Cyber Resilience

CVE-2025-54795

RCE in Anthropic Claude Code ≤ 1.0.20

Published
05 August 2025
Modified
17 June 2026
Patch / advisory
CVSS Score v4 8.7
Click a component to see what it means
Raw vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.0097 59th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2025-54795 is a high-severity OS Command Injection (CWE-78) vulnerability in Anthropic Claude Code. Its CVSS base score is 8.7 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Command and Scripting Interpreter (T1059); ranked in the top 41% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

This vulnerability is AI-related — categorised as Enterprise AI Assistants; in the LLM/Generative AI Risks risk domain.

The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and SI-10 (Information Input Validation) — see the control section below for these in your framework.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

CVE-2025-54795 is a high-severity vulnerability (CVSS 9.8, CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) affecting Claude Code, an agentic coding tool from Anthropic. Published on 2025-08-05, it arises from an error in command parsing in versions below 1.0.20, enabling attackers to bypass the tool's confirmation prompt and trigger execution of untrusted commands. The issue is classified under CWE-78 (Improper Neutralization of Special Elements used in an OS Command).

Attackers can exploit this vulnerability remotely over the network with low complexity, requiring no privileges or user interaction. Reliable exploitation depends on the ability to insert untrusted content into a Claude Code context window, potentially leading to arbitrary command execution with high impacts on confidentiality, integrity, and availability.

The vulnerability is addressed in Claude Code version 1.0.20. Additional details on mitigation and patches are available in the GitHub security advisory at https://github.com/anthropics/claude-code/security/advisories/GHSA-x56v-x2h6-7j34.

OWASP Top 10 for Web (2025)

EU & UK References

Vulnerability Data

Claude Code is an agentic coding tool. In versions below 1.0.20, an error in command parsing makes it possible to bypass the Claude Code confirmation prompt to trigger execution of an untrusted command. Reliably exploiting this requires the ability to…

more

add untrusted content into a Claude Code context window. This is fixed in version 1.0.20.

CWE(s)

AI Security AnalysisAI

AI Category
Enterprise AI Assistants
Risk Domain
LLM/Generative AI Risks
OWASP Top 10 for LLMs 2025
None mapped
AI-specific weaknesses CR
  • CWE-1427 — Untrusted context input bypasses confirmation; model output reaches command sink.
Mapped by Cyber Resilience · not in NVD. Poisoning and extraction cases are routed to MITRE ATLAS instead of a synthetic CWE.
Classification Reason
Matched keywords: claude

Related Threats

MITRE ATT&CK Enterprise Techniques

T1059 Command and Scripting Interpreter Execution
Adversaries may abuse command and script interpreters to execute commands, scripts, or binaries.
T1059.003 Windows Command Shell Execution
Adversaries may abuse the Windows command shell for execution.
T1059.004 Unix Shell Execution
Adversaries may abuse Unix shell commands and scripts for execution.
T1059.001 PowerShell Execution
Adversaries may abuse PowerShell commands and scripts for execution.
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2025-64755Same product: Anthropic Claude Code
CVE-2025-55284Same product: Anthropic Claude Code
CVE-2026-25722Same product: Anthropic Claude Code
CVE-2026-25723Same product: Anthropic Claude Code
CVE-2026-24887Same product: Anthropic Claude Code
CVE-2026-55607Same product: Anthropic Claude Code
CVE-2025-66032Same product: Anthropic Claude Code
CVE-2026-40068Same product: Anthropic Claude Code
CVE-2025-59041Same product: Anthropic Claude Code
CVE-2025-58764Same product: Anthropic Claude Code

Affected Assets

anthropic
claude code
≤ 1.0.20

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

Detect
Catch it (NIST detect / respond)

Harden
Shrink the surface (DISA STIG)

Validate
Prove the fix (OWASP ASVS)
  • V1.2.5
  • V1.2.8
  • V15.2.5

Mitigating Controls (NIST 800-53 r5) AI

Developer testing and evaluation can discover missing or incorrect command sanitization during development.

Input validation directly neutralizes or rejects special characters that would otherwise alter OS command structure.

Least privilege reduces the permissions available to any process that could be subverted by injected commands.

Least functionality restricts available OS commands and interpreters, limiting the blast radius of injection.

Secure engineering principles require proper neutralization of untrusted input before command construction.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

PR.PS-06's SDLC practices directly require secure coding and input handling that blocks command-injection defects, yet the single broad outcome leaves many specific neutralization vectors and verification gaps unaddressed.

PR.PS-02 partial match
prevents

Routine patching/maintenance can remediate known command-injection CVEs in dependencies (partial forward) but does nothing to stop developers from introducing improper neutralization in custom code (none reverse).

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

finds

Security testing and code review target insecure use of operating-system command interfaces, catching command-injection flaws introduced during development.

References