webbrowser.open() allows leading dashes in URLs
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7epss 0.3%
exploitation probability
0.3%top 76% of all CVEs
observed exploitation
nono source reports it
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:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Affected products
Python Software Foundation · CPythonReferences
https://access.redhat.com/errata/RHSA-2026:10065https://access.redhat.com/errata/RHSA-2026:10101https://access.redhat.com/errata/RHSA-2026:10102https://access.redhat.com/errata/RHSA-2026:10111https://access.redhat.com/errata/RHSA-2026:10140https://access.redhat.com/errata/RHSA-2026:10141https://access.redhat.com/errata/RHSA-2026:13812https://access.redhat.com/errata/RHSA-2026:16008https://access.redhat.com/errata/RHSA-2026:16009https://access.redhat.com/errata/RHSA-2026:16030https://access.redhat.com/errata/RHSA-2026:16174https://access.redhat.com/errata/RHSA-2026:19019