Common Weakness Enumeration

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-2026-43529 (GCVE-0-2026-43529)

Vulnerability from cvelistv5 – Published: 2026-05-05 11:25 – Updated: 2026-05-05 12:18 X_Open Source
VLAI
Title
OpenClaw < 2026.4.10 - Time-of-Check-Time-of-Use (TOCTOU) Race Condition in exec Script Preflight Validator
Summary
OpenClaw before 2026.4.10 contains a time-of-check-time-of-use vulnerability in the validateScriptFileForShellBleed function that allows local attackers to bypass workspace boundary checks. An attacker with workspace write access can race-condition swap the target file between validation and preflight read, causing the validator to inspect a different file identity than the one that passed the initial boundary check.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
Impacted products
Vendor Product Version
OpenClaw OpenClaw Affected: 0 , < 2026.4.10 (semver)
Unaffected: 2026.4.10 (semver)
Create a notification for this product.
Date Public
2026-04-15 00:00
Credits
kikayli
Show details on NVD website

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CVE-2026-43582 (GCVE-0-2026-43582)

Vulnerability from cvelistv5 – Published: 2026-05-06 19:49 – Updated: 2026-05-07 12:32 X_Open Source
VLAI
Title
OpenClaw < 2026.4.10 - DNS Rebinding SSRF via Hostname Validation Bypass
Summary
OpenClaw before 2026.4.10 contains a server-side request forgery vulnerability in browser navigation policy that allows attackers to bypass hostname validation through DNS rebinding attacks. Attackers can exploit inconsistent hostname resolution between validation and actual network requests to pivot to internal resources via unallowlisted hostname URLs.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
Impacted products
Vendor Product Version
OpenClaw OpenClaw Affected: 0 , < 2026.4.10 (semver)
Unaffected: 2026.4.10 (semver)
Create a notification for this product.
Date Public
2026-04-16 00:00
Credits
dhyabi2
Show details on NVD website

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CVE-2026-43619 (GCVE-0-2026-43619)

Vulnerability from cvelistv5 – Published: 2026-05-20 00:49 – Updated: 2026-05-20 13:09
VLAI
Title
Rsync < 3.4.3 Symlink Race Condition via Path-Based Syscalls
Summary
Rsync version 3.4.2 and prior contain symlink race condition vulnerabilities in path-based system calls including chmod, lchown, utimes, rename, unlink, mkdir, symlink, mknod, link, rmdir, and lstat that allow local attackers to redirect operations to files outside the exported rsync module. Attackers with local filesystem access can exploit the timing window between path resolution and syscall execution by swapping symlinks to apply sender-supplied permissions, ownership, timestamps, or filenames to arbitrary files outside the intended module boundary on rsync daemons configured with 'use chroot = no'.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
  • CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
Impacted products
Vendor Product Version
RsyncProject rsync Affected: 0 , < 3.4.3 (semver)
Create a notification for this product.
Date Public
2026-05-19 00:00
Credits
Andrew Tridgell (@tridge)
Show details on NVD website

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CVE-2026-44112 (GCVE-0-2026-44112)

Vulnerability from cvelistv5 – Published: 2026-05-06 19:49 – Updated: 2026-05-13 16:08 X_Open Source
VLAI
Title
OpenClaw < 2026.4.22 - Symlink Swap Race Condition in OpenShell FS Bridge Writes
Summary
OpenClaw before 2026.4.22 contains a time-of-check/time-of-use race condition in OpenShell sandbox filesystem writes that allows attackers to redirect writes outside the intended mount root. Attackers can exploit symlink swaps during filesystem operations to bypass sandbox restrictions and write files outside the local mount root.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
Impacted products
Vendor Product Version
OpenClaw OpenClaw Affected: 0 , < 2026.4.22 (semver)
Unaffected: 2026.4.22 (semver)
Create a notification for this product.
Date Public
2026-04-23 00:00
Credits
vladimir tokarev (@VladimirEliTokarev)
Show details on NVD website

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CVE-2026-44113 (GCVE-0-2026-44113)

Vulnerability from cvelistv5 – Published: 2026-05-06 19:49 – Updated: 2026-05-13 16:07 X_Open Source
VLAI
Title
OpenClaw < 2026.4.22 - Time-of-Check/Time-of-Use Race Condition in OpenShell FS Bridge
Summary
OpenClaw before 2026.4.22 contains a time-of-check/time-of-use race condition in the OpenShell filesystem bridge that allows attackers to read files outside the intended mount root. Attackers can exploit symlink swaps during filesystem operations to bypass sandbox restrictions and access unauthorized file contents.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
Impacted products
Vendor Product Version
OpenClaw OpenClaw Affected: 0 , < 2026.4.22 (semver)
Unaffected: 2026.4.22 (semver)
Create a notification for this product.
Date Public
2026-04-23 00:00
Credits
vladimir tokarev (@VladimirEliTokarev)
Show details on NVD website

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CVE-2026-44694 (GCVE-0-2026-44694)

Vulnerability from cvelistv5 – Published: 2026-05-08 19:12 – Updated: 2026-05-12 02:05
VLAI
Title
n8n-MCP: Authenticated SSRF in n8n-mcp webhook and API client paths
Summary
n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. From version 2.18.7 to before version 2.50.2, there is an authenticated server-side request forgery vulnerability affecting the webhook trigger tools, the n8n API client (N8N_API_URL), and per-request URLs supplied via the x-n8n-url header in multi-tenant HTTP mode. This issue has been patched in version 2.50.2.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
Impacted products
Vendor Product Version
czlonkowski n8n-mcp Affected: >= 2.18.7, < 2.50.2
Create a notification for this product.
Show details on NVD website

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CVE-2026-45208 (GCVE-0-2026-45208)

Vulnerability from cvelistv5 – Published: 2026-05-21 13:04 – Updated: 2026-05-22 03:55
VLAI
Summary
A time-of-check time-of-use vulnerability in the Apex One/SEP agent could allow a local attacker to escalate privileges on affected installations. Please note: an attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
Impacted products
Vendor Product Version
Trend Micro, Inc. TrendAI Apex One Affected: 2019 (14.0) , < 14.0.0.17079 (semver)
    cpe:2.3:a:trendmicro:apexone_op:14.0.0.17079:*:*:*:*:*:*:*
Create a notification for this product.
Trend Micro, Inc. TrendAI Apex One as a Service Affected: SaaS , < 14.0.20731 (semver)
    cpe:2.3:a:trendmicro:apexone_saas:14.0.0.20731:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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CVE-2026-45487 (GCVE-0-2026-45487)

Vulnerability from cvelistv5 – Published: 2026-06-09 17:04 – Updated: 2026-06-23 17:44
VLAI
Title
Windows Program Compatibility Assistant Service Elevation of Privilege Vulnerability
Summary
Time-of-check time-of-use (TOCTOU) race condition in Program Compatibility Assistant Service allows an authorized attacker to elevate privileges locally.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.7417 (custom)
Create a notification for this product.
Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.7417 (custom)
Create a notification for this product.
Microsoft Windows 11 version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.7219 (custom)
Create a notification for this product.
Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.7219 (custom)
Create a notification for this product.
Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.8655 (custom)
Create a notification for this product.
Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.8655 (custom)
Create a notification for this product.
Microsoft Windows 11 version 26H1 Affected: 10.0.28000.0 , < 10.0.28000.2269 (custom)
Create a notification for this product.
Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.5256 (custom)
Create a notification for this product.
Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32995 (custom)
Create a notification for this product.
Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32995 (custom)
Create a notification for this product.
Date Public
2026-06-09 14:00
Show details on NVD website

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CVE-2026-45619 (GCVE-0-2026-45619)

Vulnerability from cvelistv5 – Published: 2026-05-29 13:11 – Updated: 2026-05-29 14:02
VLAI
Title
AVideo CVE-2026-43884 incomplete fix - `isSSRFSafeURL()` call sites still discard the `$resolvedIP` out-param at master HEAD post
Summary
WWBN AVideo is an open source video platform. In 29.0 and earlier, EpgParser.php, plugin/AI/receiveAsync.json.php, and other locations do not use the $resolvedIP out-param of isSSRFSafeURL() for DNS pinning via CURLOPT_RESOLVE, opening DNS-rebinding TOCTOU.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
Impacted products
Vendor Product Version
WWBN AVideo Affected: <= 29.0
Create a notification for this product.
Show details on NVD website

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CVE-2026-45647 (GCVE-0-2026-45647)

Vulnerability from cvelistv5 – Published: 2026-06-09 17:05 – Updated: 2026-06-23 17:44
VLAI
Title
Microsoft Defender for Endpoint for Mac Elevation of Privilege Vulnerability
Summary
Time-of-check time-of-use (toctou) race condition in Microsoft Defender for Endpoint allows an authorized attacker to elevate privileges locally.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
Impacted products
Vendor Product Version
Microsoft Microsoft Defender for Endpoint for Mac Affected: 101.0.0 , < 101.26042.0011 (custom)
Create a notification for this product.
Date Public
2026-06-09 14:00
Show details on NVD website

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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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