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[2a01:cb00:1331:aa00:8234:f3c1:15ad:bb1a]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4925d013a69sm24334285e9.3.2026.06.23.06.14.31 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 23 Jun 2026 06:14:31 -0700 (PDT) From: Yoann Congal To: openembedded-core@lists.openembedded.org Subject: [OE-core][scarthgap 09/26] python3: Fix CVE-2026-4519 and CVE-2026-4786 Date: Tue, 23 Jun 2026 15:13:50 +0200 Message-ID: X-Mailer: git-send-email 2.47.3 In-Reply-To: References: MIME-Version: 1.0 List-Id: X-Webhook-Received: from 45-33-107-173.ip.linodeusercontent.com [45.33.107.173] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Tue, 23 Jun 2026 13:14:35 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/239375 From: Sudhir Dumbhare Apply the upstream v3.12 fix [1], aligned with the original v3.11 fix [2], and follow-up fix [3] to address CVE-2026-4519 by disallowing URLs with leading dashes when invoking browser commands, as referenced in [5]. CVE-2026-4786 [6] revealed the CVE-2026-4519 fix was incomplete, as %action in URLs could bypass dash-prefix checks. Apply follow-up fix [4], noted in [5], to revalidate the URL after %action expansion. [1] https://github.com/python/cpython/commit/cbba6119391112aba9c5aebf7b94aea447922c48 [2] https://github.com/python/cpython/commit/ceac1efc66516ac387eef2c9a0ce671895b44f03 [3] https://github.com/python/cpython/commit/96fc5048605863c7b6fd6289643feb0e97edd96c [4] https://github.com/python/cpython/commit/f4654824ae0850ac87227fb270f9057477946769 [5] https://security-tracker.debian.org/tracker/CVE-2026-4519 [6] https://security-tracker.debian.org/tracker/CVE-2026-4786 References: https://nvd.nist.gov/vuln/detail/CVE-2026-4519 https://nvd.nist.gov/vuln/detail/CVE-2026-4786 Signed-off-by: Sudhir Dumbhare Signed-off-by: Yoann Congal --- .../python3/CVE-2026-4519_CVE-2026-4786.patch | 66 ++++++++ .../python/python3/CVE-2026-4519_p1.patch | 107 ++++++++++++ .../python/python3/CVE-2026-4519_p2.patch | 159 ++++++++++++++++++ .../python/python3_3.12.13.bb | 3 + 4 files changed, 335 insertions(+) create mode 100644 meta/recipes-devtools/python/python3/CVE-2026-4519_CVE-2026-4786.patch create mode 100644 meta/recipes-devtools/python/python3/CVE-2026-4519_p1.patch create mode 100644 meta/recipes-devtools/python/python3/CVE-2026-4519_p2.patch diff --git a/meta/recipes-devtools/python/python3/CVE-2026-4519_CVE-2026-4786.patch b/meta/recipes-devtools/python/python3/CVE-2026-4519_CVE-2026-4786.patch new file mode 100644 index 00000000000..6a4714f25ae --- /dev/null +++ b/meta/recipes-devtools/python/python3/CVE-2026-4519_CVE-2026-4786.patch @@ -0,0 +1,66 @@ +From b9af29b9f2f880cdcdc49a1460743680f59dcb4e Mon Sep 17 00:00:00 2001 +From: Stan Ulbrych +Date: Mon, 13 Apr 2026 22:41:51 +0100 +Subject: [PATCH] [3.11] gh-148169: Fix webbrowser `%action` substitution + bypass of dash-prefix check (GH-148170) (#148520) + +CVE: CVE-2026-4519 CVE-2026-4786 +Upstream-Status: Backport [https://github.com/python/cpython/commit/f4654824ae0850ac87227fb270f9057477946769] + +Backport Changes: +- This file is not present in the current version and is therefore omitted. + Misc/NEWS.d/next/Security/2026-03-31-09-15-51.gh-issue-148169.EZJzz2.rst + +(cherry picked from commit d22922c8a7958353689dc4763dd72da2dea03fff) +(cherry picked from commit f4654824ae0850ac87227fb270f9057477946769) +Signed-off-by: Sudhir Dumbhare +--- + Lib/test/test_webbrowser.py | 8 ++++++++ + Lib/webbrowser.py | 5 +++-- + 2 files changed, 11 insertions(+), 2 deletions(-) + +diff --git a/Lib/test/test_webbrowser.py b/Lib/test/test_webbrowser.py +index c9bf525360d..1d21f133725 100644 +--- a/Lib/test/test_webbrowser.py ++++ b/Lib/test/test_webbrowser.py +@@ -103,6 +103,14 @@ class ChromeCommandTest(CommandTestMixin, unittest.TestCase): + options=[], + arguments=[URL]) + ++ def test_reject_action_dash_prefixes(self): ++ browser = self.browser_class(name=CMD_NAME) ++ with self.assertRaises(ValueError): ++ browser.open('%action--incognito') ++ # new=1: action is "--new-window", so "%action" itself expands to ++ # a dash-prefixed flag even with no dash in the original URL. ++ with self.assertRaises(ValueError): ++ browser.open('%action', new=1) + + class EdgeCommandTest(CommandTestMixin, unittest.TestCase): + +diff --git a/Lib/webbrowser.py b/Lib/webbrowser.py +index 000e89275b7..97c4eec9080 100755 +--- a/Lib/webbrowser.py ++++ b/Lib/webbrowser.py +@@ -268,7 +268,6 @@ class UnixBrowser(BaseBrowser): + + def open(self, url, new=0, autoraise=True): + sys.audit("webbrowser.open", url) +- self._check_url(url) + if new == 0: + action = self.remote_action + elif new == 1: +@@ -282,7 +281,9 @@ class UnixBrowser(BaseBrowser): + raise Error("Bad 'new' parameter to open(); " + + "expected 0, 1, or 2, got %s" % new) + +- args = [arg.replace("%s", url).replace("%action", action) ++ self._check_url(url.replace("%action", action)) ++ ++ args = [arg.replace("%action", action).replace("%s", url) + for arg in self.remote_args] + args = [arg for arg in args if arg] + success = self._invoke(args, True, autoraise, url) +-- +2.35.6 + diff --git a/meta/recipes-devtools/python/python3/CVE-2026-4519_p1.patch b/meta/recipes-devtools/python/python3/CVE-2026-4519_p1.patch new file mode 100644 index 00000000000..1514d2c5414 --- /dev/null +++ b/meta/recipes-devtools/python/python3/CVE-2026-4519_p1.patch @@ -0,0 +1,107 @@ +From 7df48dd3c6330611a04d85a5159c0ea424dc1e62 Mon Sep 17 00:00:00 2001 +From: Pinky +Date: Wed, 25 Mar 2026 01:02:37 +0530 +Subject: [PATCH] [3.12] gh-143930: Reject leading dashes in webbrowser + URLs (GH-146360) + +CVE: CVE-2026-4519 +Upstream-Status: Backport [https://github.com/python/cpython/commit/cbba6119391112aba9c5aebf7b94aea447922c48] + +Backport Changes: +- This file is not present in the current version and is therefore omitted + Misc/NEWS.d/next/Security/2026-01-16-12-04-49.gh-issue-143930.zYC5x3.rst + +(cherry picked from commit 82a24a4442312bdcfc4c799885e8b3e00990f02b) + +Co-authored-by: Seth Michael Larson +(cherry picked from commit cbba6119391112aba9c5aebf7b94aea447922c48) +Signed-off-by: Sudhir Dumbhare +--- + Lib/test/test_webbrowser.py | 5 +++++ + Lib/webbrowser.py | 12 ++++++++++++ + 2 files changed, 17 insertions(+) + +diff --git a/Lib/test/test_webbrowser.py b/Lib/test/test_webbrowser.py +index 2d695bc8831..60f094fd6a1 100644 +--- a/Lib/test/test_webbrowser.py ++++ b/Lib/test/test_webbrowser.py +@@ -59,6 +59,11 @@ class GenericBrowserCommandTest(CommandTestMixin, unittest.TestCase): + options=[], + arguments=[URL]) + ++ def test_reject_dash_prefixes(self): ++ browser = self.browser_class(name=CMD_NAME) ++ with self.assertRaises(ValueError): ++ browser.open(f"--key=val {URL}") ++ + + class BackgroundBrowserCommandTest(CommandTestMixin, unittest.TestCase): + +diff --git a/Lib/webbrowser.py b/Lib/webbrowser.py +index 13b9e85f9e1..0bdb644d7db 100755 +--- a/Lib/webbrowser.py ++++ b/Lib/webbrowser.py +@@ -158,6 +158,12 @@ class BaseBrowser(object): + def open_new_tab(self, url): + return self.open(url, 2) + ++ @staticmethod ++ def _check_url(url): ++ """Ensures that the URL is safe to pass to subprocesses as a parameter""" ++ if url and url.lstrip().startswith("-"): ++ raise ValueError(f"Invalid URL: {url}") ++ + + class GenericBrowser(BaseBrowser): + """Class for all browsers started with a command +@@ -175,6 +181,7 @@ class GenericBrowser(BaseBrowser): + + def open(self, url, new=0, autoraise=True): + sys.audit("webbrowser.open", url) ++ self._check_url(url) + cmdline = [self.name] + [arg.replace("%s", url) + for arg in self.args] + try: +@@ -195,6 +202,7 @@ class BackgroundBrowser(GenericBrowser): + cmdline = [self.name] + [arg.replace("%s", url) + for arg in self.args] + sys.audit("webbrowser.open", url) ++ self._check_url(url) + try: + if sys.platform[:3] == 'win': + p = subprocess.Popen(cmdline) +@@ -260,6 +268,7 @@ class UnixBrowser(BaseBrowser): + + def open(self, url, new=0, autoraise=True): + sys.audit("webbrowser.open", url) ++ self._check_url(url) + if new == 0: + action = self.remote_action + elif new == 1: +@@ -350,6 +359,7 @@ class Konqueror(BaseBrowser): + + def open(self, url, new=0, autoraise=True): + sys.audit("webbrowser.open", url) ++ self._check_url(url) + # XXX Currently I know no way to prevent KFM from opening a new win. + if new == 2: + action = "newTab" +@@ -554,6 +564,7 @@ if sys.platform[:3] == "win": + class WindowsDefault(BaseBrowser): + def open(self, url, new=0, autoraise=True): + sys.audit("webbrowser.open", url) ++ self._check_url(url) + try: + os.startfile(url) + except OSError: +@@ -638,6 +649,7 @@ if sys.platform == 'darwin': + + def open(self, url, new=0, autoraise=True): + sys.audit("webbrowser.open", url) ++ self._check_url(url) + if self.name == 'default': + script = 'open location "%s"' % url.replace('"', '%22') # opens in default browser + else: +-- +2.35.6 + diff --git a/meta/recipes-devtools/python/python3/CVE-2026-4519_p2.patch b/meta/recipes-devtools/python/python3/CVE-2026-4519_p2.patch new file mode 100644 index 00000000000..7ee145e5e80 --- /dev/null +++ b/meta/recipes-devtools/python/python3/CVE-2026-4519_p2.patch @@ -0,0 +1,159 @@ +From 3ca64ff1722d2410a4e50e760de70f6279fa99fa Mon Sep 17 00:00:00 2001 +From: "Miss Islington (bot)" + <31488909+miss-islington@users.noreply.github.com> +Date: Sat, 4 Apr 2026 00:53:49 +0200 +Subject: [PATCH] [3.11] gh-143930: Tweak the exception message and + increase test coverage (GH-146476) (GH-148045) (GH-148051) (GH-148052) +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +CVE: CVE-2026-4519 +Upstream-Status: Backport [https://github.com/python/cpython/commit/96fc5048605863c7b6fd6289643feb0e97edd96c] + +Backport Changes: +- This file is not present in the current version and is therefore omitted. + Misc/NEWS.d/next/Security/2026-01-16-12-04-49.gh-issue-143930.zYC5x3.rst +- The file introduced in v3.12 by this commit; + https://github.com/python/cpython/commit/cbba6119391112aba9c5aebf7b94aea447922c48 + +(cherry picked from commit cc023511238ad93ecc8796157c6f9139a2bb2932) +(cherry picked from commit 89bfb8e5ed3c7caa241028f1a4eac5f6275a46a4) +(cherry picked from commit 3681d47a440865aead912a054d4599087b4270dd) + +Co-authored-by: Łukasz Langa +(cherry picked from commit 96fc5048605863c7b6fd6289643feb0e97edd96c) +Signed-off-by: Sudhir Dumbhare +--- + Lib/test/test_webbrowser.py | 81 ++++++++++++++++++++++++++++++++++--- + Lib/webbrowser.py | 2 +- + 2 files changed, 76 insertions(+), 7 deletions(-) + +diff --git a/Lib/test/test_webbrowser.py b/Lib/test/test_webbrowser.py +index 60f094fd6a1..c9bf525360d 100644 +--- a/Lib/test/test_webbrowser.py ++++ b/Lib/test/test_webbrowser.py +@@ -1,6 +1,7 @@ ++import io ++import os + import webbrowser + import unittest +-import os + import sys + import subprocess + from unittest import mock +@@ -49,6 +50,14 @@ class CommandTestMixin: + popen_args.pop(popen_args.index(option)) + self.assertEqual(popen_args, arguments) + ++ def test_reject_dash_prefixes(self): ++ browser = self.browser_class(name=CMD_NAME) ++ with self.assertRaisesRegex( ++ ValueError, ++ r"^Invalid URL \(leading dash disallowed\): '--key=val http.*'$" ++ ): ++ browser.open(f"--key=val {URL}") ++ + + class GenericBrowserCommandTest(CommandTestMixin, unittest.TestCase): + +@@ -59,11 +68,6 @@ class GenericBrowserCommandTest(CommandTestMixin, unittest.TestCase): + options=[], + arguments=[URL]) + +- def test_reject_dash_prefixes(self): +- browser = self.browser_class(name=CMD_NAME) +- with self.assertRaises(ValueError): +- browser.open(f"--key=val {URL}") +- + + class BackgroundBrowserCommandTest(CommandTestMixin, unittest.TestCase): + +@@ -224,6 +228,71 @@ class ELinksCommandTest(CommandTestMixin, unittest.TestCase): + arguments=['openURL({},new-tab)'.format(URL)]) + + ++class MockPopenPipe: ++ def __init__(self, cmd, mode): ++ self.cmd = cmd ++ self.mode = mode ++ self.pipe = io.StringIO() ++ self._closed = False ++ ++ def write(self, buf): ++ self.pipe.write(buf) ++ ++ def close(self): ++ self._closed = True ++ return None ++ ++ ++@unittest.skipUnless(sys.platform == "darwin", "macOS specific test") ++class MacOSXOSAScriptTest(unittest.TestCase): ++ def setUp(self): ++ # Ensure that 'BROWSER' is not set to 'open' or something else. ++ # See: https://github.com/python/cpython/issues/131254. ++ env = self.enterContext(os_helper.EnvironmentVarGuard()) ++ env.unset("BROWSER") ++ ++ support.patch(self, os, "popen", self.mock_popen) ++ self.browser = webbrowser.MacOSXOSAScript("default") ++ ++ def mock_popen(self, cmd, mode): ++ self.popen_pipe = MockPopenPipe(cmd, mode) ++ return self.popen_pipe ++ ++ def test_default(self): ++ browser = webbrowser.get() ++ assert isinstance(browser, webbrowser.MacOSXOSAScript) ++ self.assertEqual(browser.name, "default") ++ ++ def test_default_open(self): ++ url = "https://python.org" ++ self.browser.open(url) ++ self.assertTrue(self.popen_pipe._closed) ++ self.assertEqual(self.popen_pipe.cmd, "osascript") ++ script = self.popen_pipe.pipe.getvalue() ++ self.assertEqual(script.strip(), f'open location "{url}"') ++ ++ def test_url_quote(self): ++ self.browser.open('https://python.org/"quote"') ++ script = self.popen_pipe.pipe.getvalue() ++ self.assertEqual( ++ script.strip(), 'open location "https://python.org/%22quote%22"' ++ ) ++ ++ def test_explicit_browser(self): ++ browser = webbrowser.MacOSXOSAScript("safari") ++ browser.open("https://python.org") ++ script = self.popen_pipe.pipe.getvalue() ++ self.assertIn('tell application "safari"', script) ++ self.assertIn('open location "https://python.org"', script) ++ ++ def test_reject_dash_prefixes(self): ++ with self.assertRaisesRegex( ++ ValueError, ++ r"^Invalid URL \(leading dash disallowed\): '--key=val http.*'$" ++ ): ++ self.browser.open(f"--key=val {URL}") ++ ++ + class BrowserRegistrationTest(unittest.TestCase): + + def setUp(self): +diff --git a/Lib/webbrowser.py b/Lib/webbrowser.py +index 0bdb644d7db..000e89275b7 100755 +--- a/Lib/webbrowser.py ++++ b/Lib/webbrowser.py +@@ -162,7 +162,7 @@ class BaseBrowser(object): + def _check_url(url): + """Ensures that the URL is safe to pass to subprocesses as a parameter""" + if url and url.lstrip().startswith("-"): +- raise ValueError(f"Invalid URL: {url}") ++ raise ValueError(f"Invalid URL (leading dash disallowed): {url!r}") + + + class GenericBrowser(BaseBrowser): +-- +2.35.6 + diff --git a/meta/recipes-devtools/python/python3_3.12.13.bb b/meta/recipes-devtools/python/python3_3.12.13.bb index c59d9fba80d..ec9ea94824e 100644 --- a/meta/recipes-devtools/python/python3_3.12.13.bb +++ b/meta/recipes-devtools/python/python3_3.12.13.bb @@ -37,6 +37,9 @@ SRC_URI = "http://www.python.org/ftp/python/${PV}/Python-${PV}.tar.xz \ file://CVE-2026-1502.patch \ file://CVE-2026-6100.patch \ file://CVE-2026-3644_CVE-2026-0672.patch \ + file://CVE-2026-4519_p1.patch \ + file://CVE-2026-4519_p2.patch \ + file://CVE-2026-4519_CVE-2026-4786.patch \ " SRC_URI:append:class-native = " \