CWE-367

Time-of-check Time-of-use (TOCTOU) Race Condition

The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check.

CVE-2026-35360 (GCVE-0-2026-35360)

Vulnerability from cvelistv5 – Published: 2026-04-22 16:08 – Updated: 2026-04-22 18:03
VLAI
Title
uutils coreutils touch Arbitrary File Truncation via TOCTOU Race Condition
Summary
The touch utility in uutils coreutils is vulnerable to a Time-of-Check to Time-of-Use (TOCTOU) race condition during file creation. When the utility identifies a missing path, it later attempts creation using File::create(), which internally uses O_TRUNC. An attacker can exploit this window to create a file or swap a symlink at the target path, causing touch to truncate an existing file and leading to permanent data loss.
Severity
6.3 (Medium)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
CWE
  • CWE-367 - Time-of-Check Time-of-Use (TOCTOU) Race Condition
Assigner
References
Impacted products
Credits
Zellic
Show details on NVD website
To clipboard 

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CVE-2026-35362 (GCVE-0-2026-35362)

Vulnerability from cvelistv5 – Published: 2026-04-22 16:08 – Updated: 2026-04-22 17:28
VLAI
Title
uutils coreutils Missing TOCTOU Protection on Non-Linux Unix Platforms in Safe Traversal Module
Summary
The safe_traversal module in uutils coreutils, which provides protection against Time-of-Check to Time-of-Use (TOCTOU) symlink races using file-descriptor-relative syscalls, is incorrectly limited to Linux targets. On other Unix-like systems such as macOS and FreeBSD, the utility fails to utilize these protections, leaving directory traversal operations vulnerable to symlink race conditions.
Severity
3.6 (Low)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
CWE
  • CWE-367 - Time-of-Check Time-of-Use (TOCTOU) Race Condition
Assigner
References
Impacted products
Vendor Product Version
Uutils coreutils Affected: 0 , < 0.6.0 (semver)
Create a notification for this product.
Credits
Zellic
Show details on NVD website
To clipboard 

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CVE-2026-35364 (GCVE-0-2026-35364)

Vulnerability from cvelistv5 – Published: 2026-04-22 16:08 – Updated: 2026-04-22 17:22
VLAI
Title
uutils coreutils mv Arbitrary File Overwrite via Cross-Device TOCTOU Race Condition
Summary
A Time-of-Check to Time-of-Use (TOCTOU) race condition exists in the mv utility of uutils coreutils during cross-device operations. The utility removes the destination path before recreating it through a copy operation. A local attacker with write access to the destination directory can exploit this window to replace the destination with a symbolic link. The subsequent privileged move operation will follow the symlink, allowing the attacker to redirect the write and overwrite an arbitrary target file with contents from the source.
Severity
6.3 (Medium)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
CWE
  • CWE-367 - Time-of-Check Time-of-Use (TOCTOU) Race Condition
Assigner
References
Impacted products
Credits
Zellic
Show details on NVD website
To clipboard 

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CVE-2026-35374 (GCVE-0-2026-35374)

Vulnerability from cvelistv5 – Published: 2026-04-22 16:09 – Updated: 2026-04-22 17:19
VLAI
Title
uutils coreutils split Arbitrary File Truncation via Time-of-Check to Time-of-Use (TOCTOU) Race Condition
Summary
A Time-of-Check to Time-of-Use (TOCTOU) vulnerability exists in the split utility of uutils coreutils. The program attempts to prevent data loss by checking for identity between input and output files using their file paths before initiating the split operation. However, the utility subsequently opens the output file with truncation after this path-based validation is complete. A local attacker with write access to the directory can exploit this race window by manipulating mutable path components (e.g., swapping a path with a symbolic link). This can cause split to truncate and write to an unintended target file, potentially including the input file itself or other sensitive files accessible to the process, leading to permanent data loss.
Severity
6.3 (Medium)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
CWE
  • CWE-367 - Time-of-Check Time-of-Use (TOCTOU) Race Condition
Assigner
References
URL Tags
https://github.com/uutils/coreutils/pull/11401 issue-trackingpatch
Impacted products
Credits
Zellic
Show details on NVD website
To clipboard 

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CVE-2026-35376 (GCVE-0-2026-35376)

Vulnerability from cvelistv5 – Published: 2026-04-22 16:09 – Updated: 2026-04-22 17:14
VLAI
Title
uutils coreutils chcon Security Bypass and Mandatory Access Control (MAC) Inconsistency via TOCTOU Race Condition
Summary
A Time-of-Check to Time-of-Use (TOCTOU) vulnerability exists in the chcon utility of uutils coreutils during recursive operations. The implementation resolves recursive targets using a fresh path lookup (via fts_accpath) rather than binding the traversal and label application to the specific directory state encountered during traversal. Because these operations are not anchored to file descriptors, a local attacker with write access to a directory tree can exploit timing-sensitive rename or symbolic link races to redirect a privileged recursive relabeling operation to unintended files or directories. This vulnerability breaks the hardening expectations for SELinux administration workflows and can lead to the unauthorized modification of security labels on sensitive system objects.
Severity
4.5 (Medium)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
CWE
  • CWE-367 - Time-of-Check Time-of-Use (TOCTOU) Race Condition
Assigner
References
Impacted products
Vendor Product Version
Uutils coreutils Affected: 0 , < 0.8.0 (semver)
Create a notification for this product.
Credits
Zellic
Show details on NVD website
To clipboard 

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CVE-2026-35418 (GCVE-0-2026-35418)

Vulnerability from cvelistv5 – Published: 2026-05-12 16:58 – Updated: 2026-05-26 16:56
VLAI
Title
Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability
Summary
Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CWE
  • CWE-416 - Use After Free
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8755 (custom)
Create a notification for this product.
Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.7291 (custom)
Create a notification for this product.
Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.7291 (custom)
Create a notification for this product.
Microsoft Windows 11 version 22H3 Affected: 10.0.22631.0 , < 10.0.22631.7079 (custom)
Create a notification for this product.
Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.7079 (custom)
Create a notification for this product.
Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.8457 (custom)
Create a notification for this product.
Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.8457 (custom)
Create a notification for this product.
Microsoft Windows 11 version 26H1 Affected: 10.0.28000.0 , < 10.0.28000.2113 (custom)
Create a notification for this product.
Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8755 (custom)
Create a notification for this product.
Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8755 (custom)
Create a notification for this product.
Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.5139 (custom)
Create a notification for this product.
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.2330 (custom)
Create a notification for this product.
Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32860 (custom)
Create a notification for this product.
Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32860 (custom)
Create a notification for this product.
Date Public
2026-05-12 14:00
Show details on NVD website
To clipboard 

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CVE-2026-35648 (GCVE-0-2026-35648)

Vulnerability from cvelistv5 – Published: 2026-04-10 16:03 – Updated: 2026-04-13 17:55 X_Open Source
VLAI
Title
OpenClaw < 2026.3.22 - Policy Bypass via Unvalidated Queued Node Actions
Summary
OpenClaw before 2026.3.22 contains a policy bypass vulnerability where queued node actions are not revalidated against current command policy when delivered. Attackers can exploit stale allowlists or declarations that survive policy tightening to execute unauthorized commands.
Severity
2.3 (Low)
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
3.7 (Low)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
Impacted products
Vendor Product Version
OpenClaw OpenClaw Affected: 0 , < 2026.3.22 (semver)
Unaffected: 2026.3.22 (semver)
Create a notification for this product.
Date Public
2026-03-24 00:00
Credits
Peng Zhou (@zpbrent)
Show details on NVD website
To clipboard 

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CVE-2026-3590 (GCVE-0-2026-3590)

Vulnerability from cvelistv5 – Published: 2026-04-15 11:00 – Updated: 2026-04-15 14:00
VLAI
Title
Race Condition in Guest Magic Link Authentication Allows Token Reuse
Summary
Mattermost versions 10.11.x <= 10.11.12, 11.5.x <= 11.5.0, 11.4.x <= 11.4.2, 11.3.x <= 11.3.2 fail to enforce atomic single-use consumption of guest magic link tokens, which allows an attacker with access to a valid magic link to establish multiple independent authenticated sessions via concurrent requests.. Mattermost Advisory ID: MMSA-2026-00624
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
URL Tags
https://mattermost.com/security-updates vendor-advisory
Impacted products
Vendor Product Version
Mattermost Mattermost Affected: 10.11.0 , ≤ 10.11.12 (semver)
Affected: 11.5.0 , ≤ 11.5.0 (semver)
Affected: 11.4.0 , ≤ 11.4.2 (semver)
Affected: 11.3.0 , ≤ 11.3.2 (semver)
Unaffected: 11.6.0
Unaffected: 10.11.13
Unaffected: 11.5.1
Unaffected: 11.4.3
Unaffected: 11.3.3
Create a notification for this product.
Credits
Edgar Bellot Micó
Show details on NVD website
To clipboard 

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CVE-2026-40896 (GCVE-0-2026-40896)

Vulnerability from cvelistv5 – Published: 2026-04-20 15:12 – Updated: 2026-04-20 16:13
VLAI
Title
OpenProject has Cross-Project Meeting Agenda Item Injection via Unscoped Section Lookup
Summary
OpenProject is open-source, web-based project management software. Prior to version 17.3.0, a user with `manage_agendas` permission in any project can inject agenda items into meetings belonging to any other project on the instance — even projects they have no access to. No knowledge of the target project, meeting, or victim is required; the attacker can blindly spray items into every meeting on the instance by iterating sequential section IDs. Version 17.3.0 patches the issue.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Vendor Product Version
opf openproject Affected: < 17.3.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-41002 (GCVE-0-2026-41002)

Vulnerability from cvelistv5 – Published: 2026-05-07 03:53 – Updated: 2026-05-09 03:55
VLAI
Summary
The base directory (`spring.cloud.config.server.git.basedir`) used by the Spring Cloud Config Server to clone Git repositories to is susceptible to time-of-check-time-of-use (TOCTOU) attacks. Spring Cloud Config 3.1.x: affected from 3.1.0 through 3.1.13 (inclusive); upgrade to 3.1.14 or greater (Enterprise Support Only). Spring Cloud Config 4.1.x: affected from 4.1.0 through 4.1.9 (inclusive); upgrade to 4.1.10 or greater (Enterprise Support Only). Spring Cloud Config 4.2.x: affected from 4.2.0 through 4.2.6 (inclusive); upgrade to 4.2.7 or greater (Enterprise Support Only). Spring Cloud Config 4.3.x: affected from 4.3.0 through 4.3.2 (inclusive); upgrade to 4.3.3 or greater. Spring Cloud Config 5.0.x: affected from 5.0.0 through 5.0.2 (inclusive); upgrade to 5.0.3 or greater.
Severity
7.4 (High)
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
Impacted products
Vendor Product Version
Spring Spring Cloud Config Affected: 3.1.0 , < 3.1.14 (custom)
Affected: 4.1.0 , < 4.1.10 (custom)
Affected: 4.2.0 , < 4.2.7 (custom)
Affected: 4.3.0 , < 4.3.3 (custom)
Affected: 5.0.0 , < 5.0.3 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

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    "assignerShortName": "vmware",
    "cveId": "CVE-2026-41002",
    "datePublished": "2026-05-07T03:53:18.269Z",
    "dateReserved": "2026-04-16T02:19:12.970Z",
    "dateUpdated": "2026-05-09T03:55:58.649Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}
Mitigation

Phase: Implementation

Description:

  • The most basic advice for TOCTOU vulnerabilities is to not perform a check before the use. This does not resolve the underlying issue of the execution of a function on a resource whose state and identity cannot be assured, but it does help to limit the false sense of security given by the check.
Mitigation

Phase: Implementation

Description:

  • When the file being altered is owned by the current user and group, set the effective gid and uid to that of the current user and group when executing this statement.
Mitigation

Phase: Architecture and Design

Description:

  • Limit the interleaving of operations on files from multiple processes.
Mitigation

Phases: Implementation, Architecture and Design

Description:

  • If you cannot perform operations atomically and you must share access to the resource between multiple processes or threads, then try to limit the amount of time (CPU cycles) between the check and use of the resource. This will not fix the problem, but it could make it more difficult for an attack to succeed.
Mitigation

Phase: Implementation

Description:

  • Recheck the resource after the use call to verify that the action was taken appropriately.
Mitigation

Phase: Architecture and Design

Description:

  • Ensure that some environmental locking mechanism can be used to protect resources effectively.
Mitigation

Phase: Implementation

Description:

  • Ensure that locking occurs before the check, as opposed to afterwards, such that the resource, as checked, is the same as it is when in use.
CAPEC-27: Leveraging Race Conditions via Symbolic Links

This attack leverages the use of symbolic links (Symlinks) in order to write to sensitive files. An attacker can create a Symlink link to a target file not otherwise accessible to them. When the privileged program tries to create a temporary file with the same name as the Symlink link, it will actually write to the target file pointed to by the attackers' Symlink link. If the attacker can insert malicious content in the temporary file they will be writing to the sensitive file by using the Symlink. The race occurs because the system checks if the temporary file exists, then creates the file. The attacker would typically create the Symlink during the interval between the check and the creation of the temporary file.

CAPEC-29: Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions

This attack targets a race condition occurring between the time of check (state) for a resource and the time of use of a resource. A typical example is file access. The adversary can leverage a file access race condition by "running the race", meaning that they would modify the resource between the first time the target program accesses the file and the time the target program uses the file. During that period of time, the adversary could replace or modify the file, causing the application to behave unexpectedly.

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