How severe is CVE-2025-64755?

CVE-2025-64755 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-64755 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-64755?

CVE-2025-64755 affects Anthropic Claude Code. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-64755?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-64755 have an EU (EUVD) identifier?

Yes. CVE-2025-64755 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198355.

When was CVE-2025-64755 published?

CVE-2025-64755 was published on 2025-11-21 and last updated on 2026-06-17.

CVE-2025-64755

CVE-2025-64755 is a critical-severity vulnerability in Anthropic Claude Code with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 8.7
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-198355
Weakness: CWE-78
Affected product: Anthropic Claude Code
Published: 2025-11-21
Last modified: 2026-06-17

Description

Claude Code is an agentic coding tool. Prior to version 2.0.31, due to an error in sed command parsing, it was possible to bypass the Claude Code read-only validation and write to arbitrary files on the host system. This issue has been patched in version 2.0.31.

Frequently asked questions

What is CVE-2025-64755?: Claude Code is an agentic coding tool. Prior to version 2.0.31, due to an error in sed command parsing, it was possible to bypass the Claude Code read-only validation and write to arbitrary files on the host system. This issue has been patched in version 2.0.31.
How severe is CVE-2025-64755?: CVE-2025-64755 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-64755 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-64755?: CVE-2025-64755 affects Anthropic Claude Code. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-64755?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-64755 have an EU (EUVD) identifier?: Yes. CVE-2025-64755 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198355.
When was CVE-2025-64755 published?: CVE-2025-64755 was published on 2025-11-21 and last updated on 2026-06-17.

References

https://github.com/anthropics/claude-code/security/advisories/GHSA-7mv8-j34q-vp7q

Affected products (1)

cpe:2.3:a:anthropic:claude_code:*:*:*:*:*:node.js:*:*

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