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🛡️ Sentinel: [improvement] Enhance CSV formula injection prevention - #235

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sentinel-csv-formula-injection-fix-1413585240505755822
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sentinel-csv-formula-injection-fix-1413585240505755822

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@d0linger

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🚨 Severity: MEDIUM
💡 Vulnerability: Potential CSV formula injection via % and | triggers.
🎯 Impact: Exported CSV files containing user-entered text starting with % or | could trigger formula evaluation or DDE execution in spreadsheet viewers.
🔧 Fix: Added % and | to the sanitized prefix triggers in csvSafe.
✅ Verification: Added unit test cases to TestCSVSafe and ran go test ./... (all tests pass).


PR created automatically by Jules for task 1413585240505755822 started by @d0linger

Update csvSafe in internal/server/export.go to sanitize strings starting
with % or | after trimming leading whitespace, preventing CSV formula
injection when exported CSVs are opened in Excel or LibreOffice. Added
unit tests in internal/server/cookie_test.go.

Co-authored-by: d0linger <61334677+d0linger@users.noreply.github.com>
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@d0linger

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Superseded by #239

@d0linger d0linger closed this Oct 15, 2026
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Superseded by #239

Understood. Acknowledging that this work is superseded and stopping work on this task.

@d0linger
d0linger deleted the sentinel-csv-formula-injection-fix-1413585240505755822 branch October 26, 2026 18:33
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