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| 142 | + | for merchant_id, txn_group in groupby( |
| 143 | + | pending_transactions, key=lambda txn: txn.merchant_id |
| 144 | + | ): |
itertools.groupby without sorting causes incorrect grouping
The code uses itertools.groupby on pending_transactions, a queryset without a guaranteed order. groupby only groups consecutive elements with the same key. If transactions for the same merchant are not adjacent, they will be settled in separate batches, leading to duplicate payouts.
Add a sort operation on pending_transactions by merchant_id before the groupby call. This ensures all transactions for the same merchant are grouped together for a single settlement.
| 78 | + | result = subprocess.run( |
| 79 | + | cmd, |
| 80 | + | shell=True, |
| 81 | + | capture_output=True |
Potential command injection vulnerability with shell=True
Using subprocess.run with shell=True to generate invoice PDFs can lead to command injection if the cmd variable includes merchant-supplied data such as invoice numbers or company names. This is a security risk that could allow attackers to execute arbitrary commands on the server.
Consider using shell=False and passing the command as a list of arguments instead. This prevents shell interpretation of special characters in merchant-provided input.
| 53 | + | api_key = request.headers.get("X-Api-Key") |
| 54 | + | if api_key: |
| 55 | + | merchant = db.query(Merchant).filter(Merchant.api_key == api_key).first() |
API key comparison vulnerable to timing attacks
The merchant API key is compared directly using == which is vulnerable to timing attacks. An attacker could potentially recover the key character by character by measuring response time differences, compromising merchant accounts and payment data.
Use a constant-time comparison function like secrets.compare_digest() to prevent timing-based side-channel attacks on sensitive API key comparisons.
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String-based query with JSON_EXTRACT risks SQL injection
The code constructs an SQL DELETE statement by directly formatting self.table_name into the query string and using user-controllable parameters with JSON_EXTRACT.
| 472 | with self._get_cursor() as cur: |
| 473 | try: |
| 474 | # Use JSON_EXTRACT for JSON field access |
| 475 | cur.execute( |
| 476 | f"DELETE FROM `{self.table_name}` WHERE JSON_EXTRACT(meta, %s) = %s", 1 |
| 477 | (f"$.{key}", value), |
| 478 | ) |
| 479 | except Exception as e: |
| 480 | logger.warning("Error deleting by metadata field: %s", e) |
| 481 | raise |
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Fix the high-severity _check_milestones call outside transaction risk in contrib/referrals/team_referral.py to prevent inconsistent states.
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DeepSource reviewed changes in the commit range
b76c8fa...63debb2on this pull request. Below is the summary for the review, and you can see the individual issues we found as review comments.