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CVE-2026-4519

N/A

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().

CVE Details

CVSS v3.1 ScoreN/A

Published3/20/2026

Last Modified4/7/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-20

References

https://github.com/python/cpython/commit/3681d47a440865aead912a054d4599087b4270dd(cna@python.org)

https://github.com/python/cpython/commit/43fe06b96f6a6cf5cfd5bdab20b8649374956866(cna@python.org)

https://github.com/python/cpython/commit/591ed890270c5697b013bf637029fb3e6cd2d73e(cna@python.org)

https://github.com/python/cpython/commit/594b5a05dc9913880ac92eded440defbf32a28d1(cna@python.org)

https://github.com/python/cpython/commit/82a24a4442312bdcfc4c799885e8b3e00990f02b(cna@python.org)

https://github.com/python/cpython/commit/89bfb8e5ed3c7caa241028f1a4eac5f6275a46a4(cna@python.org)

https://github.com/python/cpython/commit/9669a912a0e329c094e992204d6bdb8787024d76(cna@python.org)

https://github.com/python/cpython/commit/96fc5048605863c7b6fd6289643feb0e97edd96c(cna@python.org)

https://github.com/python/cpython/commit/ad4d5ba32af4d80b0dfa2ba9d8203bfb219e60a5(cna@python.org)

https://github.com/python/cpython/commit/cbba6119391112aba9c5aebf7b94aea447922c48(cna@python.org)

https://github.com/python/cpython/commit/cc023511238ad93ecc8796157c6f9139a2bb2932(cna@python.org)

https://github.com/python/cpython/commit/ceac1efc66516ac387eef2c9a0ce671895b44f03(cna@python.org)

https://github.com/python/cpython/issues/143930(cna@python.org)

https://github.com/python/cpython/pull/143931(cna@python.org)

https://mail.python.org/archives/list/security-announce@python.org/thread/AY5NDSS433JK56Q7Q5IS7B37QFZVVOUS/(cna@python.org)

http://www.openwall.com/lists/oss-security/2026/03/20/1(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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