{"id":"PSF-2019-9","summary":"urlsplit does not handle NFKC normalization","details":"Python 2.7.x through 2.7.16 and 3.x through 3.7.2 is affected by: Improper Handling of Unicode Encoding (with an incorrect netloc) during NFKC normalization. The impact is: Information disclosure (credentials, cookies, etc. that are cached against a given hostname). The components are: urllib.parse.urlsplit, urllib.parse.urlparse. The attack vector is: A specially crafted URL could be incorrectly parsed to locate cookies or authentication data and send that information to a different host than when parsed correctly. This is fixed in: v2.7.17, v2.7.17rc1, v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1, v3.5.7, v3.5.8, v3.5.8rc1, v3.5.8rc2, v3.5.9; v3.6.10, v3.6.10rc1, v3.6.11, v3.6.11rc1, v3.6.12, v3.6.9, v3.6.9rc1; v3.7.3, v3.7.3rc1, v3.7.4, v3.7.4rc1, v3.7.4rc2, v3.7.5, v3.7.5rc1, v3.7.6, v3.7.6rc1, v3.7.7, v3.7.7rc1, v3.7.8, v3.7.8rc1, v3.7.9.","aliases":["CVE-2019-9636"],"modified":"2026-05-18T05:46:31.405120560Z","published":"2019-03-08T21:00:00Z","database_specific":{"cwe_ids":[]},"references":[{"type":"REPORT","url":"https://bugs.python.org/issue36216"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/python/cpython","events":[{"introduced":"0"},{"fixed":"16e6f7dee7f02bb81aa6b385b982dcdda5b99286"},{"fixed":"23fc0416454c4ad5b9b23d520fbe6d89be3efc24"},{"fixed":"c0d95113b070799679bcb9dc49d4960d82e8bb08"},{"fixed":"daad2c482c91de32d8305abbccc76a5de8b3a8be"},{"fixed":"e37ef41289b77e0f0bb9a6aedb0360664c55bdd5"}]}],"versions":["v3.5.7rc1","v2.7.16rc1","v3.6.8","v3.7.2rc1","v3.6.8rc1","v3.5.6","v3.5.6rc1","v3.7.0rc1","v3.6.6rc1","v3.7.0b5","v3.7.0b4","v2.7.15rc1","v3.7.0b3","v3.7.0b2","v3.5.5","v3.5.5rc1","v3.7.0b1","v3.7.0a2","v3.5.4","v3.5.4rc1","v3.6.2rc1","v3.5.3","v3.5.3rc1","v3.6.0rc1","v2.7.13rc1","v3.6.0b4","v3.6.0b3","v3.6.0b1","v3.6.0a3","v3.5.2","v3.5.2rc1","v2.7.12rc1","v3.5.1rc1","v2.7.11rc1","v3.5.0rc3","v3.5.0rc2","v3.5.0rc1","v3.5.0b4","v3.5.0b3","v3.5.0b1","v2.7.10rc1","v3.5.0a4","v3.5.0a3","v3.5.0a2","v3.5.0a1","v2.7.9rc1","v2.7.8","v3.4.0b3","v3.4.0b2","v3.4.0b1","v2.7.6rc1","v3.4.0a4","v3.4.0a3","v3.4.0a2","v3.4.0a1","v2.7.5","v2.7.4rc1","v3.3.0rc3","v3.3.0rc2","v3.3.0rc1","v3.3.0b2","v3.3.0b1","v3.3.0a4","v3.3.0a3","v3.3.0a2","v2.7.3rc1","v2.7.2rc1","v2.7","v3.2rc3","v3.2rc2","v3.2rc1","v3.2b2","v3.2b1","v2.7.1","v2.7.1rc1","v3.2a4","v3.2a3","v3.2a2","v3.2a1","v2.7rc2","v2.7rc1","v2.7b2","v2.7b1","v2.7a4","v2.7a3","v2.7a2","v2.7a1","v3.1","v3.1rc2","v3.1rc1","v3.1b1","v3.1a2","v3.1a1","v3.0rc3","v3.0rc2","v2.6","v2.6rc2","v3.0rc1","v2.6rc1","v3.0b3","v2.6b3","v2.6b2","v3.0b2","v2.6b1","v3.0b1","v2.6a3","v3.0a5","v2.6a2","v3.0a4","v3.0a3","v2.6a1","v3.0a2","v3.0a1","v2.5b3","v2.5b2","v2.5b1","v2.5a2","v2.5a1","v2.5a0","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://github.com/psf/advisory-database/blob/main/advisories/python/PSF-2019-9.json"}}],"schema_version":"1.7.5"}