CVE-2025-54795Network attack vector

Command execution via echo parsing confirmation bypass

Published Aug 5, 2025 · Updated Aug 5, 2025

Command injection in Claude Code before 1.0.20 allows remote attackers to execute untrusted commands through a confirmation bypass. An error while parsing an echo command causes the confirmation prompt to be bypassed, but Anthropic has not published the faulty parser operation. Exploitation requires untrusted content in the context window and a user session that passively processes it, exposing the user's local data and command privileges.

CVSS severity8.7
High
EPSS probability1.00%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in Claude Code before 1.0.20 allows remote attackers to execute untrusted commands through a confirmation bypass. An error while parsing an echo command causes the confirmation prompt to be bypassed, but Anthropic has not published the faulty parser operation. Exploitation requires untrusted content in the context window and a user session that passively processes it, exposing the user's local data and command privileges.

The record

CVE
CVE-2025-54795
Published
Aug 5, 2025
Updated
Aug 5, 2025
Vendor
Anthropic
Product
Claude Code
Classifications
CWE-78, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 5, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.0.20

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Anthropic · Claude Codeversion=< 1.0.20

Published CVSS scores

8.7GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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