diff --git a/cvetools/cvesearch.go b/cvetools/cvesearch.go
index 4648502e..777a90c9 100644
--- a/cvetools/cvesearch.go
+++ b/cvetools/cvesearch.go
@@ -303,6 +303,9 @@ func (cv *ScanTools) ScanImage(ctx context.Context, req *share.ScanImageRequest,
 
 			rc := scan.NewRegClient(baseReg, req.Token, req.Username, req.Password, req.Proxy, new(httptrace.NopTracer))
 			info, errCode = rc.GetImageInfo(ctx, baseRepo, baseTag, registry.ManifestRequest_Default)
+			if errCode == share.ScanErrorCode_ScanErrImageNotFound {
+				info, errCode = rc.GetImageInfo(ctx, baseRepo, baseTag, registry.ManifestRequest_CosignSignature)
+			}
 			if errCode != share.ScanErrorCode_ScanErrNone {
 				result.Error = errCode
 				return result, nil
@@ -317,6 +320,9 @@ func (cv *ScanTools) ScanImage(ctx context.Context, req *share.ScanImageRequest,
 
 		rc := scan.NewRegClient(req.Registry, req.Token, req.Username, req.Password, req.Proxy, new(httptrace.NopTracer))
 		info, errCode = rc.GetImageInfo(ctx, req.Repository, req.Tag, registry.ManifestRequest_Default)
+		if errCode == share.ScanErrorCode_ScanErrImageNotFound {
+			info, errCode = rc.GetImageInfo(ctx, req.Repository, req.Tag, registry.ManifestRequest_CosignSignature)
+		}
 		if errCode != share.ScanErrorCode_ScanErrNone {
 			result.Error = errCode
 			return result, nil