Vulnerability 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().
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Python | Python | < 3.13.13 |
Related Weaknesses (CWE)
References
- https://github.com/python/cpython/commit/3681d47a440865aead912a054d4599087b4270dPatch
- https://github.com/python/cpython/commit/43fe06b96f6a6cf5cfd5bdab20b864937495686Patch
- https://github.com/python/cpython/commit/591ed890270c5697b013bf637029fb3e6cd2d73Patch
- https://github.com/python/cpython/commit/594b5a05dc9913880ac92eded440defbf32a28dPatch
- https://github.com/python/cpython/commit/82a24a4442312bdcfc4c799885e8b3e00990f02Patch
- https://github.com/python/cpython/commit/89bfb8e5ed3c7caa241028f1a4eac5f6275a46aPatch
- https://github.com/python/cpython/commit/9669a912a0e329c094e992204d6bdb8787024d7Patch
- https://github.com/python/cpython/commit/96fc5048605863c7b6fd6289643feb0e97edd96Patch
- https://github.com/python/cpython/commit/ad4d5ba32af4d80b0dfa2ba9d8203bfb219e60aPatch
- https://github.com/python/cpython/commit/cbba6119391112aba9c5aebf7b94aea447922c4Patch
- https://github.com/python/cpython/commit/cc023511238ad93ecc8796157c6f9139a2bb293Patch
- https://github.com/python/cpython/commit/ceac1efc66516ac387eef2c9a0ce671895b44f0Patch
- https://github.com/python/cpython/issues/143930Issue TrackingPatch
- https://github.com/python/cpython/pull/143931Issue TrackingPatch
- https://mail.python.org/archives/list/[email protected]/thread/AY5NDSVendor Advisory
FAQ
What is CVE-2026-4519?
CVE-2026-4519 is a vulnerability with a CVSS score of 3.3 (LOW). 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 t...
How severe is CVE-2026-4519?
CVE-2026-4519 has been rated LOW with a CVSS base score of 3.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-4519?
Check the references section above for vendor advisories and patch information. Affected products include: Python Python.