Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

CVE-2026-46406

Gravedad CVSS v4.0:
MEDIA
Tipo:
CWE-59 Incorrecta resolución de una ruta antes de aceder a un fichero (Seguimiento de enlaces)
Fecha de publicación:
29/06/2026
Última modificación:
30/06/2026

Descripción

*** Pendiente de traducción *** Claude Code is an agentic coding tool. From 2.1.59 until 2.1.128, the Claude Code /copy command wrote responses to a hardcoded, predictable path (/tmp/claude/response.md) without UID isolation, randomness, or symlink protection. The file was created world-readable (0644) in a world-traversable directory (0755), allowing any local user to read a privileged user's Claude response, which could contain secrets or credentials. Additionally, because the path was static and predictable, a local attacker could pre-create the directory and plant a symlink at the expected file path, causing the privileged process to follow the symlink and overwrite an attacker-chosen file with the response text. Exploiting this required a local unprivileged user on the same system and a privileged user to run the /copy command. This vulnerability is fixed in 2.1.128.

Productos y versiones vulnerables

CPE Desde Hasta
cpe:2.3:a:anthropic:claude_code:*:*:*:*:*:node.js:*:* 2.1.58 (incluyendo) 2.1.128 (excluyendo)