python3-pip: Fix CVE-2026-1703

Pick patch according to [1]

[1] https://security-tracker.debian.org/tracker/CVE-2026-1703
[2] https://nvd.nist.gov/vuln/detail/CVE-2026-1703
[3] https://github.com/pypa/pip/pull/13777

(From OE-Core rev: 29c72a4729a42f75af47b6a7e04c9d52155e3c1f)

Signed-off-by: Vijay Anusuri <vanusuri@mvista.com>
Signed-off-by: Yoann Congal <yoann.congal@smile.fr>
Signed-off-by: Paul Barker <paul@pbarker.dev>

2 files changed, 40 insertions, 1 deletions

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..1470b7c541
--- /dev/null
+++ b/meta/recipes-devtools/python/python3-pip/CVE-2026-1703.patch
@@ -0,0 +1,37 @@
+From 4c651b70d60ed91b13663bcda9b3ed41748d0124 Mon Sep 17 00:00:00 2001
+From: Seth Michael Larson <seth@python.org>
+Date: Fri, 30 Jan 2026 09:49:11 -0600
+Subject: [PATCH] Use os.path.commonpath() instead of commonprefix()
+
+Upstream-Status: Backport [https://github.com/pypa/pip/commit/4c651b70d60ed91b13663bcda9b3ed41748d0124]
+CVE: CVE-2026-1703
+Signed-off-by: Vijay Anusuri <vanusuri@mvista.com>
+---
+ news/+1ee322a1.bugfix.rst            | 1 +
+ src/pip/_internal/utils/unpacking.py | 2 +-
+ 2 files changed, 2 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 0000000..edb1b32
+--- /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 78b5c13..0b26525 100644
+--- a/src/pip/_internal/utils/unpacking.py
++++ b/src/pip/_internal/utils/unpacking.py
+@@ -81,7 +81,7 @@ 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
+ 
+ 
+-- 
+2.43.0
+
diff --git a/meta/recipes-devtools/python/python3-pip_24.0.bb b/meta/recipes-devtools/python/python3-pip_24.0.bb
index be4a29500a..12a5e1cc3c 100644
--- a/meta/recipes-devtools/python/python3-pip_24.0.bb
+++ b/meta/recipes-devtools/python/python3-pip_24.0.bb
@@ -31,7 +31,9 @@ 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] = "ea9bd1a847e8c5774a5777bb398c19e80bcd4e2aa16a4b301b718fe6f593aba2"