diff --git a/pkg/blueprint/ca_customizations.go b/pkg/blueprint/ca_customizations.go
new file mode 100644
index 0000000000..b4083dfe4f
--- /dev/null
+++ b/pkg/blueprint/ca_customizations.go
@@ -0,0 +1,5 @@
+package blueprint
+
+type CACustomization struct {
+	Certs []string `json:"certs,omitempty" toml:"certs,omitempty"`
+}
diff --git a/pkg/blueprint/customizations.go b/pkg/blueprint/customizations.go
index d361626f53..28091e8268 100644
--- a/pkg/blueprint/customizations.go
+++ b/pkg/blueprint/customizations.go
@@ -32,6 +32,7 @@ type Customizations struct {
 	Installer          *InstallerCustomization        `json:"installer,omitempty" toml:"installer,omitempty"`
 	RPM                *RPMCustomization              `json:"rpm,omitempty" toml:"rpm,omitempty"`
 	RHSM               *RHSMCustomization             `json:"rhsm,omitempty" toml:"rhsm,omitempty"`
+	CA                 *CACustomization               `json:"ca,omitempty" toml:"ca,omitempty"`
 }
 
 type IgnitionCustomization struct {
@@ -439,3 +440,10 @@ func (c *Customizations) GetRHSM() *RHSMCustomization {
 	}
 	return c.RHSM
 }
+
+func (c *Customizations) GetCA() *CACustomization {
+	if c == nil {
+		return nil
+	}
+	return c.CA
+}
diff --git a/pkg/distro/fedora/images.go b/pkg/distro/fedora/images.go
index c40c42e943..27d900e17b 100644
--- a/pkg/distro/fedora/images.go
+++ b/pkg/distro/fedora/images.go
@@ -226,6 +226,10 @@ func osCustomizations(
 	osc.Files = append(osc.Files, imageConfig.Files...)
 	osc.Directories = append(osc.Directories, imageConfig.Directories...)
 
+	if ca := c.GetCA(); ca != nil {
+		osc.CACerts = ca.Certs
+	}
+
 	return osc, nil
 }
 
diff --git a/pkg/distro/rhel/images.go b/pkg/distro/rhel/images.go
index 884ff24cdb..0ac394db38 100644
--- a/pkg/distro/rhel/images.go
+++ b/pkg/distro/rhel/images.go
@@ -271,6 +271,10 @@ func osCustomizations(
 		osc.NoBLS = *imageConfig.NoBLS
 	}
 
+	if ca := c.GetCA(); ca != nil {
+		osc.CACerts = ca.Certs
+	}
+
 	return osc, nil
 }
 
diff --git a/pkg/manifest/os.go b/pkg/manifest/os.go
index d4b1569c4e..4f1ac0fd94 100644
--- a/pkg/manifest/os.go
+++ b/pkg/manifest/os.go
@@ -1,6 +1,8 @@
 package manifest
 
 import (
+	"crypto/x509"
+	"encoding/pem"
 	"fmt"
 	"path/filepath"
 	"strings"
@@ -22,6 +24,7 @@ import (
 	"github.com/osbuild/images/pkg/platform"
 	"github.com/osbuild/images/pkg/rhsm/facts"
 	"github.com/osbuild/images/pkg/rpmmd"
+	"github.com/sirupsen/logrus"
 )
 
 // OSCustomizations encapsulates all configuration applied to the base
@@ -139,6 +142,8 @@ type OSCustomizations struct {
 	Directories []*fsnode.Directory
 	Files       []*fsnode.File
 
+	CACerts []string
+
 	FIPS bool
 
 	// NoBLS configures the image bootloader with traditional menu entries
@@ -863,9 +868,51 @@ func (p *OS) serialize() osbuild.Pipeline {
 		}
 	}
 
+	if len(p.CACerts) > 0 {
+		for _, cc := range p.CACerts {
+			for _, c := range parseCerts(cc) {
+				path := filepath.Join("/etc/pki/ca-trust/source/anchors", filepath.Base(c.SerialNumber.Text(16)))
+				f, err := fsnode.NewFile(path, nil, "root", "root", pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: c.Raw}))
+				if err != nil {
+					panic(err)
+				}
+				pipeline.AddStages(osbuild.GenFileNodesStages([]*fsnode.File{f})...)
+			}
+		}
+		pipeline.AddStage(osbuild.NewCAStageStage())
+	}
+
 	return pipeline
 }
 
+func parseCerts(cert string) []*x509.Certificate {
+	result := make([]*x509.Certificate, 0, 1)
+	block := []byte(cert)
+	var blocks [][]byte
+	for {
+		var certDERBlock *pem.Block
+		certDERBlock, block = pem.Decode(block)
+		if certDERBlock == nil {
+			break
+		}
+
+		if certDERBlock.Type == "CERTIFICATE" {
+			blocks = append(blocks, certDERBlock.Bytes)
+		}
+	}
+
+	for _, block := range blocks {
+		cert, err := x509.ParseCertificate(block)
+		if err != nil {
+			logrus.Warnf("failed to parse certificate, skipping: %s", err)
+			continue
+		}
+		result = append(result, cert)
+	}
+
+	return result
+}
+
 func prependKernelCmdlineStage(pipeline osbuild.Pipeline, kernelOptions string, pt *disk.PartitionTable) osbuild.Pipeline {
 	rootFs := pt.FindMountable("/")
 	if rootFs == nil {
diff --git a/pkg/osbuild/cacert_stage.go b/pkg/osbuild/cacert_stage.go
new file mode 100644
index 0000000000..7948292791
--- /dev/null
+++ b/pkg/osbuild/cacert_stage.go
@@ -0,0 +1,7 @@
+package osbuild
+
+func NewCAStageStage() *Stage {
+	return &Stage{
+		Type: "org.osbuild.pki.update-ca-trust",
+	}
+}
diff --git a/test/configs/all-customizations.json b/test/configs/all-customizations.json
index 67cbd0a40d..48783b3177 100644
--- a/test/configs/all-customizations.json
+++ b/test/configs/all-customizations.json
@@ -173,6 +173,9 @@
             "-----BEGIN PGP PUBLIC KEY BLOCK-----\n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\nWSb6T+gChmYBseZwk/k=\n=DQ3i\n-----END PGP PUBLIC KEY BLOCK-----\n"
           ]
         }
+      ],
+      "ca": [
+        "-----BEGIN CERTIFICATE-----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\nAhEkFozMXwYX73TGbGZ0mawPS5D3v3tYTEmJFf6SnVCmUW1fs57g\n-----END CERTIFICATE-----\n"
       ]
     }
   }