CVE-2026-54316

描述

Because the hostname huggingface.co was pre-approved as a bare hostname for the WebFetch tool, any path on that domain—including attacker-controlled model repositories—was auto-approved without a permission prompt or being subject to --allowedTools restrictions. An attacker able to inject untrusted content into a Claude Code context could direct it to issue WebFetch requests against attacker-controlled repository files (e.g. /resolve/main/config.json), which HuggingFace counts as downloads server-side, creating a covert out-of-band channel for encoding and exfiltrating data Claude can access such as files, environment variables, or command output. Reliably exploiting this required the ability to add untrusted content into a Claude Code context window. Users on standard Claude Code auto-update have received this fix already; users performing manual updates are advised to update to the latest version. Thank you to hackerone.com/novee for reporting this issue.

如何修補 CVE-2026-54316

要修補 CVE-2026-54316,請將受影響套件升級到下列已修補版本。

• —升級至 2.1.163 或更新版本

CVE-2026-54316 正在被利用嗎?

低 — EPSS 為 0.4%,目前沒有觀察到大規模利用活動。

受影響套件(1)

• >= 0.2.54, < 2.1.163

CVSS 分數

參考連結(3)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2026-54316
• PATCHgithub.com/anthropics/claude-code
• WEBgithub.com/anthropics/claude-code/security/advisories/GHSA-fg94-h982-f3mm