PT-2026-50594 · Anthropic · Claude-Code

Novee · CVE-2026-54316 · Published 2026-06-17 · Updated 2026-07-22

Positive Technologies (AI Summary)

CVSS v3.1

9.1

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Name of the Vulnerable Software and Affected Versions Claude Code versions 0.2.54 through 2.1.162

Description The WebFetch tool pre-approved the hostname 'huggingface.co' as a bare hostname, allowing any path on that domain to be auto-approved without a permission prompt or restrictions from --allowedTools. An attacker capable of injecting untrusted content into the context window could direct the tool to make requests to attacker-controlled repository files, such as '/resolve/main/config.json'. Since HuggingFace records these as server-side downloads, this creates a covert out-of-band channel to exfiltrate sensitive data, including files, environment variables, or command output.

Recommendations Update to version 2.1.163.

Exploit

Fix

Information Disclosure

Weakness Enumeration

CWE-515

CWE-183

CWE-200

Related Identifiers

CVE-2026-54316

GHSA-FG94-H982-F3MM

Affected Products

Claude-Code

References · 7

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54316.json · Exploit
• https://osv.dev/vulnerability/CVE-2026-54316 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-54316 · Security Note
• https://osv.dev/vulnerability/GHSA-fg94-h982-f3mm · Vendor Advisory
• https://github.com/anthropics/claude-code · Note
• https://github.com/anthropics/claude-code/security/advisories/GHSA-fg94-h982-f3mm · Note
• https://reddit.com/r/secops_solution/comments/1v3j3ba/patch_wednesday_day_129_claude_code_cve202654316 · Reddit Post