{"schema_version":"1.9.0","id":"CVE-2026-4786","published":"2026-04-13T21:52:19.036Z","modified":"2026-09-04T18:25:58.178635908Z","aliases":["BIT-libpython-2026-4786","BIT-python-2026-4786","BIT-python-min-2026-4786","PSF-0000-CVE-2026-4786","PSF-2026-17"],"related":["ALSA-2026:10711","ALSA-2026:10745","ALSA-2026:10774","ALSA-2026:10949","ALSA-2026:10950","ALSA-2026:11062","ALSA-2026:11077","ALSA-2026:19019","ALSA-2026:19064","ALSA-2026:19175","ALSA-2026:19176","ALSA-2026:19177","ALSA-2026:19216","ALSA-2026:28247","ALSA-2026:28581","CGA-3hm5-gv2v-vgw8","SUSE-SU-2026:1715-1","SUSE-SU-2026:1818-1","SUSE-SU-2026:1937-1","SUSE-SU-2026:1947-1","SUSE-SU-2026:2055-1","SUSE-SU-2026:22959-1","SUSE-SU-2026:23191-1","SUSE-SU-2026:23212-1","SUSE-SU-2026:2387-1","SUSE-SU-2026:2464-1","SUSE-SU-2026:2664-1","SUSE-SU-2026:3104-1","SUSE-SU-2026:3132-1","SUSE-SU-2026:3855-1","openSUSE-SU-2026:10647-1","openSUSE-SU-2026:10648-1","openSUSE-SU-2026:10667-1","openSUSE-SU-2026:11068-1","openSUSE-SU-2026:11100-1","openSUSE-SU-2026:11181-1","openSUSE-SU-2026:21459-1"],"summary":"Incomplete mitigation of CVE-2026-4519, %action expansion for command injection to webbrowser.open()","details":"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.","affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/python/cpython","events":[{"introduced":"0"},{"introduced":"deaf509e8fc6e0363bd6f26d52ad42f976ec42f2"},{"introduced":"0fb18b02c8ad56299d6a2910be0bab8ad601ef24"},{"introduced":"60403a5409ff2c3f3b07dd2ca91a7a3e096839c7"},{"introduced":"b092705907c758d4f9742028652c9802f9f03dd3"},{"introduced":"f31a89bb901067dd105b00cfa90523cf7ffdbbdd"},{"fixed":"3a19c2f0b3e91ce8f23d0cc64d4c9ee557823f24"},{"fixed":"41388c9cb160d0886d5ca00d2e6c8782608a4549"},{"fixed":"2abcf904b8dac8c999d2b3aac76681abb333798a"},{"fixed":"fd17997c3866d61e0e7bd8201b1d8f35b40a40bd"},{"fixed":"a68a9190498a16ab1a5c9012ef5a70df81a5b328"},{"fixed":"f31a89bb901067dd105b00cfa90523cf7ffdbbdd"},{"fixed":"28b4ad38067bbdad34edfcd03ad2de5f06387e53"},{"fixed":"a4d3edf3a6ecfde504d02126410d2a65a859b744"},{"fixed":"c5767a72838a8dda9d6dc5d3558075b055c56bca"},{"fixed":"d22922c8a7958353689dc4763dd72da2dea03fff"},{"fixed":"d6d68494be70bdbda20f89f83801ba52ec37daa4"},{"fixed":"f4654824ae0850ac87227fb270f9057477946769"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"3.10.21"},{"introduced":"3.11.0"},{"fixed":"3.11.16"},{"introduced":"3.12.0"},{"fixed":"3.12.14"},{"introduced":"3.13.0"},{"fixed":"3.13.14"},{"introduced":"3.14.0a1"},{"fixed":"3.14.5rc1"},{"introduced":"3.15.0a1"},{"fixed":"3.15.0b1"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v3.13.13","v3.14.4","v3.15.0a8","v3.15.0a7","v3.12.13","v3.10.20","v3.11.15","v3.15.0a6","v3.13.12","v3.14.3","v3.15.0a5","v3.15.0a4","v3.15.0a3","v3.14.2","v3.13.11","v3.13.10","v3.14.1","v3.15.0a2","v3.15.0a1","v3.13.8","v3.11.14","v3.10.19","v3.12.12","v3.14.0","v3.14.0rc3","v3.13.7","v3.14.0rc2","v3.13.6","v3.14.0rc1","v3.14.0b4","v3.14.0b3","v3.13.5","v3.13.4","v3.11.13","v3.10.18","v3.12.11","v3.14.0b2","v3.14.0b1","v3.13.3","v3.11.12","v3.12.10","v3.10.17","v3.13.2","v3.12.9","v3.13.1","v3.12.8","v3.10.16","v3.11.11","v3.13.0","v3.12.7","v3.11.10","v3.10.15","v3.12.6","v3.12.5","v3.12.4","v3.12.3","v3.11.9","v3.10.14","v3.12.2","v3.11.8","v3.12.1","v3.11.7","v3.11.6","v3.12.0","v3.11.5","v3.10.13","v3.11.4","v3.10.12","v3.10.11","v3.11.3","v3.10.10","v3.11.2","v3.10.9","v3.11.1","v3.11.0rc2","v3.10.8","v3.10.7","v3.11.0rc1","v3.10.6","v3.11.0b5","v3.11.0b4","v3.10.5","v3.11.0b3","v3.11.0b2","v3.11.0b1","v3.11.0a7","v3.10.4","v3.10.3","v3.11.0a6","v3.11.0a5","v3.11.0a4","v3.10.2","v3.11.0a3","v3.10.1","v3.10.0rc2","v3.10.0rc1","v3.10.0b4","v3.10.0b3","v3.10.0b2","v3.10.0b1","v3.10.0a7","v3.10.0a1","v3.9.0a2","v3.7.0a2","v3.6.0b1","v3.6.0a3","v3.5.0b1","v3.5.0a4","v3.5.0a3","v3.5.0a2","v3.5.0a1","v3.4.0b3","v3.4.0b2","v3.4.0b1","v3.4.0a4","v3.4.0a3","v3.4.0a2","v3.4.0a1","v3.3.0rc3","v3.3.0rc2","v3.3.0rc1","v3.3.0b2","v3.3.0b1","v3.3.0a4","v3.3.0a3","v3.3.0a2","v3.2rc3","v3.2rc2","v3.2rc1","v3.2b2","v3.2b1","v3.2a4","v3.2a3","v3.2a2","v3.2a1","v3.1","v3.1rc2","v3.1rc1","v3.1b1","v3.1a2","v3.1a1","v3.0rc3","v3.0rc2","v3.0rc1","v3.0b3","v3.0b2","v3.0b1","v3.0a5","v3.0a4","v3.0a3","v3.0a2","v3.0a1","v2.4","v2.4c1","v2.4b2","v2.4b1","v2.4a3","v2.4a2","v2.4a1","v2.3c2","v2.3c1","v2.2a3","v2.1","v2.1c2","v2.1c1","v2.1b2","v2.1b1","v2.1a2","v2.1a1","v2.0","v2.0c1","v2.0b2","v2.0b1","v1.6a2","v1.6a1","v1.5.2","v1.5.2c1","v1.5.2b2","v1.5.2b1","v1.5.2a2","v1.5.2a1","v1.5.1","v1.5","v1.5b2","v1.5b1","v1.5a4","v1.5a3","v1.5a2","v1.5a1","v1.4","v1.4b3","v1.4b2","v1.4b1","v1.3","v1.3b1","v1.2","v1.2b4","v1.2b3","v1.2b2","v1.2b1","v1.1.1","v1.1","v1.0.2","v1.0.1","v0.9.9","v0.9.8"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-4786.json"}}],"references":[{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4786.json"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:10117"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:10140"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:10141"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:10711"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:10745"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:10774"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:10949"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:10950"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:11062"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:11077"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:11768"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:13692"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:13812"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:14652"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:14653"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:14656"},{"type":"ADVISORY","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