diff --git a/packages/api-client/src/posthog-client.ts b/packages/api-client/src/posthog-client.ts
index 29c687a4fb..bc33a43596 100644
--- a/packages/api-client/src/posthog-client.ts
+++ b/packages/api-client/src/posthog-client.ts
@@ -4697,6 +4697,34 @@ export class PostHogAPIClient {
     return (await response.json()) as SandboxCustomImage;
   }
 
+  async updateSandboxCustomImage(
+    id: string,
+    input: { name?: string; description?: string },
+  ): Promise<SandboxCustomImage> {
+    const teamId = await this.getTeamId();
+    const url = new URL(
+      `${this.api.baseUrl}/api/projects/${teamId}/sandbox_custom_images/${id}/`,
+    );
+    const response = await this.api.fetcher.fetch({
+      method: "patch",
+      url,
+      path: `/api/projects/${teamId}/sandbox_custom_images/${id}/`,
+      overrides: {
+        body: JSON.stringify(input),
+      },
+    });
+    if (!response.ok) {
+      const errorData = (await response.json().catch(() => ({}))) as {
+        detail?: string;
+      };
+      throw new Error(
+        errorData.detail ??
+          `Failed to update sandbox custom image: ${response.statusText}`,
+      );
+    }
+    return (await response.json()) as SandboxCustomImage;
+  }
+
   async ensureSandboxCustomImageBuilderTask(
     id: string,
   ): Promise<SandboxCustomImage> {
diff --git a/packages/api-client/src/sandbox-custom-images.test.ts b/packages/api-client/src/sandbox-custom-images.test.ts
index 22c97e771b..269bec2716 100644
--- a/packages/api-client/src/sandbox-custom-images.test.ts
+++ b/packages/api-client/src/sandbox-custom-images.test.ts
@@ -69,4 +69,39 @@ describe("PostHogAPIClient sandbox custom images", () => {
       }),
     );
   });
+
+  it.each([
+    ["name only", { name: "renamed" }],
+    ["description only", { description: "updated" }],
+    ["both", { name: "renamed", description: "updated" }],
+  ])("patches %s via updateSandboxCustomImage", async (_name, input) => {
+    const fetch = vi.fn().mockResolvedValue({
+      ok: true,
+      status: 200,
+      json: async () => ({ id: "im-1", ...input }),
+    });
+
+    await makeClient(fetch).updateSandboxCustomImage("im-1", input);
+
+    expect(fetch).toHaveBeenCalledWith(
+      expect.objectContaining({
+        method: "patch",
+        path: `/api/projects/123/sandbox_custom_images/im-1/`,
+        overrides: { body: JSON.stringify(input) },
+      }),
+    );
+  });
+
+  it("throws the backend detail message when update fails", async () => {
+    const fetch = vi.fn().mockResolvedValue({
+      ok: false,
+      status: 400,
+      statusText: "Bad Request",
+      json: async () => ({ detail: "Name cannot be blank." }),
+    });
+
+    await expect(
+      makeClient(fetch).updateSandboxCustomImage("im-1", { name: "  " }),
+    ).rejects.toThrow("Name cannot be blank.");
+  });
 });
diff --git a/packages/ui/src/features/settings/sections/environments/CloudEnvironmentsSettings.tsx b/packages/ui/src/features/settings/sections/environments/CloudEnvironmentsSettings.tsx
index 3ed5b5c390..2252998d4c 100644
--- a/packages/ui/src/features/settings/sections/environments/CloudEnvironmentsSettings.tsx
+++ b/packages/ui/src/features/settings/sections/environments/CloudEnvironmentsSettings.tsx
@@ -296,6 +296,7 @@ export function CloudEnvironmentsSettings() {
     buildMutation,
     builderTaskMutation,
     deleteMutation: deleteImageMutation,
+    updateMutation: updateImageMutation,
   } = useSandboxCustomImages();
   const handleOpenTask = useHandleOpenTask();
   const repoPickerProps = useCloudRepoPicker();
@@ -313,6 +314,10 @@ export function CloudEnvironmentsSettings() {
   const [specDraft, setSpecDraft] = useState("");
   const [deleteConfirmImage, setDeleteConfirmImage] =
     useState<SandboxCustomImage | null>(null);
+  const [renameImage, setRenameImage] = useState<SandboxCustomImage | null>(
+    null,
+  );
+  const [renameName, setRenameName] = useState("");
   const [viewingLogImageId, setViewingLogImageId] = useState<string | null>(
     null,
   );
@@ -456,6 +461,30 @@ export function CloudEnvironmentsSettings() {
     setDeleteConfirmImage(null);
   }, [deleteConfirmImage, deleteImageMutation]);
 
+  const openRenameImage = useCallback((image: SandboxCustomImage) => {
+    setRenameImage(image);
+    setRenameName(image.name);
+  }, []);
+
+  const handleRenameImage = useCallback(async () => {
+    if (!renameImage) return;
+    const name = renameName.trim();
+    if (!name) {
+      toast.error("Name cannot be blank");
+      return;
+    }
+    if (name === renameImage.name) {
+      setRenameImage(null);
+      return;
+    }
+    try {
+      await updateImageMutation.mutateAsync({ id: renameImage.id, name });
+      setRenameImage(null);
+    } catch {
+      // The mutation's onError callback displays the failure toast.
+    }
+  }, [renameImage, renameName, updateImageMutation]);
+
   if (isFormOpen) {
     return (
       <Flex direction="column" gap="4">
@@ -1000,6 +1029,18 @@ export function CloudEnvironmentsSettings() {
                         >
                           Save & build
                         </Button>
+                        <Button
+                          size="1"
+                          variant="ghost"
+                          color="gray"
+                          onClick={() => openRenameImage(image)}
+                          disabled={
+                            deleteImageMutation.isPending ||
+                            updateImageMutation.isPending
+                          }
+                        >
+                          <PencilSimple size={14} />
+                        </Button>
                         <Button
                           size="1"
                           variant="ghost"
@@ -1090,6 +1131,59 @@ export function CloudEnvironmentsSettings() {
               </Flex>
             </AlertDialog.Content>
           </AlertDialog.Root>
+          <AlertDialog.Root
+            open={renameImage !== null}
+            onOpenChange={(open) => {
+              if (!open) setRenameImage(null);
+            }}
+          >
+            <AlertDialog.Content maxWidth="420px" size="1">
+              <AlertDialog.Title className="text-sm">
+                Rename custom image
+              </AlertDialog.Title>
+              <AlertDialog.Description>
+                <Text color="gray" className="text-[13px]">
+                  Updates the display name. The build spec and status are
+                  unchanged.
+                </Text>
+              </AlertDialog.Description>
+              <Flex direction="column" gap="1" mt="3">
+                <Text className="font-medium text-[13px]">Name</Text>
+                <TextField.Root
+                  size="2"
+                  value={renameName}
+                  onChange={(e) => setRenameName(e.target.value)}
+                  placeholder="Image name"
+                  autoFocus
+                  onKeyDown={(e) => {
+                    if (e.key === "Enter" && !updateImageMutation.isPending) {
+                      e.preventDefault();
+                      void handleRenameImage();
+                    }
+                  }}
+                />
+              </Flex>
+              <Flex justify="end" gap="3" mt="3">
+                <AlertDialog.Cancel>
+                  <Button variant="soft" color="gray" size="1">
+                    Cancel
+                  </Button>
+                </AlertDialog.Cancel>
+                <Button
+                  variant="solid"
+                  size="1"
+                  onClick={() => void handleRenameImage()}
+                  loading={updateImageMutation.isPending}
+                  disabled={
+                    !renameName.trim() ||
+                    renameName.trim() === renameImage?.name
+                  }
+                >
+                  Save
+                </Button>
+              </Flex>
+            </AlertDialog.Content>
+          </AlertDialog.Root>
         </>
       )}
     </Flex>
diff --git a/packages/ui/src/features/settings/sections/environments/useSandboxCustomImages.ts b/packages/ui/src/features/settings/sections/environments/useSandboxCustomImages.ts
index c780e55b8d..aa17d0d308 100644
--- a/packages/ui/src/features/settings/sections/environments/useSandboxCustomImages.ts
+++ b/packages/ui/src/features/settings/sections/environments/useSandboxCustomImages.ts
@@ -143,6 +143,37 @@ export function useSandboxCustomImages() {
     },
   );
 
+  const updateMutation = useAuthenticatedMutation(
+    (
+      client,
+      {
+        id,
+        ...input
+      }: { id: string } & {
+        name?: string;
+        description?: string;
+      },
+    ) => client.updateSandboxCustomImage(id, input),
+    {
+      onSuccess: (image) => {
+        toast.success("Custom image updated");
+        // Invalidate rather than setQueryData: the PATCH response may not carry
+        // every field a detail view depends on, so force a refetch to repopulate
+        // the full image instead of overwriting the cache with a partial object.
+        queryClient.invalidateQueries({
+          queryKey: sandboxCustomImageKeys.detail(image.id),
+        });
+        queryClient.invalidateQueries({
+          queryKey: sandboxCustomImageKeys.list,
+        });
+        queryClient.invalidateQueries({ queryKey: sandboxEnvKeys.list });
+      },
+      onError: (error: Error) => {
+        toast.error(error.message || "Failed to update custom image");
+      },
+    },
+  );
+
   return {
     images: images ?? [],
     isLoading,
@@ -152,5 +183,6 @@ export function useSandboxCustomImages() {
     buildMutation,
     builderTaskMutation,
     deleteMutation,
+    updateMutation,
   };
 }