Medium severityPythonSensitive Data ExposureMEDIUM confidence
Flask Traceback In Response
A formatted traceback is built inside a request handler and risks being sent to the client (CWE-209).
Standards mapping
- OWASP Top 10
- A05:2021 - Security Misconfiguration
- OWASP ASVS
- V14.3.2 (L1)
Vulnerable vs. safe
Flagged by this check
tb = traceback.format_exc()Passes - the safe pattern
logger.exception("Unhandled error in view")Why it matters & how to fix it
A formatted traceback is built inside a request handler and risks being sent to the client (CWE-209). Stack traces expose source structure and internals. Log the traceback server-side and return a generic error response with no traceback.
References
Rule ID integsec-python-flask-traceback-in-response - engine: Opengrep - license: MIT - Copyright (c) IntegSec Inc.
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