CVE-2026-4786

Name
CVE-2026-4786
Description
Mitgation of CVE-2026-4519 was incomplete. If the URL contained "%action" the mitigation could be bypassed for certain browser types the "webbrowser.open()" API could have commands injected into the underlying shell. See CVE-2026-4519 for details.
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
cna@python.org https://github.com/python/cpython/issues/148169
cna@python.org https://github.com/python/cpython/pull/148170
cna@python.org https://mail.python.org/archives/list/security-announce@python.org/thread/JQDUNJVB4AQNTJECSUKOBDU3XCJIPSE5/
cna@python.org https://github.com/python/cpython/commit/c5767a72838a8dda9d6dc5d3558075b055c56bca
cna@python.org https://github.com/python/cpython/commit/d22922c8a7958353689dc4763dd72da2dea03fff
cna@python.org https://github.com/python/cpython/commit/f4654824ae0850ac87227fb270f9057477946769
cna@python.org https://github.com/python/cpython/commit/28b4ad38067bbdad34edfcd03ad2de5f06387e53
cna@python.org https://github.com/python/cpython/commit/d6d68494be70bdbda20f89f83801ba52ec37daa4
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:10117
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:10140
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:10141
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:10711
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:10745
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:10774
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:10949
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:10950
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:11062
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:11077
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:11768
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:13692
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:13812
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:14652
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:14653
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:14656
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:16699
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:17525
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:17619
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:19019
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:19064
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:19175
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:19176
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:19177
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:19216
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:19549
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:19570
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:19571
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:19576
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:19589
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:19590
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:21275
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:21682
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:22144
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:25096
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:26187
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:28247
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:28581
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:30078
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:30087
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:30088
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:30089
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:8822
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:8824
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:9228
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/security/cve/CVE-2026-4786
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://bugzilla.redhat.com/show_bug.cgi?id=2458049
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4786.json
0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:35838
cna@python.org https://github.com/python/cpython/commit/a4d3edf3a6ecfde504d02126410d2a65a859b744

Match rules

CPE URI Source package Min version Max version

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
python3 3.23-main 3.12.14-r0 Natanael Copa <ncopa@alpinelinux.org> fixed
python3 3.22-main 3.12.14-r0 Natanael Copa <ncopa@alpinelinux.org> fixed
python3 3.21-main 3.12.14-r0 Natanael Copa <ncopa@alpinelinux.org> fixed