diff --git a/.github/docker/local.sh b/.github/docker/local.sh
index 9a4aed898a..376bf26427 100755
--- a/.github/docker/local.sh
+++ b/.github/docker/local.sh
@@ -9,7 +9,7 @@ export S3METADATA=file
 export S3VAULT=scality
 export MPU_TESTING="yes"
 
-export CLOUDSERVER_IMAGE_BEFORE_SSE_MIGRATION=ghcr.io/scality/cloudserver:7.70.66
+export CLOUDSERVER_IMAGE_BEFORE_SSE_MIGRATION=ghcr.io/scality/cloudserver:7.70.63
 export CLOUDSERVER_IMAGE_ORIGINAL=ghcr.io/scality/cloudserver:7.70.70
 
 export VAULT_IMAGE_BEFORE_SSE_MIGRATION=ghcr.io/scality/vault:7.70.31
diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index 2ff158e196..62de266b0e 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -407,10 +407,10 @@ jobs:
       S3BACKEND: file
       S3VAULT: scality
       # Versions before using kms scality arn prefix & sse migration used to seed buckets & objects
-      CLOUDSERVER_VERSION_BEFORE: 7.70.66
+      CLOUDSERVER_VERSION_BEFORE: 7.70.63
       VAULT_VERSION_BEFORE: 7.70.31
       VAULT_VERSION_CURRENT: 7.70.32
-      CLOUDSERVER_IMAGE_BEFORE_SSE_MIGRATION: ghcr.io/${{ github.repository }}:7.70.66
+      CLOUDSERVER_IMAGE_BEFORE_SSE_MIGRATION: ghcr.io/${{ github.repository }}:7.70.63
       VAULT_IMAGE_BEFORE_SSE_MIGRATION: ghcr.io/scality/vault:7.70.31
       CLOUDSERVER_IMAGE: ghcr.io/${{ github.repository }}:${{ github.sha }}
       VAULT_IMAGE: ghcr.io/scality/vault:7.70.32
diff --git a/lib/api/initiateMultipartUpload.js b/lib/api/initiateMultipartUpload.js
index 7bfd3cd66a..6ac4d104f8 100644
--- a/lib/api/initiateMultipartUpload.js
+++ b/lib/api/initiateMultipartUpload.js
@@ -22,6 +22,7 @@ const { setExpirationHeaders } = require('./apiUtils/object/expirationHeaders');
 const { data } = require('../data/wrapper');
 const { setSSEHeaders } = require('./apiUtils/object/sseHeaders');
 const { updateEncryption } = require('./apiUtils/bucket/updateEncryption');
+const kms = require('../kms/wrapper');
 
 /*
 Sample xml response:
@@ -335,6 +336,14 @@ function initiateMultipartUpload(authInfo, request, log, callback) {
                     return next(null, corsHeaders, destinationBucket, objectSSEConfig);
                 }
             ),
+        // If SSE configured, test kms key encryption access, but ignore cipher bundle
+        (corsHeaders, destinationBucket, objectSSEConfig, next) => {
+            if (objectSSEConfig) {
+                return kms.createCipherBundle(objectSSEConfig, log,
+                    err => next(err, corsHeaders, destinationBucket, objectSSEConfig));
+            }
+            return next(null, corsHeaders, destinationBucket, objectSSEConfig);
+        },
     ],
         (error, corsHeaders, destinationBucket, objectSSEConfig) => {
             if (error) {
diff --git a/package.json b/package.json
index 37ef7f851a..4d83bc8ad3 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
   "homepage": "https://github.com/scality/S3#readme",
   "dependencies": {
     "@hapi/joi": "^17.1.0",
-    "arsenal": "git+https://github.com/scality/Arsenal#7.70.47",
+    "arsenal": "git+https://github.com/scality/Arsenal#7.70.48",
     "async": "~2.5.0",
     "aws-sdk": "2.905.0",
     "azure-storage": "^2.1.0",
diff --git a/tests/functional/sse-kms-migration/arnPrefix.js b/tests/functional/sse-kms-migration/arnPrefix.js
index a18bd40e04..7cb19ee5ef 100644
--- a/tests/functional/sse-kms-migration/arnPrefix.js
+++ b/tests/functional/sse-kms-migration/arnPrefix.js
@@ -505,3 +505,163 @@ describe('ensure MPU use good SSE', () => {
         );
     });
 });
+describe('KMS error', () => {
+    const sseConfig = { algo: 'aws:kms', masterKeyId: true };
+    const Bucket = 'bkt-kms-err';
+    const Key = 'obj';
+    const body = 'content';
+
+    let mpuEncrypted;
+    let mpuPlaintext;
+
+    let masterKeyId;
+    let masterKeyArn;
+
+    let expected;
+
+    const expectedKMIP = {
+        code: 'KMS.NotFoundException',
+        msg: (action, keyId) => new RegExp(`^KMS \\(KMIP\\) error for ${action} on ${keyId}\\..*`),
+    };
+    const expectedAWS = {
+        code: 'KMS.KMSInvalidStateException',
+        msg: (_, keyId) => new RegExp(`${keyId} is pending deletion\\.`),
+    };
+    /**
+     * localkms container returns a different error message when the key is pending deletion
+     * as we decrypt without passing the keyId, so we need to handle it separately
+     */
+    const expectedLocalKms = {
+        code: 'KMS.AccessDeniedException',
+        msg: () => new RegExp(
+            'The ciphertext refers to a customer master key that does not exist, ' +
+            'does not exist in this region, or you are not allowed to access\\.'
+        ),
+    };
+    if (helpers.config.backends.kms === 'kmip') {
+        expected = expectedKMIP;
+    } else if (helpers.config.backends.kms === 'aws') {
+        expected = expectedAWS;
+    } else {
+        throw new Error(`Unsupported KMS backend: ${helpers.config.backends.kms}`);
+    }
+
+    function assertKmsError(action, keyId) {
+        return err => {
+            if (helpers.config.backends.kms === 'aws' && action === 'Decrypt') {
+                assert.strictEqual(err.name, expectedLocalKms.code);
+                assert.match(err.message, expectedLocalKms.msg(action, keyId));
+                return true;
+            }
+            assert.strictEqual(err.name, expected.code);
+            assert.match(err.message, expected.msg(action, keyId));
+            return true;
+        };
+    }
+
+    before(async () => {
+        void await helpers.s3.createBucket({ Bucket }).promise();
+
+        await helpers.s3.putObject({
+            ...helpers.putObjParams(Bucket, 'plaintext', {}, null),
+            Body: body,
+        }).promise();
+
+        mpuPlaintext = await helpers.s3.createMultipartUpload(
+            helpers.putObjParams(Bucket, 'mpuPlaintext', {}, null)).promise();
+
+        ({ masterKeyId, masterKeyArn } = await helpers.createKmsKey(log));
+
+        await helpers.putEncryptedObject(Bucket, Key, sseConfig, masterKeyArn, body);
+        // ensure we can decrypt and read the object
+        const obj = await helpers.s3.getObject({ Bucket, Key }).promise();
+        assert.strictEqual(obj.Body.toString(), body);
+
+        mpuEncrypted = await helpers.s3.createMultipartUpload(
+            helpers.putObjParams(Bucket, 'mpuEncrypted', sseConfig, masterKeyArn)).promise();
+
+        // make key unavailable
+        void await helpers.destroyKmsKey(masterKeyArn, log);
+    });
+
+    after(async () => {
+        void await helpers.cleanup(Bucket);
+        if (masterKeyArn) {
+            try {
+                void await helpers.destroyKmsKey(masterKeyArn, log);
+            } catch (e) { void e; }
+            [masterKeyArn, masterKeyId] = [null, null];
+        }
+    });
+
+    const testCases = [
+        {
+            action: 'putObject', kmsAction: 'Encrypt',
+            fct: async ({ masterKeyArn }) =>
+                helpers.putEncryptedObject(Bucket, 'fail', sseConfig, masterKeyArn, body),
+        },
+        {
+            action: 'getObject', kmsAction: 'Decrypt',
+            fct: async () => helpers.s3.getObject({ Bucket, Key }).promise(),
+        },
+        {
+            action: 'copyObject', detail: ' when getting from source', kmsAction: 'Decrypt',
+            fct: async () =>
+                helpers.s3.copyObject({ Bucket, Key: 'copy', CopySource: `${Bucket}/${Key}` }).promise(),
+        },
+        {
+            action: 'copyObject', detail: ' when putting to destination', kmsAction: 'Encrypt',
+            fct: async ({ masterKeyArn }) => helpers.s3.copyObject({
+                Bucket,
+                Key: 'copyencrypted',
+                CopySource: `${Bucket}/plaintext`,
+                ServerSideEncryption: 'aws:kms',
+                SSEKMSKeyId: masterKeyArn,
+            }).promise(),
+        },
+        {
+            action: 'createMPU', kmsAction: 'Encrypt',
+            fct: async ({ masterKeyArn }) => helpers.s3.createMultipartUpload(
+                helpers.putObjParams(Bucket, 'mpuKeyEncryptedFail', sseConfig, masterKeyArn)).promise(),
+        },
+        {
+            action: 'mpu uploadPartCopy', detail: ' when getting from source', kmsAction: 'Decrypt',
+            fct: async ({ mpuPlaintext }) => helpers.s3.uploadPartCopy({
+                UploadId: mpuPlaintext.UploadId,
+                Bucket,
+                Key: 'mpuPlaintext',
+                PartNumber: 1,
+                CopySource: `${Bucket}/${Key}`,
+            }).promise(),
+        },
+        {
+            action: 'mpu uploadPart', detail: ' when putting to destination', kmsAction: 'Encrypt',
+            fct: async ({ mpuEncrypted }) => helpers.s3.uploadPart({
+                UploadId: mpuEncrypted.UploadId,
+                Bucket,
+                Key: 'mpuEncrypted',
+                PartNumber: 1,
+                Body: body,
+            }).promise(),
+        },
+        {
+            action: 'mpu uploadPartCopy', detail: ' when putting to destination', kmsAction: 'Encrypt',
+            fct: async ({ mpuEncrypted }) => helpers.s3.uploadPartCopy({
+                UploadId: mpuEncrypted.UploadId,
+                Bucket,
+                Key: 'mpuEncrypted',
+                PartNumber: 1,
+                CopySource: `${Bucket}/plaintext`,
+            }).promise(),
+        },
+    ];
+
+    testCases.forEach(({ action, kmsAction, fct, detail }) => {
+        it(`${action} should fail with kms error${detail || ''}`, async () => {
+            await assert.rejects(
+                fct({ masterKeyArn, mpuEncrypted, mpuPlaintext }),
+                assertKmsError(kmsAction, masterKeyId),
+            );
+        });
+    });
+});
diff --git a/tests/functional/sse-kms-migration/helpers.js b/tests/functional/sse-kms-migration/helpers.js
index 7dbd37534b..65061939dc 100644
--- a/tests/functional/sse-kms-migration/helpers.js
+++ b/tests/functional/sse-kms-migration/helpers.js
@@ -94,6 +94,8 @@ async function createKmsKey(log) {
     });
 }
 
+const destroyKmsKey = promisify(kms.destroyBucketKey);
+
 async function cleanup(Bucket) {
     await bucketUtil.empty(Bucket);
     await s3.deleteBucket({ Bucket }).promise();
@@ -112,5 +114,6 @@ module.exports = {
     putEncryptedObject,
     getObjectMDSSE,
     createKmsKey,
+    destroyKmsKey,
     cleanup,
 };
diff --git a/yarn.lock b/yarn.lock
index 1492ded08a..4ac777c4bc 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -501,9 +501,9 @@ arraybuffer.slice@~0.0.7:
   optionalDependencies:
     ioctl "^2.0.2"
 
-"arsenal@git+https://github.com/scality/Arsenal#7.70.47":
-  version "7.70.47"
-  resolved "git+https://github.com/scality/Arsenal#6ff3267c33ceee0e4af3aa7757f0a17a5d53db54"
+"arsenal@git+https://github.com/scality/Arsenal#7.70.48":
+  version "7.70.48"
+  resolved "git+https://github.com/scality/Arsenal#bf27689b29293a1f24ff3090720067525f282baa"
   dependencies:
     "@js-sdsl/ordered-set" "^4.4.2"
     "@types/async" "^3.2.12"