CriticalVulnerabilityLLM-specific

CVE-2025-64755: Claude Code read-only validation bypass via sed command parsing

Source: NVD(opens in a new tab)
Identifier: CVE-2025-64755
Published: November 20, 2025
Record updated: October 9, 2026

Affected: @anthropic-ai/claude-code < 2.0.31
Fixed in: 2.0.31
released October 31, 2025, 21 days before disclosure
Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
EPSS: 0.6%

Summary

CVE-2025-64755 affects Claude Code, an agentic coding tool, before version 2.0.31. An error in sed command parsing let an attacker bypass the read-only validation and write to arbitrary files on the host system. GitHub, Inc. assigned a CVSS 4.0 base score of 8.7 (High) and classified the weakness as CWE-78 (OS Command Injection).

Mitigation

Fixed in version 2.0.31.

Details

Scores and exploitation

CVSS score: 9.8(critical)
Patch available: Yes
EPSS: 0.6%Estimated probability that this CVE is exploited in the next 30 days, from the FIRST Exploit Prediction Scoring System. Read on November 4, 2026.

Weaknesses and techniques

Weakness (CWE): CWE-78
Attack pattern (CAPEC): CAPEC-88

Affected

Packages: @anthropic-ai/claude-code@< 2.0.31 (fixed: 2.0.31)
Vendors: Anthropic

Classification

Attack type: Other
Attack sophistication: Trivial
AI component targeted: Agent
Impact: Integrity,
Confidentiality
Labels: security

How this record was produced

Summaries, mitigations and labels on this page are generated automatically from the source. The linked source is authoritative. The source gives this advisory a description and no title, so the title above is a headline generated from the source text.

Original source: https://nvd.nist.gov/vuln/detail/CVE-2025-64755

First tracked: February 15, 2026 at 08:52 PM ET, from NVD/CVE Database

Classifier: claude-haiku-5-5, prompt v4

Classifier confidence: 95% (self-assessed)

Topics

AI agents

Summary

Mitigation

Topics

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