Vulnerability in Python Software Foundation Cpython
CVE-2026-4519
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 we…
EPSS: 0.000 (3.1th percentile) — read the EPSS interpretation.
Affected products
- Python Software Foundation Cpython — versions 0, 3.14.0, 3.15.0a1
References
- github.com/python/cpython/pull/143931 (patch)
- github.com/python/cpython/issues/143930 (issue-tracking)
- mail.python.org/archives/list/security-announce@python.org/thread/AY5NDSS433JK5… (vendor-advisory)
- github.com/python/cpython/commit/43fe06b96f6a6cf5cfd5bdab20b8649374956866 (patch)
- github.com/python/cpython/commit/82a24a4442312bdcfc4c799885e8b3e00990f02b (patch)
- github.com/python/cpython/commit/9669a912a0e329c094e992204d6bdb8787024d76 (patch)
- github.com/python/cpython/commit/ad4d5ba32af4d80b0dfa2ba9d8203bfb219e60a5 (patch)
- github.com/python/cpython/commit/ceac1efc66516ac387eef2c9a0ce671895b44f03 (patch)
- github.com/python/cpython/commit/cbba6119391112aba9c5aebf7b94aea447922c48 (patch)
- github.com/python/cpython/commit/3681d47a440865aead912a054d4599087b4270dd (patch)