# CVE-2025-59829 — anthropics claude-code

> As of 2025-10-03, CVE-2025-59829 is a Low-severity (band derived from the CVSS v4.0 score, not stated by the CNA) vulnerability in anthropics claude-code, CVSS v4.0 2.3, EPSS 0.4% (36.9th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2025-59829, most recently “Claude Code Symlink Flaw in Startup Memory Loader Enables Silent File Exfiltration via CLAUDE.md Imports”.

**Last updated:** 2025-10-03

## What is CVE-2025-59829?

Claude Code is an agentic coding tool. Versions below 1.0.120 failed to account for symlinks when checking permission deny rules. If a user explicitly denied Claude Code access to a file and Claude Code had access to a symlink pointing to that file, it was possible for Claude Code to access the file. 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 1.0.120.

The record classifies CVE-2025-59829 under weakness class [CWE-61](https://cwe.mitre.org/data/definitions/61.html). 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 372 days ago.

## Severity and exploitation probability

- **CVSS v4.0 base score:** 2.3 — Low (derived from score) (`CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N`)
- **EPSS (FIRST):** 0.4% probability of exploitation in the next 30 days, higher than 36.9% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 2.6/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2025-10-03

## Is CVE-2025-59829 being exploited?

It currently carries a trending score of 14 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [anthropics](https://intel.threadlinqs.com/vendors/anthropics): claude-code

## How to fix CVE-2025-59829

No vendor patch reference has been recorded for CVE-2025-59829 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2025-59829

1 tracked threat in the Threadlinqs corpus references CVE-2025-59829, either in the campaign’s CVE list or as an indicator on the campaign record.

- [Claude Code Symlink Flaw in Startup Memory Loader Enables Silent File Exfiltration via CLAUDE.md Imports](https://intel.threadlinqs.com/threat/TL-2026-1718) — MEDIUM · 2026-07-27

## Sources

Enriched from CVE.org, FIRST EPSS. Last verified by Threadlinqs on 2026-10-10.

**Vendor advisory and patch**

- [github.com](https://github.com/anthropics/claude-code/security/advisories/GHSA-66m2-gx93-v996)

Canonical: https://intel.threadlinqs.com/cve/CVE-2025-59829
Full detection coverage and IOCs for threats exploiting CVE-2025-59829 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp