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-2026-22820 (GCVE-0-2026-22820)
Vulnerability from cvelistv5 – Published: 2026-01-14 15:06 – Updated: 2026-01-14 15:19
VLAI
Title
Outray cli is vulnerable to race conditions in tunnels creation
Summary
Outray openSource ngrok alternative. Prior to 0.1.5, a TOCTOU race condition vulnerability allows a user to exceed the set number of active tunnels in their subscription plan. This vulnerability is fixed in 0.1.5.
Severity
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/outray-tunnel/outray/security/… | x_refsource_CONFIRM |
| https://github.com/outray-tunnel/outray/commit/08… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| akinloluwami | outray |
Affected:
< 0.1.5
|
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CVE-2026-2364 (GCVE-0-2026-2364)
Vulnerability from cvelistv5 – Published: 2026-03-10 07:22 – Updated: 2026-03-10 16:51
VLAI
Title
CODESYS Installer TOCTOU Privilege Escalation
Summary
If a legitimate user confirms a self-update prompt or initiate an installation of a CODESYS Development System, a low privileged local attacker can gain elevated rights due to a TOCTOU vulnerability in the CODESYS installer.
Severity
7.3 (High)
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| CODESYS | CODESYS Installer |
Affected:
0.0.0 , < 2.6.1.0
(semver)
|
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CVE-2026-23950 (GCVE-0-2026-23950)
Vulnerability from cvelistv5 – Published: 2026-01-20 00:40 – Updated: 2026-01-21 20:15
VLAI
Title
node-tar has Race Condition in Path Reservations via Unicode Ligature Collisions on macOS APFS
Summary
node-tar,a Tar for Node.js, has a race condition vulnerability in versions up to and including 7.5.3. This is due to an incomplete handling of Unicode path collisions in the `path-reservations` system. On case-insensitive or normalization-insensitive filesystems (such as macOS APFS, In which it has been tested), the library fails to lock colliding paths (e.g., `ß` and `ss`), allowing them to be processed in parallel. This bypasses the library's internal concurrency safeguards and permits Symlink Poisoning attacks via race conditions. The library uses a `PathReservations` system to ensure that metadata checks and file operations for the same path are serialized. This prevents race conditions where one entry might clobber another concurrently. This is a Race Condition which enables Arbitrary File Overwrite. This vulnerability affects users and systems using node-tar on macOS (APFS/HFS+). Because of using `NFD` Unicode normalization (in which `ß` and `ss` are different), conflicting paths do not have their order properly preserved under filesystems that ignore Unicode normalization (e.g., APFS (in which `ß` causes an inode collision with `ss`)). This enables an attacker to circumvent internal parallelization locks (`PathReservations`) using conflicting filenames within a malicious tar archive. The patch in version 7.5.4 updates `path-reservations.js` to use a normalization form that matches the target filesystem's behavior (e.g., `NFKD`), followed by first `toLocaleLowerCase('en')` and then `toLocaleUpperCase('en')`. As a workaround, users who cannot upgrade promptly, and who are programmatically using `node-tar` to extract arbitrary tarball data should filter out all `SymbolicLink` entries (as npm does) to defend against arbitrary file writes via this file system entry name collision issue.
Severity
8.8 (High)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/isaacs/node-tar/security/advis… | x_refsource_CONFIRM |
| https://github.com/isaacs/node-tar/commit/3b1abfa… | x_refsource_MISC |
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CVE-2026-23988 (GCVE-0-2026-23988)
Vulnerability from cvelistv5 – Published: 2026-01-22 21:52 – Updated: 2026-01-23 20:13
VLAI
Title
Rufus has Local Privilege Escalation via TOCTOU Race Condition in Fido Script Handling
Summary
Rufus is a utility that helps format and create bootable USB flash drives. Versions 4.11 and below contain a race condition (TOCTOU) in src/net.c during the creation, validation, and execution of the Fido PowerShell script. Since Rufus runs with elevated privileges (Administrator) but writes the script to the %TEMP% directory (writeable by standard users) without locking the file, a local attacker can replace the legitimate script with a malicious one between the file write operation and the execution step. This allows arbitrary code execution with Administrator privileges. This issue has been fixed in version 4.12_BETA.
Severity
7.3 (High)
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/pbatard/rufus/security/advisor… | x_refsource_CONFIRM |
| https://github.com/pbatard/rufus/commit/460cc5768… | x_refsource_MISC |
| https://github.com/pbatard/rufus/releases/tag/v4.… | x_refsource_MISC |
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CVE-2026-24071 (GCVE-0-2026-24071)
Vulnerability from cvelistv5 – Published: 2026-02-02 13:23 – Updated: 2026-02-03 14:42
VLAI
Title
XPC Client Validation via PID leading to Local Privilege Escalation in Native Instruments Native Access
Summary
It was found that the XPC service offered by the privileged helper of Native Access uses the PID of the connecting client to verify its code signature. This is considered insecure and can be exploited by PID reuse attacks. The connection handler function uses _xpc_connection_get_pid(arg2) as argument for the hasValidSignature function. This value can not be trusted since it is vulnerable to PID reuse attacks.
Severity
7.8 (High)
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://sec-consult.com/vulnerability-lab/advisor… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Native Instruments | Native Access |
Affected:
verified up to 3.22.0
|
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CVE-2026-24191 (GCVE-0-2026-24191)
Vulnerability from cvelistv5 – Published: 2026-05-26 17:23 – Updated: 2026-05-27 15:40
VLAI
Summary
NVIDIA Display Driver for Windows contains a vulnerability where an attacker could cause a time-of-check time-of-use issue. A successful exploit of this vulnerability might lead to denial of service, escalation of privileges, information disclosure, data tampering, and code execution.
Severity
7.8 (High)
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
Impacted products
13 products
| Vendor | Product | Version | |
|---|---|---|---|
| NVIDIA | GeForce |
Affected:
All driver versions prior to 596.36
|
|
| NVIDIA | GeForce |
Affected:
All driver versions prior to 582.53 Only GPUs based on the NVIDIA Maxwell, Volta, and Pascal GPU architectures are affected.
|
|
| NVIDIA | NVIDIA RTX, Quadro, NVS |
Affected:
All driver versions prior to 596.36
|
|
| NVIDIA | NVIDIA RTX, Quadro, NVS |
Affected:
All driver versions prior to 582.53
|
|
| NVIDIA | NVIDIA RTX, Quadro, NVS |
Affected:
All driver versions prior to 539.72
|
|
| NVIDIA | Tesla |
Affected:
All driver versions prior to 596.36
|
|
| NVIDIA | Tesla |
Affected:
All driver versions prior to 582.53
|
|
| NVIDIA | Tesla |
Affected:
All driver versions prior to 539.72
|
|
| NVIDIA | Guest driver |
Affected:
595.97(All versions prior to and including vGPU 20.0)
|
|
| NVIDIA | Guest driver |
Affected:
582.16(All versions prior to and including vGPU 19.4)
|
|
| NVIDIA | Guest driver |
Affected:
539.64(All versions prior to and including vGPU 16.13)
|
|
| NVIDIA | Virtual GPU Manager |
Affected:
595.94(All versions prior to and including vGPU 20.0)
|
|
| NVIDIA | Virtual GPU Manager |
Affected:
582.16(All versions prior to and including vGPU 19.4)
|
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CVE-2026-25052 (GCVE-0-2026-25052)
Vulnerability from cvelistv5 – Published: 2026-02-04 16:47 – Updated: 2026-02-05 14:36
VLAI
Title
n8n Improper File Access Controls Allow Arbitrary File Read by Authenticated Users
Summary
n8n is an open source workflow automation platform. Prior to versions 1.123.18 and 2.5.0, a vulnerability in the file access controls allows authenticated users with permission to create or modify workflows to read sensitive files from the n8n host system. This can be exploited to obtain critical configuration data and user credentials, leading to complete account takeover of any user on the instance. This issue has been patched in versions 1.123.18 and 2.5.0.
Severity
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/n8n-io/n8n/security/advisories… | x_refsource_CONFIRM |
Impacted products
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CVE-2026-25641 (GCVE-0-2026-25641)
Vulnerability from cvelistv5 – Published: 2026-02-06 19:50 – Updated: 2026-02-06 20:20
VLAI
Title
SandboxJS has a sandbox escape via TOCTOU bug on keys in property accesses
Summary
SandboxJS is a JavaScript sandboxing library. Prior to 0.8.29, there is a sandbox escape vulnerability due to a mismatch between the key on which the validation is performed and the key used for accessing properties. Even though the key used in property accesses is annotated as string, this is never enforced. So, attackers can pass malicious objects that coerce to different string values when used, e.g., one for the time the key is sanitized using hasOwnProperty(key) and a different one for when the key is used for the actual property access. This vulnerability is fixed in 0.8.29.
Severity
10 (Critical)
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/nyariv/SandboxJS/security/advi… | x_refsource_CONFIRM |
| https://github.com/nyariv/SandboxJS/commit/67cb18… | x_refsource_MISC |
| https://github.com/nyariv/SandboxJS/blob/6103d714… | x_refsource_MISC |
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CVE-2026-25704 (GCVE-0-2026-25704)
Vulnerability from cvelistv5 – Published: 2026-03-30 07:44 – Updated: 2026-04-16 16:32
VLAI
Title
Incomplete privilege drop for com.system76.CosmicGreeter.GetUserData
Summary
A Privilege Dropping / Lowering Errors/Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in cosmic-greeter can allow an attacker to regain privileges that should have been dropped and abuse them in the racy checking logic.
This issue affects cosmic-greeter before https://github.Com/pop-os/cosmic-greeter/pull/426.
Severity
CWE
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| pop-os | cosmic-greeter |
Affected:
? , < https://github.com/pop-os/cosmic-greeter/pull/426
(git)
|
Date Public
2026-03-11 11:25
Credits
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CVE-2026-25728 (GCVE-0-2026-25728)
Vulnerability from cvelistv5 – Published: 2026-02-10 17:12 – Updated: 2026-02-11 15:30
VLAI
Title
ClipBucket v5 Affected by Remote Code Execution via Avatar/Background File Upload Race Condition
Summary
ClipBucket v5 is an open source video sharing platform. Prior to 5.5.3 - #40, a Time-of-Check to Time-of-Use (TOCTOU) race condition vulnerability exists in ClipBucket's avatar and background image upload functionality. The application moves uploaded files to a web-accessible location before validating them, creating a window where an attacker can execute arbitrary PHP code before the file is deleted. The uploaded file was moved to a web-accessible path via move_uploaded_file(), then validated via ValidateImage(). If validation failed, the file was deleted via @unlink(). This vulnerability is fixed in 5.5.3 - #40.
Severity
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/MacWarrior/clipbucket-v5/secur… | x_refsource_CONFIRM |
| https://github.com/MacWarrior/clipbucket-v5/commi… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MacWarrior | clipbucket-v5 |
Affected:
< 5.5.3 - #40
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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.