diff --git a/conda/environments/all_cuda-129_arch-aarch64.yaml b/conda/environments/all_cuda-129_arch-aarch64.yaml
index 84620d9b12ea..71bd3873d456 100644
--- a/conda/environments/all_cuda-129_arch-aarch64.yaml
+++ b/conda/environments/all_cuda-129_arch-aarch64.yaml
@@ -72,7 +72,7 @@ dependencies:
 - odfpy
 - openpyxl
 - packaging
-- pandas>=3.0.0,<3.1.0
+- pandas>=3.0.0,<3.0.4a0
 - pandoc
 - polars>=1.35,<1.42
 - pre-commit
diff --git a/conda/environments/all_cuda-129_arch-x86_64.yaml b/conda/environments/all_cuda-129_arch-x86_64.yaml
index 618dad2442a7..5bf990d78f91 100644
--- a/conda/environments/all_cuda-129_arch-x86_64.yaml
+++ b/conda/environments/all_cuda-129_arch-x86_64.yaml
@@ -72,7 +72,7 @@ dependencies:
 - odfpy
 - openpyxl
 - packaging
-- pandas>=3.0.0,<3.1.0
+- pandas>=3.0.0,<3.0.4a0
 - pandoc
 - polars>=1.35,<1.42
 - pre-commit
diff --git a/conda/environments/all_cuda-133_arch-aarch64.yaml b/conda/environments/all_cuda-133_arch-aarch64.yaml
index 0c247e6b10a1..ae7839c8303d 100644
--- a/conda/environments/all_cuda-133_arch-aarch64.yaml
+++ b/conda/environments/all_cuda-133_arch-aarch64.yaml
@@ -72,7 +72,7 @@ dependencies:
 - odfpy
 - openpyxl
 - packaging
-- pandas>=3.0.0,<3.1.0
+- pandas>=3.0.0,<3.0.4a0
 - pandoc
 - polars>=1.35,<1.42
 - pre-commit
diff --git a/conda/environments/all_cuda-133_arch-x86_64.yaml b/conda/environments/all_cuda-133_arch-x86_64.yaml
index 94cd3772c26d..5ae487fb98d8 100644
--- a/conda/environments/all_cuda-133_arch-x86_64.yaml
+++ b/conda/environments/all_cuda-133_arch-x86_64.yaml
@@ -72,7 +72,7 @@ dependencies:
 - odfpy
 - openpyxl
 - packaging
-- pandas>=3.0.0,<3.1.0
+- pandas>=3.0.0,<3.0.4a0
 - pandoc
 - polars>=1.35,<1.42
 - pre-commit
diff --git a/dependencies.yaml b/dependencies.yaml
index 01113fdba333..bd99c363541a 100644
--- a/dependencies.yaml
+++ b/dependencies.yaml
@@ -914,7 +914,11 @@ dependencies:
       - output_types: [conda, requirements, pyproject]
         packages:
           - fsspec>=0.6.0
-          - &pandas pandas>=3.0.0,<3.1.0
+          # pandas 3.0.4 segfaults constructing pd.Timedelta on Python 3.14,
+          # which breaks `import cudf` (https://github.com/pandas-dev/pandas/issues/66086).
+          # Cap below 3.0.4 (rather than just excluding it) until a fixed
+          # release is confirmed upstream, then raise the bound.
+          - &pandas pandas>=3.0.0,<3.0.4a0
   run_pylibcudf:
     common:
       - output_types: [conda, requirements, pyproject]
@@ -1033,7 +1037,7 @@ dependencies:
           - matrix: {dependencies: "oldest"}
             packages:
               - numba==0.60.0
-              - pandas==3.0.*
+              - pandas==3.0.*,<3.0.4a0
               - numba-cuda==0.22.2
           - matrix: {dependencies: "latest"}
             packages:
@@ -1162,6 +1166,11 @@ dependencies:
           - pytest-httpserver
           - pytest-timeout
           - zstandard
+          # The polars test suite constructs pandas objects for interop and
+          # dask-cuda pulls pandas in transitively (unbounded), so constrain it
+          # here to exclude the 3.0.4 release that segfaults on pd.Timedelta
+          # (https://github.com/pandas-dev/pandas/issues/66086).
+          - *pandas
   test_python_narwhals:
     common:
       - output_types: [conda, requirements, pyproject]
@@ -1679,7 +1688,7 @@ dependencies:
               pandas_compat_version: "3.0"
             packages:
               - numpy>=1.26,<2.0a0
-              - pandas==3.0.*
+              - pandas==3.0.*,<3.0.4a0
           - matrix:
             packages:
       - output_types: requirements
diff --git a/python/cudf/pyproject.toml b/python/cudf/pyproject.toml
index c18fc6763a00..1b75ab0fcd28 100644
--- a/python/cudf/pyproject.toml
+++ b/python/cudf/pyproject.toml
@@ -30,7 +30,7 @@ dependencies = [
     "numpy>=1.26,<3.0",
     "nvtx>=0.2.1",
     "packaging",
-    "pandas>=3.0.0,<3.1.0",
+    "pandas>=3.0.0,<3.0.4a0",
     "pyarrow>=19.0.0,<24",
     "pylibcudf==26.8.*,>=0.0.0a0",
     "rich",
diff --git a/python/cudf_polars/pyproject.toml b/python/cudf_polars/pyproject.toml
index b4d8662c62db..3f9f6cbff5e9 100644
--- a/python/cudf_polars/pyproject.toml
+++ b/python/cudf_polars/pyproject.toml
@@ -44,6 +44,7 @@ classifiers = [
 [project.optional-dependencies]
 test = [
     "dask-cuda==26.8.*,>=0.0.0a0",
+    "pandas>=3.0.0,<3.0.4a0",
     "pytest-cov",
     "pytest-httpserver",
     "pytest-timeout",
diff --git a/python/dask_cudf/pyproject.toml b/python/dask_cudf/pyproject.toml
index 624a6abce7ad..65338270f1b9 100644
--- a/python/dask_cudf/pyproject.toml
+++ b/python/dask_cudf/pyproject.toml
@@ -1,4 +1,4 @@
-# SPDX-FileCopyrightText: Copyright (c) 2021-2026, NVIDIA CORPORATION.
+# SPDX-FileCopyrightText: Copyright (c) 2021-2026, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 # SPDX-License-Identifier: Apache-2.0
 
 [build-system]
@@ -26,7 +26,7 @@ dependencies = [
     "fsspec>=0.6.0",
     "numpy>=1.26,<3.0",
     "nvidia-ml-py>=12",
-    "pandas>=3.0.0,<3.1.0",
+    "pandas>=3.0.0,<3.0.4a0",
     "rapids-dask-dependency==26.8.*,>=0.0.0a0",
 ] # This list was generated by `rapids-dependency-file-generator`. To make changes, edit ../../dependencies.yaml and run `rapids-dependency-file-generator`.
 classifiers = [
diff --git a/python/pylibcudf/pyproject.toml b/python/pylibcudf/pyproject.toml
index 46a8a62e1721..f5f89e0156ba 100644
--- a/python/pylibcudf/pyproject.toml
+++ b/python/pylibcudf/pyproject.toml
@@ -43,7 +43,7 @@ test = [
     "nanoarrow",
     "numba-cuda>=0.22.2",
     "numba>=0.60.0,<0.65.0",
-    "pandas>=3.0.0,<3.1.0",
+    "pandas>=3.0.0,<3.0.4a0",
     "pyarrow>=19.0.0,<24",
     "pytest-cov",
     "pytest-xdist",