7.0
High
CVE-2026-4519 The webbrowser.open() API would accept leading dashes in the URL which could be handled as command line options for…
Description
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().
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| CPython 3.15 | 3.15.0a1 → < 3.15.0a8 | 3.15.0a8 |
| CPython 3.14 | 3.14.0 → < 3.14.4 | 3.14.4 |
| CPython 3.13 | 3.13.0 → < 3.13.13 | 3.13.13 |
| CPython 3.12 | 3.12.0 → < 3.12.14 | 3.12.14 |
| CPython 3.11 | 3.11.0 → < 3.11.16 | 3.11.16 |
| CPython 3.10 | earliest → < 3.10.21 | 3.10.21 |
| Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION) | Versions not published | |
| Red Hat Enterprise Linux Server Optional -EXTENSION (v. 6 ELS -EXTENSION) | Versions not published | |
| Red Hat Enterprise Linux Server (v. 7 ELS) | Versions not published |
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