diff --git a/go.mod b/go.mod
index f44161f..bba73a3 100644
--- a/go.mod
+++ b/go.mod
@@ -4,6 +4,7 @@ go 1.21
 
 require (
 	github.com/ezamriy/gorpm v0.0.0-20160905202458-25f7273cbf51
+	github.com/google/go-cmp v0.6.0
 	github.com/hashicorp/go-version v1.7.0
 	github.com/mattn/go-sqlite3 v1.14.22
 	github.com/pkg/errors v0.9.1
diff --git a/go.sum b/go.sum
index 74e90ea..2265ef3 100644
--- a/go.sum
+++ b/go.sum
@@ -1,6 +1,8 @@
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/hashicorp/go-version v1.7.0 h1:5tqGy27NaOTB8yJKUZELlFAS/LTKJkrmONwQKeRZfjY=
 github.com/hashicorp/go-version v1.7.0/go.mod h1:fltr4n8CU8Ke44wwGCBoEymUuxUHl09ZGVZPK5anwXA=
 github.com/mattn/go-sqlite3 v1.14.22 h1:2gZY6PC6kBnID23Tichd1K+Z0oS6nE/XwU+Vz/5o4kU=
diff --git a/vmaas/vulnerabilities.go b/vmaas/vulnerabilities.go
index 083a254..c9a8f60 100644
--- a/vmaas/vulnerabilities.go
+++ b/vmaas/vulnerabilities.go
@@ -6,6 +6,7 @@ import (
 	"sort"
 	"time"
 
+	"github.com/google/go-cmp/cmp"
 	"github.com/hashicorp/go-version"
 	"github.com/pkg/errors"
 	"github.com/redhatinsights/vmaas-lib/vmaas/utils"
@@ -186,7 +187,14 @@ func evaluate(c *Cache, opts *options, request *Request) (*VulnerabilitiesCvesDe
 
 func evaluateUnpatchedCves(c *Cache, products []ProductsPackage, cves *VulnerabilitiesCvesDetails) {
 	for _, pp := range products {
+		seenProducts := make(map[CSAFProduct]bool, len(pp.ProductsUnfixed))
 		for _, product := range pp.ProductsUnfixed {
+			if seenProducts[product] {
+				// duplicate product in pp.ProductsUnfixed
+				// skip processing of already processed product
+				continue
+			}
+			seenProducts[product] = true
 			module := product.ModuleStream
 			cn := CpeIDNameID{CpeID: product.CpeID, NameID: product.PackageNameID}
 			csafCves := c.CSAFCVEs[cn][product]
@@ -210,7 +218,14 @@ func evaluateUnpatchedCves(c *Cache, products []ProductsPackage, cves *Vulnerabi
 func evaluateManualCves(c *Cache, products []ProductsPackage, cves *VulnerabilitiesCvesDetails) {
 	for _, pp := range products {
 		pp := pp // make copy because &pp is used
+		seenProducts := make(map[CSAFProduct]bool, len(pp.ProductsFixed))
 		for _, product := range pp.ProductsFixed {
+			if seenProducts[product] {
+				// duplicate product in pp.ProductsFixed
+				// skip processing of already processed product
+				continue
+			}
+			seenProducts[product] = true
 			updateNevra := pkgID2Nevra(c, product.PackageID)
 			if !isApplicable(c, &updateNevra, &pp.Package.Nevra) {
 				continue
@@ -766,7 +781,21 @@ func updateCves(cves map[string]VulnerabilityDetail, cve string, pkg Package, er
 			affectedPackage.ModuleStreamPtrs.Module = &module.Module
 			affectedPackage.ModuleStreamPtrs.Stream = &module.Stream
 		}
-		vulnDetail.Affected = append(vulnDetail.Affected, affectedPackage)
+		vulnDetail.Affected = appendUniq(vulnDetail.Affected, &affectedPackage)
 	}
 	cves[cve] = vulnDetail
 }
+
+func appendUniq(affected []AffectedPackage, item *AffectedPackage) []AffectedPackage {
+	if item == nil {
+		return affected
+	}
+
+	for _, a := range affected {
+		if cmp.Equal(a, *item) {
+			return affected
+		}
+	}
+	affected = append(affected, *item)
+	return affected
+}