diff --git a/doc/release-notes/rl-2611.section.md b/doc/release-notes/rl-2611.section.md
index 6989db9f75e3..d7206ba99e2a 100644
--- a/doc/release-notes/rl-2611.section.md
+++ b/doc/release-notes/rl-2611.section.md
@@ -56,6 +56,8 @@
 
 - `librest` providing 0.7 ABI was removed. `librest_1_0` providing 1.0 ABI was renamed to `librest` and `librest_1_0` was kept as an alias.
 
+- `pnpm_10` was upgraded to version 10.34.1+, which introduced stricter integrity checks. If you encounter `ERR_PNPM_MISSING_TARBALL_INTEGRITY`, you can fall back to the older `pnpm_10_34_0`.
+
 - `fetchPnpmDeps`' `fetcherVersion = 1` and `fetcherVersion = 2` have been
   removed, as announced in the 26.05 release. Packages still using them now
   throw an evaluation error and must migrate to `fetcherVersion = 3` (or later)
diff --git a/pkgs/by-name/sh/sharkey/package.nix b/pkgs/by-name/sh/sharkey/package.nix
index 24bd745c8562..684383e39521 100644
--- a/pkgs/by-name/sh/sharkey/package.nix
+++ b/pkgs/by-name/sh/sharkey/package.nix
@@ -15,7 +15,7 @@
   pango,
   pixman,
   pkg-config,
-  pnpm_10,
+  pnpm_10_34_0,
   fetchPnpmDeps,
   pnpmConfigHook,
   python3,
@@ -24,7 +24,7 @@
 }:
 
 let
-  pnpm = pnpm_10.override { nodejs-slim = nodejs-slim_22; };
+  pnpm = pnpm_10_34_0.override { nodejs-slim = nodejs-slim_22; };
 in
 stdenv.mkDerivation (finalAttrs: {
   pname = "sharkey";
diff --git a/pkgs/by-name/vu/vue-language-server/package.nix b/pkgs/by-name/vu/vue-language-server/package.nix
index 79588684cd9f..78377e1228e1 100644
--- a/pkgs/by-name/vu/vue-language-server/package.nix
+++ b/pkgs/by-name/vu/vue-language-server/package.nix
@@ -4,13 +4,13 @@
   fetchFromGitHub,
   fetchPnpmDeps,
   pnpmConfigHook,
-  pnpm_10,
+  pnpm_10_34_0,
   nodejs,
   nix-update-script,
   makeBinaryWrapper,
 }:
 let
-  pnpm = pnpm_10;
+  pnpm = pnpm_10_34_0;
 in
 stdenv.mkDerivation (finalAttrs: {
   pname = "vue-language-server";
diff --git a/pkgs/development/tools/pnpm/default.nix b/pkgs/development/tools/pnpm/default.nix
index 4339c86d09cb..3edd8e5a6172 100644
--- a/pkgs/development/tools/pnpm/default.nix
+++ b/pkgs/development/tools/pnpm/default.nix
@@ -30,9 +30,21 @@ let
         "CVE-2026-55699"
       ];
     };
-    "10" = {
+    # 10.34.1 made a breaking change that causes
+    # ERR_PNPM_MISSING_TARBALL_INTEGRITY error for some packages.
+    "10_34_0" = {
       version = "10.34.0";
       hash = "sha256-WOFDJYhx31FYm2UcBiBdq+xIdmpdu6PCWZm2m1C+WY4=";
+      knownVulnerabilities = [
+        "CVE-2026-55487"
+        "CVE-2026-55698"
+        "CVE-2026-55180"
+        "CVE-2026-55697"
+      ];
+    };
+    "10" = {
+      version = "10.34.4";
+      hash = "sha256-mM1XGNvYxLJokVZJO5WWzs9rZLGpjUoIfoITWhdbQOs=";
     };
     "11" = {
       version = "11.9.0";
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 8fc736912ef5..89e8ab34a9ae 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -2812,6 +2812,7 @@ with pkgs;
     pnpm_8
     pnpm_9
     pnpm_10_29_2
+    pnpm_10_34_0
     pnpm_10
     pnpm_11
     ;