Flask-AppBuilder open redirect vulnerability using HTTP host injection
GHSA-99pm-ch96-ccp2 · CVE-2025-32962 · PYSEC-2026-1379
Published · Modified
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Description
Impact
Flask-AppBuilder prior to 4.6.2 would allow for a malicious unauthenticated actor to perform an open redirect by manipulating the Host header in HTTP requests.
Patches
Flask-AppBuilder 4.6.2 introduced the FAB_SAFE_REDIRECT_HOSTS configuration variable, which allows administrators to explicitly define which domains are considered safe for redirection.
Examples:
FAB_SAFE_REDIRECT_HOSTS = ["yourdomain.com", "sub.yourdomain.com", "*.yourcompany.com"]
Workarounds
Use a Reverse Proxy to Enforce Trusted Host Headers
References
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References
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