Security readout for executives and security teams
Plain-English summary
Claude Code before 2.1.7 could ignore a user’s file-access deny rule when the blocked file was reached through a symbolic link. This could let the tool read a file the user intended to keep off-limits. The vendor advisory says the issue is patched in 2.1.7. Severity is low, but teams using AI coding tools should update promptly.
Executive priority
Treat as a low-severity but quick-fix AI tooling issue. Prioritize update across developer environments to prevent unintended sensitive file access and reinforce AI tool governance.
Technical view
This is an authorization bypass involving symlink handling in Claude Code settings.json deny enforcement. If a file was denied directly, but Claude Code could access a symlink pointing to it, deny checks could be bypassed. The CVE maps to CWE-285 and CWE-61. Affected versions are anthropics/claude-code before 2.1.7.
Likely exposure
Exposure is limited to environments running Claude Code versions earlier than 2.1.7, especially where deny rules protect sensitive files and symlinks exist within accessible paths.
Exploitation context
Sources do not report active exploitation, and the CVE is not listed as KEV. The scenario requires Claude Code access to a symlink targeting a denied file and user interaction per the CVSS vector.
Researcher notes
The public description is clear on root cause and fixed version, but does not provide broad exploitation evidence. Avoid assuming remote compromise; impact is unauthorized file read through symlink-based policy bypass.
Mitigation direction
- Upgrade Claude Code to version 2.1.7 or later.
- Review vendor advisory for any additional configuration guidance.
- Reduce Claude Code access to sensitive directories where practical.
- Review symlinks in workspaces used by Claude Code.
Validation and detection
- Inventory systems and developer environments running Claude Code.
- Confirm installed Claude Code versions are 2.1.7 or later.
- Review settings.json deny rules protecting sensitive files.
- Check whether accessible workspaces contain symlinks to denied files.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-285: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCWE-61: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-25724 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Low
- CVSS
- 2.3 (4.0)
- Known Exploited
- No
- Published
Vector: 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
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
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——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
2.3LowVector: 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
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/anthropics/claude-code/security/advisories/GHSA-4q92-rfm6-2cqxCVE reference · x_refsource_CONFIRM
- https://www.terra.security/blog/when-ai-becomes-the-attack-surface-lessons-from-discovering-cve-2026-25724CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Authorization
Improper Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
UNIX Symbolic Link (Symlink) Following
UNIX Symbolic Link (Symlink) Following represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.