AI / ML CVE-2026-25723
MEDIUM
GHSA-mhg7-666j-cqg4
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Lifecycle Timeline
3Blast Radius
ecosystem impact- 4 npm packages depend on @anthropic-ai/claude-code (4 direct, 0 indirect)
Ecosystem-wide dependent count for version 2.0.55.
DescriptionGitHub Advisory
Claude Code is an agentic coding tool. Prior to version 2.0.55, Claude Code failed to properly validate commands using piped sed operations with the echo command, allowing attackers to bypass file write restrictions. This vulnerability enabled writing to sensitive directories like the .claude folder and paths outside the project scope. Exploiting this required the ability to execute commands through Claude Code with the "accept edits" feature enabled. This issue has been patched in version 2.0.55.
AnalysisAI
Claude Code versions prior to 2.0.55 insufficiently validate piped sed commands, permitting authenticated users to circumvent file write protections and deposit files in restricted directories including .claude folders and locations outside project scope. An attacker with access to the "accept edits" feature can exploit this to write malicious content to sensitive areas of the system. A patch is available in version 2.0.55 and later.
Technical ContextAI
Classified as CWE-20 (Improper Input Validation). Affects Claude Code. Claude Code is an agentic coding tool. Prior to version 2.0.55, Claude Code failed to properly validate commands using piped sed operations with the echo command, allowing attackers to bypass file write restrictions. This vulnerability enabled writing to sensitive directories like the .claude folder and paths outside the project scope. Exploiting this required the ability to execute commands through Claude Code with the "accept edits" feature enabled. This issue has been patched in version 2.0.5
RemediationAI
Fixed in version 2.0.55.. Restrict network access to the affected service where possible.
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Same weakness CWE-20 – Improper Input Validation
View allSame technique Code Injection
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External POC / Exploit Code
Leaving vuln.today