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Claude Code vulnerability allows code execution outside macOS sandbox

By PulseAugur Editorial · [1 sources] ·

A security vulnerability, CVE-2026-88968, has been identified in Claude Code versions prior to 2.1.251, specifically affecting macOS users. The flaw allowed malicious code within the Bash sandbox to manipulate directory permissions, enabling unauthorized file modifications outside the designated workspace. This is the second such vulnerability in Claude Code's file writing mechanisms within a three-week period, highlighting a recurring issue with the time-of-check to time-of-use race condition. AI

IMPACT This vulnerability could allow attackers to compromise user files and system configurations on macOS, necessitating prompt updates for Claude Code users.

RANK_REASON The item describes a specific security vulnerability in a software product.

Read on dev.to — Claude Code tag →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Claude Code vulnerability allows code execution outside macOS sandbox

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33 / 100
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Tool
The item describes a specific security vulnerability in a software product.
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product, safety
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High
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Breaking (< 6h)
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COVERAGE [1]

  1. dev.to — Claude Code tag TIER_1 English(EN) · Rulestack ·

    Claude Code below 2.1.251 let code in its Bash sandbox redirect an Edit outside the workspace on macOS (CVE-2026-88968)

    <blockquote> <p>Claude Code's sandbox isolates shell commands, and its file tools run outside it. CVE-2026-88968, published on 2026-10-26 and fixed in 2.1.251, used the gap between the two on macOS: code running inside the Bash sandbox could swap a folder for a symlink after the …

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