diff --git a/Base/Xrpl.BinaryCodec/Enums/Field.Uint8.Generated.cs b/Base/Xrpl.BinaryCodec/Enums/Field.Uint8.Generated.cs
index 28287e34..01a4ca2f 100644
--- a/Base/Xrpl.BinaryCodec/Enums/Field.Uint8.Generated.cs
+++ b/Base/Xrpl.BinaryCodec/Enums/Field.Uint8.Generated.cs
@@ -10,6 +10,7 @@ public partial class Field
         public static readonly Uint8Field Method = new Uint8Field(nameof(Method), 2);
         public static readonly Uint8Field Scale = new Uint8Field(nameof(Scale), 4);
         public static readonly Uint8Field AssetScale = new Uint8Field(nameof(AssetScale), 5);
+        public static readonly Uint8Field LEVersion = new Uint8Field(nameof(LEVersion), 6);
         public static readonly Uint8Field TickSize = new Uint8Field(nameof(TickSize), 16);
         public static readonly Uint8Field UNLModifyDisabling = new Uint8Field(nameof(UNLModifyDisabling), 17);
         public static readonly Uint8Field HookResult = new Uint8Field(nameof(HookResult), 18);
diff --git a/Base/Xrpl.BinaryCodec/Enums/definitions.json b/Base/Xrpl.BinaryCodec/Enums/definitions.json
index 0943aa48..14555c74 100644
--- a/Base/Xrpl.BinaryCodec/Enums/definitions.json
+++ b/Base/Xrpl.BinaryCodec/Enums/definitions.json
@@ -3150,6 +3150,16 @@
         "type": "UInt8"
       }
     ],
+    [
+      "LEVersion",
+      {
+        "isSerialized": true,
+        "isSigningField": true,
+        "isVLEncoded": false,
+        "nth": 6,
+        "type": "UInt8"
+      }
+    ],
     [
       "TickSize",
       {
diff --git a/Base/Xrpl.BinaryCodec/Xrpl.BinaryCodec.csproj b/Base/Xrpl.BinaryCodec/Xrpl.BinaryCodec.csproj
index 770d5a8f..d38c8777 100644
--- a/Base/Xrpl.BinaryCodec/Xrpl.BinaryCodec.csproj
+++ b/Base/Xrpl.BinaryCodec/Xrpl.BinaryCodec.csproj
@@ -13,7 +13,7 @@
     <PackageLicenseExpression>Apache-2.0</PackageLicenseExpression>
     <PackageProjectUrl>https://github.com/StaticBit-io/XrplCSharp</PackageProjectUrl>
     <Title>XrplCSharp</Title>
-    <PackageVersion>10.9.0.0</PackageVersion>
+    <PackageVersion>10.11.0.0</PackageVersion>
   </PropertyGroup>
 
   <PropertyGroup>
diff --git a/CHANGES.md b/CHANGES.md
index 4466a442..2cb96daa 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,6 +1,12 @@
 # Changes
 
 ## 10.11.0.0 08/03/2026
+* **`sfLEVersion` — the Vault ledger entry's schema version** ([rippled #7817](https://github.com/XRPLF/rippled/pull/7817), merged into `develop` 07/30/2026, reported by protocol-watch). `UInt8` nth 6, `SoeDefault` on `ltVAULT`: it marks which accounting scheme a vault follows. Vaults created before cash-basis accounting was activated carry no `LEVersion` at all, and rippled resolves that absence as version 0 rather than an error — so an absent value is meaningful, not missing data:
+  * `definitions.json` + the generated `Field.Uint8` entry. **Both are required**: `definitions.json` is not read at runtime, it is the input to `Tools/GenerateEnums`, so a field added there alone travels nowhere. `TestULEVersion_BinaryRoundTrip` is what proves the round trip actually works rather than that the JSON was edited
+  * `LOVault.LEVersion` (`uint?`, matching the other UInt8 fields of that object) plus a `VaultVersion` enum naming the two values the protocol defines so far (`Legacy` = 0, `CashBasis` = 1)
+  * `TestULOVault_LEVersion_Deserialize` covers both shapes — the field present, and a legacy vault without it deserializing to `null`
+  * `Xrpl.BinaryCodec` bumped to **10.11.0.0**, aligned with `Xrpl` rather than to its own next minor (10.10.0.0): the codec ships the field, so the two move together and a consumer can read one version number off both. 10.10.x is simply skipped — the codec's last published version is 10.9.0, so no number is being reused. `Xrpl.AddressCodec` and `Xrpl.Keypairs` are untouched and keep 10.9.0.0
+
 * **Ledger-object flags the protocol declares but the models never named** — an unnamed bit still arrives in the model as a number, so reading the object kept working and only the consumer's ability to test it by name was lost. That is why these went unnoticed; a field-by-field diff of rippled `LedgerFormats.h` (tag `3.3.0-rc1`) against every flag enum found four gaps:
   * `MPTokenIssuanceFlags` + **`MPTCanHoldConfidentialBalance`** (0x80) — introduced by ConfidentialTransfer. The rest of the amendment was already complete (transactions 85–89, `IssuerEncryptionKey`/`AuditorEncryptionKey`, `ConfidentialOutstandingAmount`); only the flag had no name. Value confirmed against a live node: `MPTokenIssuanceSet` with `MutableFlags = tmfMPTSetCanHoldConfidentialBalance` moves the issuance from `Flags = 0` to `Flags = 128`
   * `MPTokenFlags` + **`lsfMPTAMM`** (0x4) — a much older gap: the flag is present as far back as 3.2.1. `AMMCreate` sets it together with `lsfMPTAuthorized` to implicitly authorize an MPT asset for the AMM pseudo-account
diff --git a/Tests/Xrpl.Tests/Models/TestUProtocolCompleteness.cs b/Tests/Xrpl.Tests/Models/TestUProtocolCompleteness.cs
index 367382b5..1a27dbcc 100644
--- a/Tests/Xrpl.Tests/Models/TestUProtocolCompleteness.cs
+++ b/Tests/Xrpl.Tests/Models/TestUProtocolCompleteness.cs
@@ -322,5 +322,47 @@ public void TestULORippleState_SponsorFields_Deserialize()
             Assert.AreEqual(Account1, state.HighSponsor);
             Assert.AreEqual(Account2, state.LowSponsor);
         }
+
+        [TestMethod]
+        public void TestULOVault_LEVersion_Deserialize()
+        {
+            string json = JsonSerializer.Serialize(new Dictionary<string, object>
+            {
+                ["LedgerEntryType"] = "Vault",
+                ["Account"] = Account1,
+                ["Owner"] = Account2,
+                ["ShareMPTID"] = "00000001A407AF5856CCF3C42619DAA925813FC955C72983",
+                ["WithdrawalPolicy"] = 1,
+                ["Scale"] = 6,
+                ["LEVersion"] = (uint)VaultVersion.CashBasis,
+            });
+            LOVault vault = JsonSerializer.Deserialize<LOVault>(json, XrplJsonOptions.Default);
+            Assert.AreEqual((uint)VaultVersion.CashBasis, vault.LEVersion);
+
+            // A vault created before cash-basis accounting carries no LEVersion at all;
+            // rippled resolves that absence as VaultVersion.Legacy rather than an error
+            string legacy = JsonSerializer.Serialize(new Dictionary<string, object>
+            {
+                ["LedgerEntryType"] = "Vault",
+                ["Account"] = Account1,
+                ["Owner"] = Account2,
+            });
+            Assert.IsNull(JsonSerializer.Deserialize<LOVault>(legacy, XrplJsonOptions.Default).LEVersion);
+        }
+
+        [TestMethod]
+        public void TestULEVersion_BinaryRoundTrip()
+        {
+            // The field only travels if definitions.json knows it — this fails with an
+            // encoding error, not an assertion, when the entry is missing.
+            // Parsed from text rather than built from int literals: that is the shape a
+            // node response arrives in, and Uint8.FromJson takes a byte, not an Int32
+            JsonObject json = JsonNode.Parse("""{"LEVersion":1,"Scale":6}""")!.AsObject();
+            string blob = XrplBinaryCodec.Encode(json);
+            JsonObject decoded = XrplBinaryCodec.Decode(blob).AsObject();
+
+            Assert.AreEqual(1u, decoded["LEVersion"]!.GetValue<uint>());
+            Assert.AreEqual(6u, decoded["Scale"]!.GetValue<uint>());
+        }
     }
 }
diff --git a/Xrpl/Models/Ledger/LOVault.cs b/Xrpl/Models/Ledger/LOVault.cs
index f50c08f8..ae7b15be 100644
--- a/Xrpl/Models/Ledger/LOVault.cs
+++ b/Xrpl/Models/Ledger/LOVault.cs
@@ -23,6 +23,27 @@ public enum VaultLedgerFlags : uint
     lsfVaultPrivate = 0x00010000,
 }
 
+/// <summary>
+/// Values of the Vault ledger entry's <c>LEVersion</c> field (rippled <c>VaultVersion</c>).
+/// </summary>
+/// <remarks>
+/// <see cref="LOVault.LEVersion"/> stays a plain <c>uint?</c>, matching the other UInt8
+/// fields of this object; these constants name the values the protocol defines so far.
+/// </remarks>
+public enum VaultVersion : uint
+{
+    /// <summary>
+    /// Accrual-basis accounting. Vaults created before cash-basis accounting was activated
+    /// carry no LEVersion at all and are treated as this version implicitly.
+    /// </summary>
+    Legacy = 0,
+
+    /// <summary>
+    /// Cash-basis accounting (rippled #7817).
+    /// </summary>
+    CashBasis = 1,
+}
+
 /// <summary>
 /// Recommended structure for the Vault Data field.
 /// The JSON is whitespace-removed and hex-encoded (max 256 bytes).
@@ -144,6 +165,14 @@ public LOVault()
     [JsonPropertyName("Scale")]
     public uint? Scale { get; init; }
 
+    /// <summary>
+    /// Schema version of this ledger entry (UInt8), see <see cref="VaultVersion"/>.
+    /// Absent on vaults created before cash-basis accounting was activated, which
+    /// rippled resolves as <see cref="VaultVersion.Legacy"/> (0) rather than an error.
+    /// </summary>
+    [JsonPropertyName("LEVersion")]
+    public uint? LEVersion { get; init; }
+
     /// <summary>
     /// Arbitrary hex-encoded data associated with the vault, limited to 256 bytes.
     /// Use <see cref="DataParsed"/> for a human-readable representation.