Read the docs
TI-2026-27494 Aliases CVE-2026-35356GHSA-gwm6-q8ch-hcfr

uutils coreutils install Arbitrary File Overwrite with -D via Path Component Symlink Race

Priority LOW 27CWE-367Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
None · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00108 1st percentileScored 2026-11-07
Fix Fixed coreutils (Uutils): 0.7.0uu_install (crates.io): 0.7.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Uutilscoreutilsbefore 0.7.00.7.0Patch availableCNA
—uu_install (crates.io)before 0.7.00.7.0Patch availableGHSA-gwm6-q8ch-hcfr
  • coreutils VendorUutils Affected before 0.7.0 Fixed in 0.7.0 Patch available CNA
  • uu_install (crates.io) Vendor— Affected before 0.7.0 Fixed in 0.7.0 Patch available GHSA-gwm6-q8ch-hcfr

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:uutils:coreutils:*:*:*:*:*:rust:*:*before 0.7.0VulnerableUutils
  • cpe:2.3:a:uutils:coreutils:*:*:*:*:*:rust:*:* Versions before 0.7.0 Vulnerable ·Uutils

Remediation

  • Fix · CNA coreutils (Uutils) Fixed in 0.7.0
  • Fix · GHSA-gwm6-q8ch-hcfr uu_install (crates.io) Fixed in 0.7.0 Advisory →

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Uutils coreutils — github.com/uutils/coreutils/releases/tag/0.7.0

    5 records Highest priority Priority LOW 5 LOW

    Other records, highest priority first

    • TI-2026-27487 uutils coreutils Path-Based Safety Bypass with --preserve-rootPriority LOW 33
    • TI-2026-27503 uutils coreutils mv Denial of Service and Data Duplication via Improper Symlink ExpansionPriority LOW 28
    • TI-2026-27496 uutils coreutils cp Semantic Loss and Potential Denial of Service with -R via Device Node Stream ReadingPriority LOW 24
    Show all 5 records → Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-35356
  2. 2026-10-03 Alias added: GHSA-gwm6-q8ch-hcfr

References

Patch 1

Advisory 2

Other 3

  • TI-2026-27506 uutils coreutils chroot Local Privilege Escalation and chroot Escape in via Name Service Switch (NSS) Injection CVSS 3.1HIGH 7.2
  • TI-2026-27498 uutils coreutils touch Arbitrary File Truncation via TOCTOU Race Condition CVSS 3.1MEDIUM 6.3
  • TI-2026-27488 uutils coreutils cp Unexpected Privileged Executable Creation with -p CVSS 3.1MEDIUM 6.6
  • TI-2026-27502 uutils coreutils mv Arbitrary File Overwrite via Cross-Device TOCTOU Race Condition CVSS 3.1MEDIUM 6.3
  • TI-2026-27493 uutils coreutils install Arbitrary File Overwrite via Symlink TOCTOU Race CVSS 3.1MEDIUM 6.3
  • TI-2026-27511 uutils coreutils ln Local Denial of Service via Improper Handling of Non-UTF-8 Filenames CVSS 3.1MEDIUM 5.5
See all 43 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences