CVE-2026-4519 | Python CPython up to 3.14.x API webbrowser.open (ID 143930 / EUVD-2026-13712)

VDB-352090 · CVE-2026-4519 · ID 143930 PYTHON CPYTHON UP TO 3.14.X API WEBBROWSER.OPEN HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 2.4 $0-$5k 2.85+ Summaryinfo A vulnerability was found in Python CPython up to 3.14.x and classified as problematic. This affects the function webbrowser.open of the component API. Executing a manipulation can lead to an unknown weakness. This vulnerability is registered as CVE-2026-4519. The attack needs to be launched locally. No exploit is available. It is suggested to upgrade the affected component. Detailsinfo A vulnerability classified as problematic was found in Python CPython up to 3.14.x. This vulnerability affects the function webbrowser.open of the component API. As an impact it is known to affect integrity. CVE summarizes: 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(). The advisory is available at github.com. This vulnerability was named CVE-2026-4519 since 03/20/2026. The exploitation appears to be difficult. Local access is required to approach this attack. Technical details are known, but there is no available exploit. Upgrading to version 3.15.0 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version. The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-13712). Productinfo Type Programming Language Software Vendor Python Name CPython Version 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 License open-source Website Product: https://github.com/python/cpython/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA CVSS-B Score: 🔒 CNA CVSS-BT Score: 🔒 CNA Vector: 🔒 CVSSv3info VulDB Meta Base Score: 2.5 VulDB Meta Temp Score: 2.4 VulDB Base Score: 2.5 VulDB Temp Score: 2.4 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Unknown CWE: Unknown CAPEC: 🔒 ATT&CK: 🔒 Physical: Partially Local: Yes Remote: No Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: CPython 3.15.0 Patch: github.com Timelineinfo 03/20/2026 Advisory disclosed 03/20/2026 +0 days CVE reserved 03/20/2026 +0 days VulDB entry created 03/20/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: 143930 Status: Confirmed CVE: CVE-2026-4519 (🔒) GCVE (CVE): GCVE-0-2026-4519 GCVE (VulDB): GCVE-100-352090 EUVD: 🔒 Entryinfo Created: 03/20/2026 17:27 Updated: 03/20/2026 17:39 Changes: 03/20/2026 17:27 (69), 03/20/2026 17:39 (1) Complete: 🔍 Cache ID: 99:E61:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸