeerTube Matcher

4.8 mediumEPSS 0.3%

Medium (4.8) in blueprintue blueprintue-self-hosted-edition. EPSS 0.3% estimated probability of exploitation activity in the next 30 days.

On this page
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.

Severity

CVSS 4.0

4.8 medium
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

CVSS 3.1

3.5 low
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
EPSS
0.3% estimated probability of exploitation activity in the next 30 days; 17th percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
CISA's assessment (SSVC)
Exploitation: PoC · Automatable: no · Technical impact: partial, assessed 2026-11-13. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
CWE
CWE-829 Inclusion of Functionality from Untrusted Control Sphere
OWASP Top 10
A08:2025 Software or Data Integrity Failures
Published
Modified
Assigned by
VulnCheck (CNA)
NVD analysis
Deferred: the NVD does not plan to analyze it
Record from
the NVD, synced

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CVE-2026-126814

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Affected

Versions

From the CNA's record in the CVE List.

ProductAffected
blueprintue-self-hosted-editionfrom 1.0.0 before 4.3.6

Attack patterns (CAPEC)

The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits. More on the page of CWE-829 (13).

History

  1. The NVD deferred its analysis

Changes since this site first stored the record. The same for every record: /api/public/changes.

References

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