CVE-2026-4786

Mitgation of CVE-2026-4519 was incomplete. If the URL contained "%action" the mitigation could be bypassed for certain browser types the "webbrowser.open" API could have commands injected into the underlying shell. See CVE-2026-4519 for details...

CVE-2026-4786 Incomplete mitigation of CVE-2026-4519, %action expansion for command injection to webbrowser.open()

Mitgation of CVE-2026-4519 was incomplete. If the URL contained "%action" the mitigation could be bypassed for certain browser types the "webbrowser.open" API could have commands injected into the underlying shell. See CVE-2026-4519 for details...

CVE-2026-4786

CVE-2026-4786 notes incomplete mitigation of CVE-2026-4519. The issue arises when a URL contains "%action" allowing bypass of mitigation for certain browser types in Python's webbrowser.open(), enabling potential commands injected into the underlying shell. Connected CVE-4519 details indicate the...

CVE-2026-4786

Mitgation of CVE-2026-4519 was incomplete. If the URL contained "%action" the mitigation could be bypassed for certain browser types the "webbrowser.open" API could have commands injected into the underlying shell. See CVE-2026-4519 for details...

SUSE-SU-2026:21178-1 Security update for python313

This update for python313 fixes the following issues: Update to version 3.13.13. - CVE-2025-13462: incorrect parsing of TarInfo when GNU long name and type AREGTYPE are combined can lead to misinterpretation of tar archives bsc1259611. - CVE-2026-2297: incorrectly handled hook in FileLoader can...

OPENSUSE-SU-2026:20517-1 Security update for python313

This update for python313 fixes the following issues: Update to version 3.13.13. - CVE-2025-13462: incorrect parsing of TarInfo when GNU long name and type AREGTYPE are combined can lead to misinterpretation of tar archives bsc1259611. - CVE-2026-2297: incorrectly handled hook in FileLoader can...

Amazon Linux 2023 : python3.13, python3.13-devel, python3.13-freethreading (ALAS2023-2026-1555)

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1555 advisory. The webbrowser.open API would accept leading dashes in the URL whichcould be handled as command line options for certain web browsers. Newbehavior rejects leading dashes. Users are recommended to...

PT-2026-32545

Name of the Vulnerable Software and Affected Versions The product name cannot be determined affected versions not specified Description An incomplete mitigation allows for a bypass when a URL contains the string "%action". For certain browser types, this can lead to command injection into the...

Important: python3.14

Issue Overview: The webbrowser.open API would accept leading dashes in the URL which could be handled as command line options for certain web browsers. New behavior rejects leading dashes. Users are recommended to sanitize URLs prior to passing to webbrowser.open. CVE-2026-4519 Affected Packages:...

Amazon Linux 2023 : python3.11, python3.11-devel, python3.11-idle (ALAS2023-2026-1558)

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1558 advisory. The webbrowser.open API would accept leading dashes in the URL whichcould be handled as command line options for certain web browsers. Newbehavior rejects leading dashes. Users are recommended to...

Important: python3.13

Issue Overview: The webbrowser.open API would accept leading dashes in the URL which could be handled as command line options for certain web browsers. New behavior rejects leading dashes. Users are recommended to sanitize URLs prior to passing to webbrowser.open. CVE-2026-4519 Affected Packages:...

Amazon Linux 2023 : python3.12, python3.12-devel, python3.12-idle (ALAS2023-2026-1557)

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1557 advisory. The webbrowser.open API would accept leading dashes in the URL whichcould be handled as command line options for certain web browsers. Newbehavior rejects leading dashes. Users are recommended to...

MiracleLinux 9 : python3.9-3.9.25-3.el9_7.2 (AXSA:2026-419:03)

The remote MiracleLinux 9 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2026-419:03 advisory. python: Python: Command-line option injection in webbrowser.open via crafted URLs CVE-2026-4519 Tenable has extracted the preceding description block directly...

python: Python: Command-line option injection in webbrowser.open() via crafted URLs

A flaw was found in Python. The webbrowser.open API, used to launch web browsers, does not properly sanitize input. This allows a remote attacker to craft a malicious URL containing leading dashes. When such a URL is opened, certain web browsers may interpret these dashes as command-line options,...

python: Python: Command-line option injection in webbrowser.open() via crafted URLs

A flaw was found in Python. The webbrowser.open API, used to launch web browsers, does not properly sanitize input. This allows a remote attacker to craft a malicious URL containing leading dashes. When such a URL is opened, certain web browsers may interpret these dashes as command-line options,...

AlmaLinux 9 : python3.9 (ALSA-2026:6766)

The remote AlmaLinux 9 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2026:6766 advisory. python: Python: Command-line option injection in webbrowser.open via crafted URLs CVE-2026-4519 Tenable has extracted the preceding description block directly from...

python3.9 security update

An update is available for python3.9. This update affects Rocky Linux 9. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list Python is an interpreted, interactive, object-oriented programming language...

RLSA-2026:6766 Important: python3.9 security update

Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems. Security Fixes:...

python: Python: Command-line option injection in webbrowser.open() via crafted URLs

A flaw was found in Python. The webbrowser.open API, used to launch web browsers, does not properly sanitize input. This allows a remote attacker to craft a malicious URL containing leading dashes. When such a URL is opened, certain web browsers may interpret these dashes as command-line options,...

Important: Red Hat Security Advisory: python3.12 security update

An update for python3.12 is now available for Red Hat Enterprise Linux 10.0 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available...