flask vulnerabilities
CVEs whose affected-version data names the flask package (pip). Each record lists the affected and patched versions; check a specific version with the dependency checker or POST /api/sbom.
3 CVEsRSS
CVE-2026-27205LowFlask 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
▾ Sunlitflask · flaskEPSS 0.36%via OSV
CVE-2025-47278LowFlask uses fallback key instead of current signing key
Flask uses fallback key instead of current signing key
▾ Sunlitflask · flaskEPSS 0.18%via OSV
CVE-2023-30861High· 7.5PoCFlask vulnerable to possible disclosure of permanent session cookie due to missing Vary: Cookie header
Flask vulnerable to possible disclosure of permanent session cookie due to missing Vary: Cookie header
▾ Midnightflask · flaskEPSS 1.3%via OSV