diff --git a/agents/hermes/Dockerfile.base b/agents/hermes/Dockerfile.base
index 1364b7a0e1d..ef5da59a5ed 100644
--- a/agents/hermes/Dockerfile.base
+++ b/agents/hermes/Dockerfile.base
@@ -412,7 +412,9 @@ RUN printf '%s\n' \
 # skip rather than doing a nondeterministic dependency resolve during image
 # build.
 RUN pip3 install --no-cache-dir --break-system-packages "uv==${UV_VERSION}" \
-    && test "$(uv --version)" = "uv ${UV_VERSION}"
+    && uv_version_output="$(uv --version)" \
+    && uv_version="${uv_version_output#uv }" \
+    && test "${uv_version%% *}" = "${UV_VERSION}"
 # Upstream tests are not part of the production runtime and can contain
 # intentionally hostile security-test fixtures. Remove them in the extraction
 # RUN so their bytes never enter a published image layer.
diff --git a/test/hermes-dependency-review.test.ts b/test/hermes-dependency-review.test.ts
index 3a35357291a..8273c2aa0c7 100644
--- a/test/hermes-dependency-review.test.ts
+++ b/test/hermes-dependency-review.test.ts
@@ -1,6 +1,7 @@
 // SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 // SPDX-License-Identifier: Apache-2.0
 
+import { spawnSync } from "node:child_process";
 import fs from "node:fs";
 import path from "node:path";
 
@@ -32,6 +33,28 @@ function arg(name: string): string {
   return match?.[1] ?? "";
 }
 
+function uvVersionCheckStatus(output: string, expectedVersion: string): number | null {
+  const dockerfileLines = dockerfileBase.split("\n");
+  const installIndex = dockerfileLines.findIndex(
+    (line) => line.startsWith("RUN pip3 install ") && line.includes('"uv==${UV_VERSION}"'),
+  );
+  expect(installIndex, "Missing Dockerfile uv install command").toBeGreaterThanOrEqual(0);
+
+  const commandLines = dockerfileLines.slice(installIndex);
+  const commandEndIndex = commandLines.findIndex((line) => !line.endsWith("\\"));
+  const versionCheckLines = commandLines.slice(1, commandEndIndex + 1);
+  expect(versionCheckLines, "Missing Dockerfile uv version check").not.toHaveLength(0);
+
+  const script = [
+    'uv() { printf "%s\\n" "$UV_OUTPUT"; }',
+    "set -e",
+    ...versionCheckLines.map((line) => line.replace(/^\s*&&\s*/u, "").replace(/\s*\\$/u, "")),
+  ].join("\n");
+  return spawnSync("/bin/sh", ["-c", script], {
+    env: { ...process.env, UV_OUTPUT: output, UV_VERSION: expectedVersion },
+  }).status;
+}
+
 describe("Hermes 0.19.0 dependency review", () => {
   it("binds every active source identity to the reviewed release", () => {
     expect(arg("HERMES_VERSION")).toBe("v2026.7.20");
@@ -79,6 +102,22 @@ describe("Hermes 0.19.0 dependency review", () => {
     }
   });
 
+  it("accepts uv build metadata and rejects a different semantic version", () => {
+    const expectedVersion = arg("UV_VERSION");
+    const differentVersion = expectedVersion.replace(/\d+$/u, (patch) =>
+      String(Number.parseInt(patch, 10) + 1),
+    );
+    expect(
+      uvVersionCheckStatus(
+        `uv ${expectedVersion} (fece32fc5 2026-07-28 aarch64-unknown-linux-gnu)`,
+        expectedVersion,
+      ),
+    ).toBe(0);
+    expect(
+      uvVersionCheckStatus(`uv ${differentVersion} (different build metadata)`, expectedVersion),
+    ).toBe(1);
+  });
+
   it("ships the reviewed Python dependency remediations and records residual debt", () => {
     expect(dockerfileBase).toContain(
       "COPY agents/hermes/security-dependencies.patch /tmp/hermes-security-dependencies.patch",