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flask✕security

flask: Flask session does not add `Vary: Cookie` header when accessed in some ways

Flask session does not add `Vary: Cookie` header when accessed in some ways (low). GHSA-68rp-wp8r-4726, CVE-2026-27205, PYSEC-2026-2151.

flask: Flask session does not add `Vary: Cookie` header when accessed in some ways: from its source to your code

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Flask session does not add `Vary: Cookie` header when accessed in some ways

osv.dev/vulnerability/GHSA-68rp-wp8r-4…from an advisory databasechecked 2026-10-30#3c34ece7f8

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read by a advisory-feed · advisory/pypi/flask/GHSA-68rp-wp8r-4726