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-2026-25738 (GCVE-0-2026-25738)
Vulnerability from cvelistv5 – Published: 2026-02-19 15:30 – Updated: 2026-02-19 17:34
VLAI
Title
Indico has Server-Side Request Forgery (SSRF) in multiple places
Summary
Indico is an event management system that uses Flask-Multipass, a multi-backend authentication system for Flask. Versions prior to 3.3.10 are vulnerable to server-side request forgery. Indico makes outgoing requests to user-provides URLs in various places. This is mostly intentional and part of Indico's functionality but is never intended to let users access "special" targets such as localhost or cloud metadata endpoints. Users should upgrade to version 3.3.10 to receive a patch. Those who do not have IPs that expose sensitive data without authentication (typically because they do not host Indico on AWS) are not affected. Only event organizers can access endpoints where SSRF could be used to actually see the data returned by such a request. For those who trust their event organizers, the risk is also very limited. For additional security, both before and after patching, one may also use the common proxy-related environment variables (in particular `http_proxy` and `https_proxy`) to force outgoing requests to go through a proxy that limits requests in whatever way you deem useful/necessary. These environment variables would need to be set both on the indico-uwsgi and indico-celery services.
Severity
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/indico/indico/security/advisor… | x_refsource_CONFIRM |
| https://github.com/indico/indico/commit/70d341826… | x_refsource_MISC |
| https://github.com/indico/indico/releases/tag/v3.3.10 | x_refsource_MISC |
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CVE-2026-26017 (GCVE-0-2026-26017)
Vulnerability from cvelistv5 – Published: 2026-03-06 15:36 – Updated: 2026-03-06 16:06
VLAI
Title
CoreDNS ACL Bypass
Summary
CoreDNS is a DNS server that chains plugins. Prior to version 1.14.2, a logical vulnerability in CoreDNS allows DNS access controls to be bypassed due to the default execution order of plugins. Security plugins such as acl are evaluated before the rewrite plugin, resulting in a Time-of-Check Time-of-Use (TOCTOU) flaw. This issue has been patched in version 1.14.2.
Severity
7.7 (High)
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/coredns/coredns/security/advis… | x_refsource_CONFIRM |
| https://github.com/coredns/coredns/releases/tag/v1.14.2 | x_refsource_MISC |
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CVE-2026-26206 (GCVE-0-2026-26206)
Vulnerability from cvelistv5 – Published: 2026-04-29 17:49 – Updated: 2026-04-29 18:51
VLAI
Title
Wazuh: API brute-force protection bypass via race condition in login attempt tracking
Summary
Wazuh is a free and open source platform used for threat prevention, detection, and response. From version 4.0.0 to before version 4.14.4, Wazuh's server API brute-force protection for POST /security/user/authenticate can be bypassed by sending concurrent authentication requests. Although the configured threshold (max_login_attempts, default 50) is enforced correctly for sequential requests, a parallel burst allows significantly more failed login attempts to be processed before the IP block is applied. This enables an attacker to perform more password guesses than the configured policy intends (e.g., 100 attempts processed where 50 should be allowed). This issue has been patched in version 4.14.4.
Severity
6.5 (Medium)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/wazuh/wazuh/security/advisorie… | x_refsource_CONFIRM |
| https://github.com/wazuh/wazuh/releases/tag/v4.14.4 | x_refsource_MISC |
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CVE-2026-26224 (GCVE-0-2026-26224)
Vulnerability from cvelistv5 – Published: 2026-02-12 21:58 – Updated: 2026-05-14 02:09
VLAI
Title
Intego Log Reporter TOCTOU Local Privilege Escalation
Summary
Intego Log Reporter, a macOS diagnostic utility bundled with Intego security products that collects system and application logs for support analysis, contains a local privilege escalation vulnerability. A root-executed diagnostic script creates and writes files in /tmp without enforcing secure directory handling, introducing a time-of-check to time-of-use (TOCTOU) race condition. A local unprivileged user can exploit a symlink-based race condition to cause arbitrary file writes to privileged system locations, resulting in privilege escalation to root.
Severity
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://blog.quarkslab.com/intego_lpe_macos_1.html | technical-descriptionexploit |
| https://www.intego.com/ | product |
| https://blog.quarkslab.com/resources/2026-02-10_i… | product |
| https://www.vulncheck.com/advisories/intego-log-r… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Intego | Log Reporter |
Affected:
0 , ≤ 10.9.*
(custom)
|
Credits
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CVE-2026-27127 (GCVE-0-2026-27127)
Vulnerability from cvelistv5 – Published: 2026-02-24 02:39 – Updated: 2026-02-28 02:12
VLAI
Title
Craft CMS has Cloud Metadata SSRF Protection Bypass via DNS Rebinding
Summary
Craft is a content management system (CMS). In versions 4.5.0-RC1 through 4.16.18 and 5.0.0-RC1 through 5.8.22, the SSRF validation in Craft CMS’s GraphQL Asset mutation performs DNS resolution separately from the HTTP request. This Time-of-Check-Time-of-Use (TOCTOU) vulnerability enables DNS rebinding attacks, where an attacker’s DNS server returns different IP addresses for validation compared to the actual request. This is a bypass of the security fix for CVE-2025-68437 that allows access to all blocked IPs, not just IPv6 endpoints. Exploitation requires GraphQL schema permissions for editing assets in the `<VolumeName>` volume and creating assets in the `<VolumeName>` volume. These permissions may be granted to authenticated users with appropriate GraphQL schema access and/or Public Schema (if misconfigured with write permissions). Versions 4.16.19 and 5.8.23 patch the issue.
Severity
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/craftcms/cms/security/advisori… | x_refsource_CONFIRM |
| https://github.com/craftcms/cms/security/advisori… | x_refsource_MISC |
| https://github.com/craftcms/cms/commit/a4cf3fb63b… | x_refsource_MISC |
Impacted products
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CVE-2026-27128 (GCVE-0-2026-27128)
Vulnerability from cvelistv5 – Published: 2026-02-24 02:42 – Updated: 2026-02-28 02:13
VLAI
Title
Craft CMS's race condition in Token Service potentially allows for token usage greater than the token limit
Summary
Craft is a content management system (CMS). In versions 4.5.0-RC1 through 4.16.18 and 5.0.0-RC1 through 5.8.22, a Time-of-Check-Time-of-Use (TOCTOU) race condition exists in Craft CMS’s token validation service for tokens that explicitly set a limited usage. The `getTokenRoute()` method reads a token’s usage count, checks if it’s within limits, then updates the database in separate non-atomic operations. By sending concurrent requests, an attacker can use a single-use impersonation token multiple times before the database update completes. To make this work, an attacker needs to obtain a valid user account impersonation URL with a non-expired token via some other means and exploit a race condition while bypassing any rate-limiting rules in place. For this to be a privilege escalation, the impersonation URL must include a token for a user account with more permissions than the current user. Versions 4.16.19 and 5.8.23 patch the issue.
Severity
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/craftcms/cms/security/advisori… | x_refsource_CONFIRM |
| https://github.com/craftcms/cms/commit/3e4afe1827… | x_refsource_MISC |
Impacted products
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CVE-2026-27189 (GCVE-0-2026-27189)
Vulnerability from cvelistv5 – Published: 2026-02-21 00:01 – Updated: 2026-02-25 21:25
VLAI
Title
OpenSift: Race-prone local persistence could cause state corruption/loss
Summary
OpenSift is an AI study tool that sifts through large datasets using semantic search and generative AI. Versions 1.1.2-alpha and below, use non-atomic and insufficiently synchronized local JSON persistence flows, potentially causing concurrent operations to lose updates or corrupt local state across sessions/study/quiz/flashcard/wellness/auth stores. This issue has been fixed in version 1.1.3-alpha.
Severity
6.6 (Medium)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/OpenSift/OpenSift/security/adv… | x_refsource_CONFIRM |
| https://github.com/OpenSift/OpenSift/releases/tag… | x_refsource_MISC |
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CVE-2026-27456 (GCVE-0-2026-27456)
Vulnerability from cvelistv5 – Published: 2026-04-03 21:23 – Updated: 2026-04-06 15:42
VLAI
Title
util-linux: TOCTOU Race Condition in util-linux mount(8) - Loop Device Setup
Summary
util-linux is a random collection of Linux utilities. Prior to version 2.41.4, a TOCTOU (Time-of-Check-Time-of-Use) vulnerability has been identified in the SUID binary /usr/bin/mount from util-linux. The mount binary, when setting up loop devices, validates the source file path with user privileges via fork() + setuid() + realpath(), but subsequently re-canonicalizes and opens it with root privileges (euid=0) without verifying that the path has not been replaced between both operations. Neither O_NOFOLLOW, nor inode comparison, nor post-open fstat() are employed. This allows a local unprivileged user to replace the source file with a symlink pointing to any root-owned file or device during the race window, causing the SUID binary to open and mount it as root. Exploitation requires an /etc/fstab entry with user,loop options whose path points to a directory where the attacker has write permission, and that /usr/bin/mount has the SUID bit set (the default configuration on virtually all Linux distributions). The impact is unauthorized read access to root-protected files and block devices, including backup images, disk volumes, and any file containing a valid filesystem. This issue has been patched in version 2.41.4.
Severity
4.7 (Medium)
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/util-linux/util-linux/security… | x_refsource_CONFIRM |
| https://github.com/util-linux/util-linux/commit/5… | x_refsource_MISC |
| https://github.com/util-linux/util-linux/releases… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| util-linux | util-linux |
Affected:
< 2.41.4
|
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CVE-2026-27545 (GCVE-0-2026-27545)
Vulnerability from cvelistv5 – Published: 2026-03-18 01:34 – Updated: 2026-03-18 14:02 X_Open Source
VLAI
Title
OpenClaw < 2026.2.26 - Approval Bypass via Parent Symlink Current Working Directory Rebind
Summary
OpenClaw versions prior to 2026.2.26 contain an approval bypass vulnerability in system.run execution that allows attackers to execute commands from unintended filesystem locations by rebinding writable parent symlinks in the current working directory after approval. An attacker can modify mutable parent symlink path components between approval and execution time to redirect command execution to a different location while preserving the visible working directory string.
Severity
6.1 (Medium)
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
7 references
Impacted products
Date Public
2026-02-26 00:00
Credits
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CVE-2026-27670 (GCVE-0-2026-27670)
Vulnerability from cvelistv5 – Published: 2026-03-19 01:00 – Updated: 2026-03-19 13:45 X_Open Source
VLAI
Title
OpenClaw < 2026.3.2 - Arbitrary File Write via ZIP Extraction Parent Symlink Race Condition
Summary
OpenClaw versions prior to 2026.3.2 contain a race condition vulnerability in ZIP extraction that allows local attackers to write files outside the intended destination directory. Attackers can exploit a time-of-check-time-of-use race between path validation and file write operations by rebinding parent directory symlinks to redirect writes outside the extraction root.
Severity
5.3 (Medium)
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
3 references
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| https://github.com/openclaw/openclaw/commit/7dac9… | patch |
| https://www.vulncheck.com/advisories/openclaw-arb… | third-party-advisory |
Impacted products
Date Public
2026-03-03 00:00
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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.