High severityPythonAuthentication & SecretsHIGH confidence
JWT Verify Disabled
JWT signature verification is disabled, so forged or tampered tokens are accepted (CWE-347).
Standards mapping
- OWASP Top 10
- A02:2021 - Cryptographic Failures
- OWASP ASVS
- V3.5.3 (L1)
Vulnerable vs. safe
Flagged by this check
return jwt.decode(token, key, verify=False)Passes - the safe pattern
return jwt.decode(token, key, algorithms=["HS256"])Why it matters & how to fix it
JWT signature verification is disabled, so forged or tampered tokens are accepted (CWE-347). Always verify: call jwt.decode() with the correct key, an explicit algorithms=[...] allow-list, and verify_signature enabled (the default).
References
Rule ID integsec-python-jwt-verify-disabled - engine: Opengrep - license: MIT - Copyright (c) IntegSec Inc.
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