CVE-2026-35356
uutils coreutils install Arbitrary File Overwrite with -D via Path Component Symlink Race
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.
INFO
Published Date :
April 22, 2026, 5:16 p.m.
Last Modified :
April 27, 2026, 12:27 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | cc1ad9ee-3454-478d-9317-d3e869d708bc | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update uutils coreutils to a patched version.
- Avoid using the -D flag with install utility.
- Ensure file operations are properly synchronized.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-35356.
| URL | Resource |
|---|---|
| https://github.com/uutils/coreutils/pull/10140 | Issue Tracking Patch |
| https://github.com/uutils/coreutils/releases/tag/0.7.0 | Release Notes |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-35356 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-35356
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-35356 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-35356 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Apr. 27, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:uutils:coreutils:*:*:*:*:*:rust:*:* versions up to (excluding) 0.7.0 Added Reference Type Canonical Ltd.: https://github.com/uutils/coreutils/pull/10140 Types: Issue Tracking, Patch Added Reference Type Canonical Ltd.: https://github.com/uutils/coreutils/releases/tag/0.7.0 Types: Release Notes -
New CVE Received by [email protected]
Apr. 22, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H Added CWE CWE-367 Added Reference https://github.com/uutils/coreutils/pull/10140 Added Reference https://github.com/uutils/coreutils/releases/tag/0.7.0