VAST-4.1-js-resource-https
VAST-4.1-js-resource-https
OMID <JavaScriptResource> URL should use HTTPS
WarningSecurityIAB VAST 4.1 §2.3VAST 4.1, 4.2, and 4.3
Short answer
Verification scripts loaded over plain HTTP are blocked by mixed-content policies on secure inventory, so measurement silently fails. Serve the <JavaScriptResource> URL over HTTPS.
Why this matters in production
This rule is a strong risk signal. Tags with this issue often still parse, but they become brittle across SDKs, SSAI resolvers, and CTV environments. Security rules show up most often on mobile, CTV, and browser runtimes that enforce HTTPS, mixed-content blocking, or stricter asset loading than desktop test environments. Affected scope: VAST 4.1, 4.2, and 4.3.
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VAST-4.1-js-resource-https and other issues instantly.Open the VAST tag validator →Other Security rules
VAST-2.0-mediafile-https<MediaFile> URL uses HTTP instead of HTTPSVAST-2.0-tracking-httpsTracking or click URL uses HTTP instead of HTTPSVAST-2.0-url-emptyURL field is emptyVAST-2.0-url-invalidURL field does not appear to be a valid URIVAST-4.1-exec-resource-httpsOMID <ExecutableResource> reference should use HTTPS when it is a URL