diff --git a/CHANGELOG.md b/CHANGELOG.md
index 87d34909d..9c62779c3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -24,6 +24,10 @@
 
 ### Fixed
 
+* [PostIt] Les liens Markdown des pièces jointes utilisent désormais
+  le même filtre de nom que l'upload serveur, avant l'encodage URL.
+  Le libellé conserve le nom original, notamment ses accents.
+
 * [Yavsc.Abstract][Yavsc.Blogs] Encodage des caractères non supportés
   dans les noms de fichiers téléversés avec `_` au lieu de `#`, pour
   éviter les fragments d'URL et permettre le téléchargement via les
diff --git a/src/PostIt/PostIt.Tests/BlogAttachmentLinkTests.cs b/src/PostIt/PostIt.Tests/BlogAttachmentLinkTests.cs
index 946d3d28e..6c88e9412 100644
--- a/src/PostIt/PostIt.Tests/BlogAttachmentLinkTests.cs
+++ b/src/PostIt/PostIt.Tests/BlogAttachmentLinkTests.cs
@@ -20,8 +20,13 @@ namespace PostIt.Tests;
 /// </summary>
 public class BlogAttachmentLinkTests
 {
-    [Fact]
-    public async Task Save_with_attachment_appends_absolute_link_derived_from_the_oidc_authority()
+    [Theory]
+    [InlineData("note.txt", "note.txt")]
+    [InlineData("INSC_E03686381_SCHNEIDER_000113378AA__Troisi\u00e8me__.PDF",
+        "INSC_E03686381_SCHNEIDER_000113378AA__Troisi_232me__.PDF")]
+    [InlineData("rapport final.pdf", "rapport%20final.pdf")]
+    public async Task Save_with_attachment_appends_absolute_link_derived_from_the_oidc_authority(
+        string originalName, string urlName)
     {
         const string authority = "https://idp.example.test";
 
@@ -53,7 +58,7 @@ public class BlogAttachmentLinkTests
         vm.DraftTitle = "Après";
         vm.DraftArticle = "Contenu modifié.";
         vm.DraftAttachments.Add(new BlogUploadFile(
-            "note.txt",
+            originalName,
             System.Text.Encoding.UTF8.GetBytes("payload test"),
             "text/plain"));
 
@@ -68,12 +73,14 @@ public class BlogAttachmentLinkTests
         var sent = Assert.IsType<System.Func<HttpContent>>(linkPut.body);
         var multipartContent = Assert.IsType<MultipartFormDataContent>(sent());
 
-        var expectedUrl = $"{authority}/files/tester/blogs/42/note.txt";
-        var sentStringContent =  multipartContent.First() as StringContent ;
+        var expectedUrl = $"{authority}/files/tester/blogs/42/{urlName}";
+        var sentStringContent = Assert.IsType<StringContent>(multipartContent.First());
 
         var sentString = await sentStringContent.ReadAsStringAsync(TestContext.Current.CancellationToken);
-        Assert.Contains($"- [note.txt]({expectedUrl})", sentString);
+        using var document = System.Text.Json.JsonDocument.Parse(sentString);
+        var article = document.RootElement.GetProperty("article").GetString();
+        Assert.Contains($"- [{originalName}]({expectedUrl})", article);
         // The regression shape: a relative, authority-less link.
-        Assert.DoesNotContain("](/files/", sentString);
+        Assert.DoesNotContain("](/files/", article);
     }
 }
diff --git a/src/PostIt/PostIt/ViewModels/Blogs/BlogsViewModel.cs b/src/PostIt/PostIt/ViewModels/Blogs/BlogsViewModel.cs
index 882b5d19e..cecd5cb2c 100644
--- a/src/PostIt/PostIt/ViewModels/Blogs/BlogsViewModel.cs
+++ b/src/PostIt/PostIt/ViewModels/Blogs/BlogsViewModel.cs
@@ -10,6 +10,7 @@ using Microsoft.Extensions.DependencyInjection;
 using Yavsc.Blogspot;
 using Yavsc.Api.Client;
 using Yavsc.Abstract.Files;
+using Yavsc.Server.Helpers;
 using AvaloniaEdit.Document;
 
 namespace PostIt.ViewModels;
@@ -611,7 +612,8 @@ public partial class BlogsViewModel : ViewModelBase, IActionStatusViewModel
 
         foreach (var attachment in attachments)
         {
-            var relativePath = $"{EscapePathSegment(ownerSegment)}/blogs/{post.Id}/{EscapePathSegment(attachment.FileName)}";
+            var storedName = AbstractFileSystemHelpers.FilterFileName(attachment.FileName);
+            var relativePath = $"{EscapePathSegment(ownerSegment)}/blogs/{post.Id}/{EscapePathSegment(storedName)}";
             var fileUrl = ResolveUserFileUrl(relativePath);
             var markdownLine = $"- [{attachment.FileName}]({fileUrl})";
 
@@ -636,7 +638,7 @@ public partial class BlogsViewModel : ViewModelBase, IActionStatusViewModel
         if (!string.IsNullOrWhiteSpace(authority)
             && Uri.TryCreate(authority, UriKind.Absolute, out var baseUri))
         {
-            return FileServerUrlHelpers.GetUserFilesUri(baseUri, relativePath).ToString();
+            return FileServerUrlHelpers.GetUserFilesUri(baseUri, relativePath).AbsoluteUri;
         }
 
         return $"{Yavsc.Constants.UserFilesPath}/{relativePath}";