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arXiv · 2608.15092

WeSCE: A Benchmark for Measuring Security Drift in LLM-Driven Code Editing

Zhiyu Zhang·Tingyue Wen·Senke Sun·Dengxiang Liang·Enhao Huang
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Abstract

In this work, we introduce WeSCE, a benchmark for quantifying security drift in code editing under weak-security constraints, where tasks specify only functional objectives without explicit security requirements. WeSCE consists of 400 executable programs derived from real-world code, covering feature addition, feature removal, bug fixing, and refactoring. To quantify security drift, we propose a continuous risk representation that aggregates heterogeneous vulnerability signals through a unified formulation, and define drift measures capturing changes in overall risk, worst-case severity, and vulnerability distribution under code transformations, providing a multi-scale view of security spanning average-case behavior to worst-case emphasis.

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Zhiyu Zhang, Tingyue Wen, Senke Sun, Dengxiang Liang, Enhao Huang. 2026-08-15. WeSCE: A Benchmark for Measuring Security Drift in LLM-Driven Code Editing. https://arxiv.org/abs/2608.15092

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