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cve recordcritical

CVE-2026-54316

anthropic · claude code

Published
CVSS9.1
Severitycritical
WeaknessCWE-183
ExploitedNot in CISA KEV

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Description

Claude Code is an agentic coding tool. From 0.2.54 until 2.1.163, 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 variabl

References

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Our coverage of CVE-2026-54316

CVE-2026-12537critical

Claude Code and Gemini CLI Flaws Let a GitHub Issue Reach CI Workflow Secrets

Researchers discovered vulnerabilities in Anthropic's Claude Code and Google's Gemini CLI that allowed unprivileged attackers to execute code on CI runners. The flaws, which have been patched and assigned CVEs, involved issues with command validation and container launching. A separate finding related to OpenAI's Codex also allowed for the hijacking of agent runs, though OpenAI considers its sandbox to have behaved as documented.