[OE-core][whinlatter][PATCH v3] python3-pip: Backport fix CVE-2026-1703

["Adarsh Jagadish Kamini" <adarsh.jagadish.kamini@est.tech>]

From: Adarsh Jagadish Kamini <adarsh.jagadish.kamini@est.tech>

Include the patch linked in the NVD report: https://github.com/pypa/pip/commit/8e227a9be4faa9594e05d02ca05a413a2a4e7735

Signed-off-by: Adarsh Jagadish Kamini <adarsh.jagadish.kamini@est.tech>
---
 .../python/python3-pip/CVE-2026-1703.patch    | 55 +++++++++++++++++++
 .../python/python3-pip_25.2.bb                |  4 +-
 2 files changed, 58 insertions(+), 1 deletion(-)
 create mode 100644 meta/recipes-devtools/python/python3-pip/CVE-2026-1703.patch

diff --git a/meta/recipes-devtools/python/python3-pip/CVE-2026-1703.patch b/meta/recipes-devtools/python/python3-pip/CVE-2026-1703.patch
new file mode 100644
index 0000000000..68220f8294
--- /dev/null
+++ b/meta/recipes-devtools/python/python3-pip/CVE-2026-1703.patch
@@ -0,0 +1,55 @@
+From 34bdfa654f2d3f9d036fb2abb28c175182a3da5c Mon Sep 17 00:00:00 2001
+From: Damian Shaw <damian.peter.shaw@gmail.com>
+Date: Fri, 30 Jan 2026 16:27:57 -0500
+Subject: [PATCH v3] Merge pull request #13777 from sethmlarson/commonpath
+
+Use os.path.commonpath() instead of commonprefix()
+
+CVE: CVE-2026-1703
+
+Upstream-Status: Backport [https://github.com/pypa/pip/commit/8e227a9be4faa9594e05d02ca05a413a2a4e7735]
+
+Signed-off-by: Adarsh Jagadish Kamini <adarsh.jagadish.kamini@est.tech>
+---
+ news/+1ee322a1.bugfix.rst            | 1 +
+ src/pip/_internal/utils/unpacking.py | 2 +-
+ tests/unit/test_utils_unpacking.py   | 2 ++
+ 3 files changed, 4 insertions(+), 1 deletion(-)
+ create mode 100644 news/+1ee322a1.bugfix.rst
+
+diff --git a/news/+1ee322a1.bugfix.rst b/news/+1ee322a1.bugfix.rst
+new file mode 100644
+index 000000000..edb1b320c
+--- /dev/null
++++ b/news/+1ee322a1.bugfix.rst
+@@ -0,0 +1 @@
++Use a path-segment prefix comparison, not char-by-char.
+diff --git a/src/pip/_internal/utils/unpacking.py b/src/pip/_internal/utils/unpacking.py
+index 0ad3129ac..7cb3de3c4 100644
+--- a/src/pip/_internal/utils/unpacking.py
++++ b/src/pip/_internal/utils/unpacking.py
+@@ -83,7 +83,7 @@ def is_within_directory(directory: str, target: str) -> bool:
+     abs_directory = os.path.abspath(directory)
+     abs_target = os.path.abspath(target)
+ 
+-    prefix = os.path.commonprefix([abs_directory, abs_target])
++    prefix = os.path.commonpath([abs_directory, abs_target])
+     return prefix == abs_directory
+ 
+ 
+diff --git a/tests/unit/test_utils_unpacking.py b/tests/unit/test_utils_unpacking.py
+index 6f373b1ac..a3abcfeb0 100644
+--- a/tests/unit/test_utils_unpacking.py
++++ b/tests/unit/test_utils_unpacking.py
+@@ -269,6 +269,8 @@ def test_unpack_tar_unicode(tmpdir: Path) -> None:
+         (("parent/", "parent/sub"), True),
+         # Test target outside parent
+         (("parent/", "parent/../sub"), False),
++        # Test target sub-string of parent
++        (("parent/child", "parent/childfoo"), False),
+     ],
+ )
+ def test_is_within_directory(args: tuple[str, str], expected: bool) -> None:
+-- 
+2.34.1
+
diff --git a/meta/recipes-devtools/python/python3-pip_25.2.bb b/meta/recipes-devtools/python/python3-pip_25.2.bb
index 350092d9ad..496eff1f15 100644
--- a/meta/recipes-devtools/python/python3-pip_25.2.bb
+++ b/meta/recipes-devtools/python/python3-pip_25.2.bb
@@ -24,7 +24,9 @@ LIC_FILES_CHKSUM = "file://LICENSE.txt;md5=63ec52baf95163b597008bb46db68030 \
 
 inherit pypi python_setuptools_build_meta
 
-SRC_URI += "file://no_shebang_mangling.patch"
+SRC_URI += "file://no_shebang_mangling.patch \
+            file://CVE-2026-1703.patch \
+            "
 
 SRC_URI[sha256sum] = "578283f006390f85bb6282dffb876454593d637f5d1be494b5202ce4877e71f2"
 
-- 
2.34.1