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werkzeug✕security

werkzeug: Werkzeug safe_join() allows Windows special device names with compound extensions

Werkzeug safe_join() allows Windows special device names with compound extensions (moderate). GHSA-87hc-h4r5-73f7, CVE-2026-21860, PYSEC-2026-2044.

werkzeug: Werkzeug safe_join() allows Windows special device names with compound extensions: from its source to your code

osv.devquote checked
security advisory
Your codeby hand
Nemotron fixes

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Werkzeug safe_join() allows Windows special device names with compound extensions

osv.dev/vulnerability/GHSA-87hc-h4r5-7…from an advisory databasechecked 2026-10-30#2975f81206

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read by a advisory-feed · advisory/pypi/werkzeug/GHSA-87hc-h4r5-73f7