VAST-2.0-creative-extension-misplaced-element
VAST-2.0-creative-extension-misplaced-element
<CreativeExtension> contains an element that has a dedicated location in the VAST spec
WarningSchemaIAB VAST 2.0 §2VAST 2.0 and later (all versions)
Short answer
Same as VAST-2.0-extension-misplaced-element but for <CreativeExtension> blocks.
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. Schema violations tend to create parser disagreement. One system may recover while another drops the tag entirely, which is why these bugs often show up as environment-specific fill loss. Affected scope: VAST 2.0 and later (all versions).
How to fix
Move the element out of <CreativeExtension> to its canonical location in the VAST tree.
Check your VAST tag for
VAST-2.0-creative-extension-misplaced-element and other issues instantly.Validate a tag →Other Schema rules
VAST-2.0-text-only-elementText-only element contains a child elementVAST-2.0-unknown-attributeElement has an attribute not defined in the VAST specVAST-2.0-inline-unknown-child<InLine> contains an unrecognised child elementVAST-2.0-wrapper-unknown-child<Wrapper> contains an unrecognised child elementVAST-2.0-creatives-unknown-child<Creatives> may only contain <Creative> elementsVAST-2.0-creative-unknown-child<Creative> contains an unrecognised child elementVAST-2.0-linear-unknown-child<Linear> contains an unrecognised child elementVAST-2.0-trackingevents-unknown-child<TrackingEvents> may only contain <Tracking> elements