CVE-2026-46406
CVE-2026-46406 · Claude Code: Insecure Temporary File in /copy Command Enables Response Disclosure and Symlink-Based File Write
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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.
CVSS 4.4 · Moyenne · EPSS 0,2% · Correctif disponible
- Publication
- Mise à jour
Pile logicielle: node
Produits et versions concernés
claude-code
- Versions du logiciel
- >= 2.1.59, < 2.1.128: Concernée
Aucun correctif publié
@anthropic-ai/claude-code npm
- Plages de versions concernées
- SEMVER: ≥ 2.1.59, < 2.1.128
Mettez à jour vers 2.1.128