# CVE-2026-25724 — anthropics claude-code

> As of 2026-03-27, CVE-2026-25724 is a HIGH-severity vulnerability in anthropics claude-code, CVSS v3.1 7.5, EPSS 0.6% (50.3th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-25724, most recently “Claude Code Symlink Flaw in Startup Memory Loader Enables Silent File Exfiltration via CLAUDE.md Imports”.

**Last updated:** 2026-03-27

## What is CVE-2026-25724?

Claude Code is an agentic coding tool. Prior to version 2.1.7, Claude Code failed to strictly enforce deny rules configured in settings.json when accessing files through symbolic links. If a user explicitly denied Claude Code access to a file (such as /etc/passwd) and Claude Code had access to a symbolic link pointing to that file, it was possible for Claude Code to read the restricted file through the symlink without triggering deny rule enforcement. This issue has been patched in version 2.1.7.

The record classifies CVE-2026-25724 under weakness classes [CWE-61](https://cwe.mitre.org/data/definitions/61.html), [CWE-285](https://intel.threadlinqs.com/cwe/CWE-285). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 246 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 7.5 — HIGH (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **CVSS v4.0 base score:** 2.3 (`CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N`)
- **EPSS (FIRST):** 0.6% probability of exploitation in the next 30 days, higher than 50.3% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 5.8/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-02-06, last modified 2026-03-27

## Is CVE-2026-25724 being exploited?

It currently carries a trending score of 18 in the Threadlinqs vulnerability feed.

## Affected products and versions

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

Affected software packages:

- `npm:@anthropic-ai/claude-code` — patched in 2.1.7

## How to fix CVE-2026-25724

Fixed versions are recorded for 1 package: npm:@anthropic-ai/claude-code 2.1.7. No vendor patch reference has been recorded for CVE-2026-25724 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-2026-25724

1 tracked threat in the Threadlinqs corpus references CVE-2026-25724, 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, NVD, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-10-10. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [github.com](https://github.com/anthropics/claude-code/security/advisories/GHSA-4q92-rfm6-2cqx)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-25724
Full detection coverage and IOCs for threats exploiting CVE-2026-25724 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp