Flask-Reuploaded: Extension-denylist bypass via case-folding asymmetry in name-override path (incomplete-fix variant ...
High-risk advisory
CVE-2026-54567
Summary
Flask-Reuploaded: Extension-denylist bypass via case-folding asymmetry in name-override path (incomplete-fix variant of CVE-2026-27641)
Why it matters
GitHub has published a reviewed security advisory for Flask-Reuploaded. Prioritize it with other application dependency updates.
Operator check
Check whether Flask-Reuploaded is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available.
Sources
PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.