TI-2026-27479 Aliases CVE-2026-35341 GHSA-pmf6-rcx4-v53v

uutils coreutils mkfifo Unauthorized Permission Change on Existing Files

LOW 32CWE-732Published 2026-04-22 · Updated 2026-04-24

Key facts

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

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

Summary

A vulnerability in uutils coreutils mkfifo allows for the unauthorized modification of permissions on existing files. When mkfifo fails to create a FIFO because a file already exists at the target path, it fails to terminate the operation for that path and continues to execute a follow-up set_permissions call. This results in the existing file's permissions being changed to the default mode (often 644 after umask), potentially exposing sensitive files such as SSH private keys to other users on the system.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00165 5th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed uu_mkfifo (crates.io): 0.6.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Uutils	coreutils	—	—	No fix listed	CNA
—	uu_mkfifo (crates.io)	before 0.6.0	0.6.0	Patch available	GHSA-pmf6-rcx4-v53v

coreutils VendorUutils Affected — Fixed in — No fix listed CNA
uu_mkfifo (crates.io) Vendor— Affected before 0.6.0 Fixed in 0.6.0 Patch available GHSA-pmf6-rcx4-v53v

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:uutils:coreutils:-:::::rust::	not specified by NVD	Vulnerable	Uutils

cpe:2.3:a:uutils:coreutils:-:*:*:*:*:rust:*:* Versions not specified by NVD Vulnerable ·Uutils

Remediation

Fix · GHSA-pmf6-rcx4-v53v uu_mkfifo (crates.io) Fixed in 0.6.0 Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2026-35341
2026-10-03 Alias added: GHSA-pmf6-rcx4-v53v

References

Exploit 1

https://github.com/uutils/coreutils/issues/10020

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-35341

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