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CVE-2025-59828

Anthropic Claude Code broken access control

9.8 CRITICALEPSS 0.36%
  1. Published24 Sept 2025

Description

Claude Code is an agentic coding tool. Prior to Claude Code version 1.0.39, when using Claude Code with Yarn versions 2.0+, Yarn plugins are auto-executed when running yarn --version. This could lead to a bypass of the directory trust dialog in Claude Code, as plugins would be executed prior to the user accepting the risks of working in an untrusted directory. Users running Yarn Classic were unaffected by this issue. This issue has been fixed in version 1.0.39. Users on standard Claude Code auto-update will have received this fix automatically. Users performing manual updates are advised to update to the latest version.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Anthropic Claude Code< 1.0.39

Remediation

Fixed in
Anthropic Claude Code≥ 1.0.39

References

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Frequently asked

Is CVE-2025-59828 being actively exploited?

CVE-2025-59828 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.36%.

How severe is CVE-2025-59828?

CVE-2025-59828 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.36% probability of exploitation.

Which products are affected by CVE-2025-59828?

Affected products include Anthropic Claude Code.

How do I fix CVE-2025-59828?

Upgrade affected software to a fixed version, for example Anthropic Claude Code 1.0.39 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-59828 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.