diff --git a/pipelines/tekton-bundle-builder-oci-ta/README.md b/pipelines/tekton-bundle-builder-oci-ta/README.md
index a28188ac8d..c732c129d3 100644
--- a/pipelines/tekton-bundle-builder-oci-ta/README.md
+++ b/pipelines/tekton-bundle-builder-oci-ta/README.md
@@ -122,6 +122,7 @@
 |CONTEXT| Path to the directory to use as context.| .| '$(params.path-context)'|
 |HOME| Value for the HOME environment variable.| /tekton/home| |
 |IMAGE| Reference of the image task will produce.| None| '$(params.output-image)'|
+|PARAM_DEFAULTS| Optional space-separated list of PARAM_NAME=VALUE entries. Each entry sets the default value of the named param in the task YAML files.| ""| |
 |REVISION| Revision| None| '$(params.revision)'|
 |SOURCE_ARTIFACT| The Trusted Artifact URI pointing to the artifact with the application source code.| None| '$(tasks.prefetch-dependencies.results.SOURCE_ARTIFACT)'|
 |STEPS_IMAGE| An optional image to configure task steps with in the bundle| ""| |
diff --git a/pipelines/tekton-bundle-builder/README.md b/pipelines/tekton-bundle-builder/README.md
index f77f145a94..b59fccca1a 100644
--- a/pipelines/tekton-bundle-builder/README.md
+++ b/pipelines/tekton-bundle-builder/README.md
@@ -116,6 +116,7 @@
 |CONTEXT| Path to the directory to use as context.| .| '$(params.path-context)'|
 |HOME| Value for the HOME environment variable.| /tekton/home| |
 |IMAGE| Reference of the image task will produce.| None| '$(params.output-image)'|
+|PARAM_DEFAULTS| Optional space-separated list of PARAM_NAME=VALUE entries. Each entry sets the default value of the named param in the task YAML files.| ""| |
 |REVISION| Revision| None| '$(params.revision)'|
 |STEPS_IMAGE| An optional image to configure task steps with in the bundle| ""| |
 |STEPS_IMAGE_STEP_NAMES| Optional comma- or space-separated step names to control which steps are updated with STEPS_IMAGE. If names are prefixed with ! then all steps except those are updated. Otherwise only the listed steps are updated. If empty, all step images are updated.| ""| |
diff --git a/task/tkn-bundle-oci-ta/0.2/README.md b/task/tkn-bundle-oci-ta/0.2/README.md
index f8b9ce5b21..eb107a0788 100644
--- a/task/tkn-bundle-oci-ta/0.2/README.md
+++ b/task/tkn-bundle-oci-ta/0.2/README.md
@@ -8,6 +8,7 @@ Creates and pushes a Tekton bundle containing the specified Tekton YAML files.
 |CONTEXT|Path to the directory to use as context.|.|false|
 |HOME|Value for the HOME environment variable.|/tekton/home|false|
 |IMAGE|Reference of the image task will produce.||true|
+|PARAM_DEFAULTS|Optional space-separated list of PARAM_NAME=VALUE entries. Each entry sets the default value of the named param in the task YAML files.|""|false|
 |REVISION|Revision||true|
 |SOURCE_ARTIFACT|The Trusted Artifact URI pointing to the artifact with the application source code.||true|
 |STEPS_IMAGE|An optional image to configure task steps with in the bundle|""|false|
diff --git a/task/tkn-bundle-oci-ta/0.2/tkn-bundle-oci-ta.yaml b/task/tkn-bundle-oci-ta/0.2/tkn-bundle-oci-ta.yaml
index 565ebd24a8..535abac495 100644
--- a/task/tkn-bundle-oci-ta/0.2/tkn-bundle-oci-ta.yaml
+++ b/task/tkn-bundle-oci-ta/0.2/tkn-bundle-oci-ta.yaml
@@ -7,7 +7,7 @@ metadata:
     tekton.dev/pipelines.minVersion: 0.12.1
     tekton.dev/tags: image-build, konflux
   labels:
-    app.kubernetes.io/version: 0.2.2
+    app.kubernetes.io/version: 0.2.3
     build.appstudio.redhat.com/build_type: tkn-bundle
 spec:
   description: Creates and pushes a Tekton bundle containing the specified
@@ -24,6 +24,12 @@ spec:
     - name: IMAGE
       description: Reference of the image task will produce.
       type: string
+    - name: PARAM_DEFAULTS
+      description: Optional space-separated list of PARAM_NAME=VALUE entries.
+        Each entry sets the default value of the named param in the task YAML
+        files.
+      type: string
+      default: ""
     - name: REVISION
       description: Revision
       type: string
@@ -83,6 +89,8 @@ spec:
           value: $(params.STEPS_IMAGE)
         - name: STEPS_IMAGE_STEP_NAMES
           value: $(params.STEPS_IMAGE_STEP_NAMES)
+        - name: PARAM_DEFAULTS
+          value: $(params.PARAM_DEFAULTS)
       script: |
         #!/bin/env bash
         set -o errexit
@@ -194,6 +202,31 @@ spec:
           done
         fi
 
+        # Allow default values for params in the task being built to be set at build time
+        # PARAM_DEFAULTS should be a space-separated list of `PARAM_NAME=default_value` pairs.
+        if [[ -n "${PARAM_DEFAULTS}" ]]; then
+          set -f
+          IFS=' ' read -r -a PD_ENTRIES <<<"${PARAM_DEFAULTS}"
+          set +f
+          for entry in "${PD_ENTRIES[@]}"; do
+            if [[ "${entry}" != *"="* ]]; then
+              echo "ERROR: invalid PARAM_DEFAULTS entry '${entry}', expected NAME=VALUE format" >&2
+              exit 1
+            fi
+            PARAM_NAME="${entry%%=*}"
+            PARAM_VALUE="${entry#*=}"
+            for f in "${FILES[@]}"; do
+              if ! PARAM_NAME="${PARAM_NAME}" yq -e '.spec.params[]? | select(.name == strenv(PARAM_NAME))' "$f" &>/dev/null; then
+                echo "Param '${PARAM_NAME}' does not exist in task file '${f##*/}', skipping" >&2
+                continue
+              fi
+              echo "Setting param default: ${PARAM_NAME}=${PARAM_VALUE} in task file '${f##*/}'"
+              PARAM_NAME="${PARAM_NAME}" PARAM_VALUE="${PARAM_VALUE}" \
+                yq '(.spec.params[]? | select(.name == strenv(PARAM_NAME)).default) = strenv(PARAM_VALUE)' -i "$f"
+            done
+          done
+        fi
+
         printf "%s\n" "${FILES[@]}" >"${TASK_FILE}"
     - name: build
       image: quay.io/konflux-ci/task-runner:1.5.0@sha256:200019314a50be5b6dd06f362c794c92a700583a522c5eee9a41e3eab7f706c5
diff --git a/task/tkn-bundle-oci-ta/CHANGELOG.md b/task/tkn-bundle-oci-ta/CHANGELOG.md
index eab760d47f..4d3493df47 100644
--- a/task/tkn-bundle-oci-ta/CHANGELOG.md
+++ b/task/tkn-bundle-oci-ta/CHANGELOG.md
@@ -9,6 +9,11 @@ When you make changes without bumping the version right away, document them here
 If that's not something you ever plan to do, consider removing this section.
 -->
 
+## 0.2.3
+
+### Added
+
+Version 0.2.3 supports modifying task parameter default values at build time.
 
 ## 0.2.2
 
diff --git a/task/tkn-bundle/0.2/spec/test1.yaml b/task/tkn-bundle/0.2/spec/test1.yaml
index d235a11e26..dd3606e8eb 100644
--- a/task/tkn-bundle/0.2/spec/test1.yaml
+++ b/task/tkn-bundle/0.2/spec/test1.yaml
@@ -5,6 +5,10 @@ metadata:
     app.kubernetes.io/version: "0.1"
   name: test1
 spec:
+  params:
+    - name: MY_PARAM
+      type: string
+      default: original-value
   steps:
     - name: build
       image: ubuntu
diff --git a/task/tkn-bundle/0.2/spec/tkn-bundle_spec.sh b/task/tkn-bundle/0.2/spec/tkn-bundle_spec.sh
index baa3f0fa6d..95ba1da425 100644
--- a/task/tkn-bundle/0.2/spec/tkn-bundle_spec.sh
+++ b/task/tkn-bundle/0.2/spec/tkn-bundle_spec.sh
@@ -354,6 +354,21 @@ spec:
     The output should include 'TASK_FAILED=Failed'
   End
 
+  It 'sets param defaults with PARAM_DEFAULTS'
+    build_and_inspect_param_defaults() {
+      restore_source_files
+      tkn task start tkn-bundle -p IMAGE=registry:5000/bundle:param-defaults -p "PARAM_DEFAULTS=MY_PARAM=custom-value" -p URL=https://example.com -p REVISION=main --use-param-defaults --timeout 15m --showlog -w name=source,claimName=source-pvc
+      tkn bundle list -o=go-template --template '{{range .spec.params}}{{printf "%s=%s\n" .name .default}}{{end}}' localhost:5000/bundle:param-defaults 2>/dev/null
+    }
+
+    When call build_and_inspect_param_defaults
+    The output should include 'Setting param default: MY_PARAM=custom-value'
+    The output should include 'Added Task: test1 to image'
+    The output should include 'Pushed Tekton Bundle to registry:5000/bundle'
+    The output should include 'MY_PARAM=custom-value'
+    The output should not include 'MY_PARAM=original-value'
+  End
+
   It 'replaces named step images with space-separated STEPS_IMAGE_STEP_NAMES'
     build_and_inspect_space_sep() {
       restore_source_files
@@ -384,5 +399,6 @@ End
   #   tkn bundle list localhost:5000/bundle:exclude-one
   #   tkn bundle list localhost:5000/bundle:exclude-multi
   #   tkn bundle list localhost:5000/bundle:no-match
+  #   tkn bundle list localhost:5000/bundle:param-defaults
   #   tkn bundle list localhost:5000/bundle:space-sep
   # Note: mixed-fail has no bundle — the task fails before pushing.
\ No newline at end of file
diff --git a/task/tkn-bundle/0.2/tkn-bundle.yaml b/task/tkn-bundle/0.2/tkn-bundle.yaml
index c8b76538b1..6fd5d1513e 100644
--- a/task/tkn-bundle/0.2/tkn-bundle.yaml
+++ b/task/tkn-bundle/0.2/tkn-bundle.yaml
@@ -2,7 +2,7 @@ apiVersion: tekton.dev/v1
 kind: Task
 metadata:
   labels:
-    app.kubernetes.io/version: "0.2.2"
+    app.kubernetes.io/version: "0.2.3"
     build.appstudio.redhat.com/build_type: "tkn-bundle"
   annotations:
     tekton.dev/pipelines.minVersion: "0.12.1"
@@ -35,6 +35,12 @@ spec:
       steps except those are updated. Otherwise only the listed steps are
       updated. If empty, all step images are updated.
     default: ""
+  - name: PARAM_DEFAULTS
+    type: string
+    description: >-
+      Optional space-separated list of PARAM_NAME=VALUE entries. Each entry
+      sets the default value of the named param in the task YAML files.
+    default: ""
   - name: URL
     type: string
     description: Source code Git URL
@@ -66,6 +72,8 @@ spec:
       value: $(params.STEPS_IMAGE)
     - name: STEPS_IMAGE_STEP_NAMES
       value: $(params.STEPS_IMAGE_STEP_NAMES)
+    - name: PARAM_DEFAULTS
+      value: $(params.PARAM_DEFAULTS)
     script: |
       #!/bin/env bash
       set -o errexit
@@ -177,6 +185,31 @@ spec:
         done
       fi
 
+      # Allow default values for params in the task being built to be set at build time
+      # PARAM_DEFAULTS should be a space-separated list of `PARAM_NAME=default_value` pairs.
+      if [[ -n "${PARAM_DEFAULTS}" ]]; then
+        set -f
+        IFS=' ' read -r -a PD_ENTRIES <<< "${PARAM_DEFAULTS}"
+        set +f
+        for entry in "${PD_ENTRIES[@]}"; do
+          if [[ "${entry}" != *"="* ]]; then
+            echo "ERROR: invalid PARAM_DEFAULTS entry '${entry}', expected NAME=VALUE format" >&2
+            exit 1
+          fi
+          PARAM_NAME="${entry%%=*}"
+          PARAM_VALUE="${entry#*=}"
+          for f in "${FILES[@]}"; do
+            if ! PARAM_NAME="${PARAM_NAME}" yq -e '.spec.params[]? | select(.name == strenv(PARAM_NAME))' "$f" &>/dev/null; then
+              echo "Param '${PARAM_NAME}' does not exist in task file '${f##*/}', skipping" >&2
+              continue
+            fi
+            echo "Setting param default: ${PARAM_NAME}=${PARAM_VALUE} in task file '${f##*/}'"
+            PARAM_NAME="${PARAM_NAME}" PARAM_VALUE="${PARAM_VALUE}" \
+              yq '(.spec.params[]? | select(.name == strenv(PARAM_NAME)).default) = strenv(PARAM_VALUE)' -i "$f"
+          done
+        done
+      fi
+
       printf "%s\n" "${FILES[@]}" > "${TASK_FILE}"
     workingDir: $(workspaces.source.path)
   - image: quay.io/konflux-ci/task-runner:1.5.0@sha256:200019314a50be5b6dd06f362c794c92a700583a522c5eee9a41e3eab7f706c5
diff --git a/task/tkn-bundle/CHANGELOG.md b/task/tkn-bundle/CHANGELOG.md
index eab760d47f..4d3493df47 100644
--- a/task/tkn-bundle/CHANGELOG.md
+++ b/task/tkn-bundle/CHANGELOG.md
@@ -9,6 +9,11 @@ When you make changes without bumping the version right away, document them here
 If that's not something you ever plan to do, consider removing this section.
 -->
 
+## 0.2.3
+
+### Added
+
+Version 0.2.3 supports modifying task parameter default values at build time.
 
 ## 0.2.2