Uutils coreutils up to 0.5.x Environment Variable /tmp TMPDIR temp file

CVSS Meta Temp Score
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CTI Interest Score
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3.2$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in Uutils coreutils up to 0.5.x. This affects an unknown function of the file /tmp of the component Environment Variable Handler. Such manipulation of the argument TMPDIR leads to temp file. This vulnerability is uniquely identified as CVE-2026-35342. Local access is required to approach this attack. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Uutils coreutils up to 0.5.x. It has been rated as problematic. Affected by this issue is an unknown functionality of the file /tmp of the component Environment Variable Handler. The manipulation of the argument TMPDIR with an unknown input leads to a temp file vulnerability. Using CWE to declare the problem leads to CWE-377. Creating and using insecure temporary files can leave application and system data vulnerable to attack. Impacted is confidentiality. CVE summarizes:

The mktemp utility in uutils coreutils fails to properly handle an empty TMPDIR environment variable. Unlike GNU mktemp, which falls back to /tmp when TMPDIR is an empty string, the uutils implementation treats the empty string as a valid path. This causes temporary files to be created in the current working directory (CWD) instead of the intended secure temporary directory. If the CWD is more permissive or accessible to other users than /tmp, it may lead to unintended information disclosure or unauthorized access to temporary data.

The weakness was disclosed by Zellic. The advisory is available at github.com. This vulnerability is handled as CVE-2026-35342 since 04/02/2026. The exploitation is known to be easy. Local access is required to approach this attack. Technical details are known, but there is no available exploit.

Upgrading to version 0.6.0 eliminates this vulnerability.

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Productinfo

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.3
VulDB Meta Temp Score: 3.2

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 3.3
CNA Vector (canonical): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Temp file
CWE: CWE-377
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: coreutils 0.6.0

Timelineinfo

04/02/2026 CVE reserved
04/22/2026 +20 days Advisory disclosed
04/22/2026 +0 days VulDB entry created
04/22/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Researcher: Zellic
Status: Confirmed

CVE: CVE-2026-35342 (🔒)
GCVE (CVE): GCVE-0-2026-35342
GCVE (VulDB): GCVE-100-358982

Entryinfo

Created: 04/22/2026 18:40
Changes: 04/22/2026 18:40 (66)
Complete: 🔍
Cache ID: 216::103

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