{"id":"CVE-2026-17084","summary":"stringprep.map_table_b2() deviates from RFC 3454 Table B.2","details":"The \"stringprep\" module didn't process characters from RFC 3454 tables \nB.2 or B.3 correctly: the latest Unicode codepoint attributes were used \ninstead of the specified Unicode 3.2.0. This behavior would cause \nmismatches when processing domain names using IDNA 2003 (the \"idna\" \ncodec) and the in_table_b2() function of the \"stringprep\" module. This \nonly affects domain names containing characters that were not previously\n registered or had their Unicode attributes such as case-folding \nbehavior updated since Unicode 3.2.0.","aliases":["BIT-libpython-2026-17084","BIT-python-2026-17084","BIT-python-min-2026-17084","PSF-2026-37"],"modified":"2026-10-20T11:11:23.273298436Z","published":"2026-08-18T13:57:31.876Z","related":["SUSE-SU-2026:23743-1","SUSE-SU-2026:23845-1","SUSE-SU-2026:4396-1","SUSE-SU-2026:4401-1","SUSE-SU-2026:4411-1","SUSE-SU-2026:4534-1","SUSE-SU-2026:4630-1","SUSE-SU-2026:4633-1","SUSE-SU-2026:4743-1","SUSE-SU-2026:4744-1","openSUSE-SU-2026:11748-1","openSUSE-SU-2026:11817-1","openSUSE-SU-2026:11868-1","openSUSE-SU-2026:11886-1","openSUSE-SU-2026:11949-1","openSUSE-SU-2026:11975-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/17xxx/CVE-2026-17084.json","cna_assigner":"PSF"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/08/18/2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/17xxx/CVE-2026-17084.json"},{"type":"ADVISORY","url":"https://mail.python.org/archives/list/security-announce@python.org/thread/EUHHTC6EV7HCLSUHP25C5VHSV4V2MUZN/"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-17084"},{"type":"REPORT","url":"https://github.com/python/cpython/issues/155292"},{"type":"FIX","url":"https://github.com/python/cpython/commit/1e54caa096678a38afcabecabb1ff72400dd6bae"},{"type":"FIX","url":"https://github.com/python/cpython/commit/5181304bcec9cfc3c15311741c9154cdff2e3fd7"},{"type":"FIX","url":"https://github.com/python/cpython/commit/69f92ebaec681e9149dfd70fd02d4ed52d2a6296"},{"type":"FIX","url":"https://github.com/python/cpython/commit/7e109d084d55e7eb25837a5f3b47ef9beee547bc"},{"type":"FIX","url":"https://github.com/python/cpython/commit/c016c2535b74227fddf2cf7334dbfead6c930214"},{"type":"FIX","url":"https://github.com/python/cpython/commit/c28b121a4f0b975937c8b5a1b4934bb361d84296"},{"type":"FIX","url":"https://github.com/python/cpython/commit/c42790b34f634051750e5da340d17c7da19e4784"},{"type":"FIX","url":"https://github.com/python/cpython/commit/d397a4979cfc80a8cd6c73838aa10e9c8cf5ef72"},{"type":"FIX","url":"https://github.com/python/cpython/pull/155293"},{"type":"PACKAGE","url":"https://github.com/python/cpython"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/python/cpython","events":[{"introduced":"0"},{"fixed":"acb4dc12b6df8615af7b43120ef601e04072f7d2"},{"introduced":"deaf509e8fc6e0363bd6f26d52ad42f976ec42f2"},{"fixed":"e6392eb68a39cef49c9fe6431253050caa17a426"},{"introduced":"0fb18b02c8ad56299d6a2910be0bab8ad601ef24"},{"fixed":"e848e4b09ca4bc67c0041c9ce7526dae471d4c36"},{"introduced":"60403a5409ff2c3f3b07dd2ca91a7a3e096839c7"},{"fixed":"cbc944f4bc59639a444dd971c737788ba2283a91"},{"introduced":"ebf955df7a89ed0c7968f79faec1de49f61ed7cb"},{"fixed":"8e6e75d9102e39bed2a2b279203a396741180f12"},{"introduced":"f31a89bb901067dd105b00cfa90523cf7ffdbbdd"},{"fixed":"435c9e5a798c99653e3ab64ce29baed0e4f3dfee"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"3.10.22"},{"introduced":"3.11.0"},{"fixed":"3.11.17"},{"introduced":"3.12.0"},{"fixed":"3.12.15"},{"introduced":"3.13.0"},{"fixed":"3.13.16"},{"introduced":"3.14.0"},{"fixed":"3.14.8"},{"introduced":"3.15.0a1"},{"fixed":"3.15.0rc2"}],"source":"AFFECTED_FIELD"}}],"versions":["v3.11.16","v3.10.21","v3.12.14","v3.13.15","v3.14.7","v3.15.0rc1","v3.15.0b4","v3.15.0b3","v3.13.14","v3.14.6","v3.15.0b2","v3.14.5","v3.15.0b1","v3.14.5rc1","v3.13.13","v3.14.4","v3.12.13","v3.10.20","v3.11.15","v3.13.12","v3.14.3","v3.14.2","v3.13.11","v3.13.10","v3.14.1","v3.13.8","v3.11.14","v3.10.19","v3.12.12","v3.14.0","v3.13.7","v3.13.6","v3.13.5","v3.13.4","v3.11.13","v3.10.18","v3.12.11","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","v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