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Vulnerability Details :

CVE-2026-35341

Summary
Assigner-canonical
Assigner Org ID-cc1ad9ee-3454-478d-9317-d3e869d708bc
Published At-22 Apr, 2026 | 16:07
Updated At-24 Apr, 2026 | 13:43
Rejected At-
Credits

uutils coreutils mkfifo Unauthorized Permission Change on Existing Files

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.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
â–¼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:canonical
Assigner Org ID:cc1ad9ee-3454-478d-9317-d3e869d708bc
Published At:22 Apr, 2026 | 16:07
Updated At:24 Apr, 2026 | 13:43
Rejected At:
â–¼CVE Numbering Authority (CNA)
uutils coreutils mkfifo Unauthorized Permission Change on Existing Files

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.

Affected Products
Vendor
Uutils
Product
coreutils
Collection URL
https://github.com/uutils
Package Name
coreutils
Repo
https://github.com/uutils/coreutils
Platforms
  • Linux
  • Unix
  • macOS
Default Status
affected
Problem Types
TypeCWE IDDescription
CWECWE-732CWE-732: Incorrect Permission Assignment for Critical Resource
Type: CWE
CWE ID: CWE-732
Description: CWE-732: Incorrect Permission Assignment for Critical Resource
Metrics
VersionBase scoreBase severityVector
3.17.1HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Version: 3.1
Base score: 7.1
Base severity: HIGH
Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
CAPEC-180CAPEC-180: Exploiting Incorrectly Configured Access Control Security Levels
CAPEC ID: CAPEC-180
Description: CAPEC-180: Exploiting Incorrectly Configured Access Control Security Levels
Solutions

Configurations

Workarounds

Exploits

Credits

finder
Zellic
Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/uutils/coreutils/issues/10020
issue-tracking
Hyperlink: https://github.com/uutils/coreutils/issues/10020
Resource:
issue-tracking
â–¼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
Information is not available yet
â–¼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security@ubuntu.com
Published At:22 Apr, 2026 | 17:16
Updated At:24 Apr, 2026 | 19:05

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.17.1HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Type: Secondary
Version: 3.1
Base score: 7.1
Base severity: HIGH
Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CPE Matches

uutils
uutils
>>coreutils>>-
cpe:2.3:a:uutils:coreutils:-:*:*:*:*:rust:*:*
Weaknesses
CWE IDTypeSource
CWE-732Secondarysecurity@ubuntu.com
CWE ID: CWE-732
Type: Secondary
Source: security@ubuntu.com
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://github.com/uutils/coreutils/issues/10020security@ubuntu.com
Exploit
Issue Tracking
Vendor Advisory
Hyperlink: https://github.com/uutils/coreutils/issues/10020
Source: security@ubuntu.com
Resource:
Exploit
Issue Tracking
Vendor Advisory

Change History

0
Information is not available yet

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Details not found