CVE-2026-4519
LOW severity · CVSS 3.3 · Improper input validation
3.3CVSS LOW
Summary
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().
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredNone
User interactionRequired
Confidentiality impactNone
Integrity impactLow
Availability impactNone
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Official patch: https://github.com/python/cpython/commit/3681d47a440865aead912a054d4599087b4270dd ↗
Additional information
- NVD record
- https://github.com/python/cpython/commit/3681d47a440865aead912a054d4599087b4270ddPatch
- https://github.com/python/cpython/commit/43fe06b96f6a6cf5cfd5bdab20b8649374956866Patch
- https://github.com/python/cpython/commit/591ed890270c5697b013bf637029fb3e6cd2d73ePatch
- https://github.com/python/cpython/commit/594b5a05dc9913880ac92eded440defbf32a28d1Patch
- https://github.com/python/cpython/commit/82a24a4442312bdcfc4c799885e8b3e00990f02bPatch
- https://github.com/python/cpython/commit/89bfb8e5ed3c7caa241028f1a4eac5f6275a46a4Patch
- https://github.com/python/cpython/commit/9669a912a0e329c094e992204d6bdb8787024d76Patch
- https://github.com/python/cpython/commit/96fc5048605863c7b6fd6289643feb0e97edd96cPatch