Threat Intelligence / CVE / CVE-2025-59536

CVE-2025-59536 — Anthropic Claude Code

CVSS v3.1 8.8 (HIGH) · CVSS v4.0 8.7 · EPSS 0.0% (higher than 7.1% of all scored CVEs) · Priority 4.7/10 · Published 2025-10-03

As of 2025-10-23, CVE-2025-59536 is a HIGH-severity vulnerability in Anthropic Claude Code, CVSS v3.1 8.8, EPSS 0.0% (7.1th percentile). Threadlinqs Intelligence links 3 tracked threat campaigns to CVE-2025-59536, most recently “NVIDIA Releases SkillSpector: Open-Source Security Scanner for AI Agent Skills”.

Last updated: 2025-10-23

What is CVE-2025-59536?

Claude Code is an agentic coding tool. Versions before 1.0.111 were vulnerable to Code Injection due to a bug in the startup trust dialog implementation. Claude Code could be tricked to execute code contained in a project before the user accepted the startup trust dialog. Exploiting this requires a user to start Claude Code in an untrusted directory. 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. This issue is fixed in version 1.0.111.

The record classifies CVE-2025-59536 under weakness class CWE-94. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs a user to take an action first, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 344 days ago.

Severity and exploitation probability

CVSS v3.1 base score: 8.8 — HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0 base score: 8.7
EPSS (FIRST): 0.0% probability of exploitation in the next 30 days, higher than 7.1% of all scored CVEs
CISA KEV: Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority: 4.7/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published: 2025-10-03, last modified 2025-10-23

Is CVE-2025-59536 being exploited?

It currently carries a trending score of 7 in the Threadlinqs vulnerability feed.

Affected products and versions

Anthropic: Claude Code

How to fix CVE-2025-59536

The record marks a vendor fix as available for CVE-2025-59536. Patch reference: https://github.com/anthropics/claude-code/security/advisories/GHSA-4fgq-fpq9-mr3g. Vendor advisory: https://github.com/anthropics/claude-code/security/advisories/GHSA-4fgq-fpq9-mr3g. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

Threat activity tracking CVE-2025-59536

3 tracked threats in the Threadlinqs corpus reference CVE-2025-59536, either in the campaign’s CVE list or as an indicator on the campaign record.

NVIDIA Releases SkillSpector: Open-Source Security Scanner for AI Agent Skills — LOW · 2026-08-03
Internet-Wide Reconnaissance Scans Target MCP Servers and Claude/Cursor AI-Agent Credentials — MEDIUM · 2026-07-13
Claude Code RCE & API Key Exfiltration — CVE-2025-59536 + CVE-2026-21852, Untrusted Repo Attack Surface via Hooks, MCP Servers & Environment Variables — HIGH · 2026-02-26

Sources

Seeded from research and not yet processed by the Threadlinqs enrichment pipeline, so blank CVSS, EPSS or KEV fields above mean NOT MEASURED rather than measured-absent.

github.com

Full detection coverage & IOCs for threats exploiting CVE-2025-59536 are available via the Threadlinqs MCP server (Purple tier). View plans →

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