Weakness (CWE)
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.
How to prevent it (7 mitigations)
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Implementation
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.
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Implementation
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.
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Architecture and Design
Limit the interleaving of operations on files from multiple processes.
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Implementation, Architecture and Design
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.
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Implementation
Recheck the resource after the use call to verify that the action was taken appropriately.
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Architecture and Design
Ensure that some environmental locking mechanism can be used to protect resources effectively.
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Implementation
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.
Source: MITRE CWE-367
854 results · Feed
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Medium 4.2
Race condition in Browser in Google Chrome prior to 155.0.8059.39 allowed a remote attacker who had compromised the ren…
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High 8.8
Race condition in V8 in Google Chrome prior to 155.0.8059.39 allowed a remote attacker to execute arbitrary code inside…
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Medium 6.0
Race condition in CustomTabs in Google Chrome on on Android prior to 155.0.8059.39 allowed a local attacker to bypass w…
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Medium 4.7
Race condition in CacheStorage in Google Chrome prior to 155.0.8059.39 allowed a remote attacker who had compromised th…
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High 8.3
Race condition in Core in Google Chrome on on Mac prior to 155.0.8059.39 allowed a remote attacker who had compromised …
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Medium 5.8
BuildKit proxy CA cleanup can be disrupted by build steps
When proxy networking with CA injection is enabled, a build can modify its CA bundle before cleanup. This may cause cleanup to block, operate outside the build rootfs, or fail without failing the build.
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Medium 4.0
Docling: SSRF guard bypass in remote resource fetching (DNS rebinding / multi-record resolution; no IP validation in HTML render mode)
Docling simplifies document processing by parsing diverse formats and providing integrations with the generative AI ecosystem. From 2.91.0 until 2.132.0, validate_url_safety in docling/backend/utils/image_resource_loader.py validates a hostname with a single …
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Medium 4.0
Ghost: Server-Side Request Forgery in Bookmark Fetching
Ghost is a Node.js content management system. From 6.54.1 until 6.65.0, a validation issue allowed some functionality, such as Webmentions, to be abused by an unauthenticated user to make limited HTTP requests to hosts in the Ghost server's internal network. …
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Medium 6.6
Time-of-check Time-of-use (TOCTOU) Race Condition in Root Certificate Installation in Progress® Telerik® Fiddler® Classic
In Progress® Telerik® Fiddler® Classic for Windows, versions prior to v6.0.20262.10021, a time-of-check time-of-use (TOCTOU) race condition exists in the installation of the HTTPS interception root certificate into the Local Computer certificate store. Fiddle…
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Medium 5.3
crossplane crossplane-runtime ImageConfig client.go Get toctou
A vulnerability was detected in crossplane crossplane-runtime up to 2.2.2/2.3.2. This vulnerability affects the function Get of the file pkg/xpkg/client.go of the component ImageConfig. The manipulation results in time-of-check time-of-use. The attack may be …
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Low 3.7
LaraDashboard 1.4.0 before 1.4.8 Race Condition Bypasses Per-IP Registration Limit
LaraDashboard from 1.4.0 before 1.4.8 contains a race condition vulnerability in RegisterController::register that allows unauthenticated attackers to bypass the per-IP daily registration limit. Attackers can send many concurrent registration requests from on…
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Medium 6.7
OpenLiteSpeed before 1.9.3 Local Privilege Escalation via lsup.sh Auto-Update
OpenLiteSpeed before 1.9.3 contains a local privilege escalation vulnerability in admin/misc/lsup.sh that runs unverified update packages from a nobody-writable directory as root. Attackers controlling the nobody web process can replace the package in /usr/lo…
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High 7.8
NVIDIA Virtual GPU Manager contains a vulnerability in the GPU System Processor (GSP) tracing component where a guest V…
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High 8.0
Race condition in DevTools in Google Chrome prior to 154.0.8037.57 allowed a remote attacker leveraging social engineer…
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Medium 5.3
Race condition in Editing in Google Chrome prior to 154.0.8037.57 allowed a remote attacker leveraging social engineeri…
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High 7.3
Time-of-check Time-of-use (TOCTOU) Race Condition in TeamViewer Windows Installer Rollback Mechanism Leads to Local Privilege Escalation
TeamViewer Full Client and Host prior to version 15.82 on Windows contain a TOCTOU race condition in the installer rollback mechanism. A local low-privileged attacker can replace rollback backup files stored in a user-writable temporary directory before they …
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Medium 5.3CVE-2026-79417 Public exploit
Improper Access Control in ArgusMonitor.sys in Argotronic eGbR ArgusMonitor 7.4.02 and earlier allows local, low-privil…
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Medium 5.3
Nezha before 2.3.1 Denial of Service via Concurrent Server Delete
Nezha is a server and website monitoring tool. In versions >= 2.2.11 and < 2.3.1, the service sentinel worker (service/singleton/servicesentinel.go) contains an incomplete fix for a previously reported nil dereference denial of service (GHSA-qjpp-gffx-2wm9). …
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High 7.8
Froxlor before 2.3.12 Privilege Escalation via SSH Key Sync
Froxlor 2.3.10 and earlier contain a time-of-check time-of-use (TOCTOU) race condition in the SSH key synchronization cron (lib/Froxlor/Cron/System/SshKeys.php, SshKeys::generateFiles). The containment/symlink validation performed by FileDir::makeCorrectDir()…
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High 7.8
OpenClaw before 2026.7.1 Path Traversal via Filesystem Race
OpenClaw (npm package 'openclaw') before 2026.7.1 is vulnerable to a time-of-check time-of-use race condition in OpenShell local mirror filesystem mutation operations. The remove, mkdir, and rename operations could act on a different filesystem target after O…
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High 8.8
Foxit PDF Editor/Reader FoxitUpdater Race Condition Local Privilege Escalation Vulnerability
A vulnerability in Foxit PDF Editor/Reader’s update mechanism allows an update package to be replaced between download and high-privilege extraction due to insufficient file locking and integrity validation. This could enable local attackers to execute arbitr…
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High 7.5
MCP Atlassian: Incomplete fix for CVE-2026-27826: DNS rebinding bypasses SSRF validation (validated IP not pinned)
MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, validate_url_for_ssrf checks a hostname's resolved addresses, but Requests and urllib3 resolve the hostname again when connecting. A caller c…
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Medium 6.3
AT_SECURE programs may load attacker-controlled code via $ORIGIN
A time-of-check to time-of-use (TOCTOU) race condition in the dynamic loader (ld.so) of the GNU C Library (glibc) versions 2.14 through 2.44 allows a local attacker to escalate privileges. When expanding $ORIGIN in DT_RPATH for setuid/setgid (AT_SECURE) progr…
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High 7.1
Cloudreve: Storage-quota TOCTOU race allows quota bypass and storage-based denial of service
Cloudreve is a self-hosted file management and sharing system. Prior to 4.18.0, PrepareUpload in pkg/filemanager/fs/dbfs/upload.go checks a stale in-memory user storage value through validateUserCapacity and later applies an unconditional storage charge outsi…
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Medium 6.8
draw.io: SSRF via DNS rebinding in ProxyServlet bypasses private IP blocklist
draw.io is a configurable diagramming and whiteboarding application. Prior to version 30.2.7, deployments with ENABLE_DRAWIO_PROXY=1 are vulnerable to server-side request forgery because src/main/java/com/mxgraph/online/Utils.java performs the private-address…
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High 7.8
BleachBit: Exploit File Delete to Escalate Privilege
BleachBit cleans files to free disk space and to maintain privacy. Prior to 6.0.1, privileged Windows cleaning does not lock and validate a target's parent directory before deletion. A local unprivileged user can replace that directory with a Windows junction…
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Low 3.1
Race condition in FileSystem in Google Chrome prior to 153.0.8010.52 allowed a remote attacker who had compromised the …
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High 7.0
Omni: TOCTOU race condition allows multiple concurrent uses of a single-use SAML session token
Omni manages Kubernetes on bare metal, virtual machines, or in a cloud. Prior to 1.6.6 and from 1.7.0 until 1.7.3, SAML.getSession in internal/pkg/auth/interceptor/saml.go checks SAMLAssertion.Used and marks it used in separate state operations. Concurrent re…
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Medium 5.8
mport package installation has symlink TOCTOU in chown and chmod handling
mport is the MidnightBSD Package Manager. Prior to 2.7.8, do_actual_install() in libmport/bundle_read_install_pkg.c used path-based lstat(), chown(), stat(), and chmod() operations while installing package files. A local attacker with write access to a target…
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Medium 5.8
mport directory asset installation is vulnerable to symlink and path traversal races
mport is the MidnightBSD Package Manager. Prior to 2.7.8, directory assets handled as ASSET_DIR or ASSET_DIR_OWNER_MODE in libmport/bundle_read_install_pkg.c used path-based mport_mkdirp(), ownership, and permission operations. A local attacker able to modify…
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Medium 5.8
mport package fetch and clean paths are vulnerable to TOCTOU filesystem races
mport is the MidnightBSD Package Manager. Prior to 2.7.8, privileged package fetch and cache-cleaning operations used race-prone path handling across libmport/fetch.c, libmport/clean.c, libmport/util.c, libmport/bundle_read_install_pkg.c, libmport/delete_prim…
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Medium 5.9
pgAdmin 4: File Manager save_file writes through a symbolic link planted after the containment check
pgAdmin 4's File Manager save_file endpoint, which backs saving from the Query Tool and ERD, validated the requested path with Filemanager.check_access_permission() and then opened the file for writing with a plain open() call. CVE-2026-7819 had previously ha…
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Critical 9.1
Magic link single-use tokens replayable via TOCTOU race in AshAuthentication
Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in team-alembic AshAuthentication allows an attacker holding a leaked magic link to replay its single-use token and authenticate as the target subject. A magic link configured with single_use_tok…
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High 7.8
Time-of-check Time-of-use (TOCTOU) Race Condition in Automotive Software platform based on QNX
Memory Corruption when processing I2C transfer requests due to a race condition between memory allocation and data copying.
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Medium 6.4
Time-of-check Time-of-use (TOCTOU) Race Condition in GitLab
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 13.0 before 19.1.8, 19.2 before 19.2.6, and 19.3 before 19.3.2 that under certain conditions could have allowed a developer user to perform actions in the context of another user's mer…
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Low 3.1
Race condition in Network in Google Chrome prior to 153.0.8010.47 allowed a remote attacker who had compromised the ren…
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High 8.3
Race condition in Extensions in Google Chrome on on Mac prior to 153.0.8010.47 allowed a remote attacker who had compro…
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High 8.3
Race condition in Extensions in Google Chrome on on Mac prior to 153.0.8010.47 allowed a remote attacker who had compro…
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Medium 5.3
Race condition in PlatformIntegration in Google Chrome on on Mac prior to 153.0.8010.47 allowed a remote attacker who h…
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High 8.3
Race condition in Core in Google Chrome prior to 153.0.8010.47 allowed a remote attacker who had compromised the render…