Common Weakness Enumeration

CWE-367

Allowed

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

Abstraction: Base · Status: Incomplete

API response cwe.mitre.org

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.

626 vulnerabilities reference this CWE, most recent first.

CVE-2026-116240 (GCVE-0-2026-116240)

Vulnerability from cvelistv5 – Published: 2026-10-30 19:55 – Updated: 2026-11-06 16:09
VLAI
Title
pgAdmin 4: File Manager and storage-path tools act on a different path from the one checked
Summary
In server mode pgAdmin 4 validates a path into the user's storage directory with check_access_permission(), which builds the absolute path with get_abs_path(). Several callers then acted on a path they built differently, so the path checked and the path used could name different files: - Opening a file in the Query Tool, the Google client secret and, on Windows, Import/Export Data, Backup, Restore and saving a file joined the path to the storage directory after stripping leading slashes and backslashes. On POSIX a path checked as a name inside storage could become an absolute path once stripped, so any file the pgAdmin account can read could be opened; on Windows a path naming a drive discarded the storage directory, so these could read, or write, outside it. - Listing a folder decoded the path a second time after the check, so a folder named like an encoded "..", which a user can create, listed any directory on the host. - Download, delete, rename and the file-exists check appended the path to the storage directory without a separator, so in a deployment where one user's storage directory name is a prefix of another's, another user's files could be read, deleted or moved; download also checked the path appended to itself. - Creating a folder could create one in another user's directory. The fix makes check_access_permission() return the path it checked and every caller act on that path, decodes folder paths once, and opens, deletes and renames files relative to directories opened from the storage directory without following symbolic links. Desktop mode is not affected. This issue affects pgAdmin 4: before 9.19.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
7.1 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-06 16:08 UTC
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
Impacted products
Vendor Product Version
pgadmin.org pgAdmin 4 Affected: 0 , < 9.19 (custom)
Create a notification for this product.
Date Public
2026-10-29 00:00
Credits
Ashesh Vashi <ashesh.vashi@enterprisedb.com> Hitesh Jambhale <hitesh.jambhale@enterprisedb.com>
Show details on NVD website
To clipboard 

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CVE-2026-115683 (GCVE-0-2026-115683)

Vulnerability from cvelistv5 – Published: 2026-10-30 13:33 – Updated: 2026-11-02 11:33
VLAI
Title
epiphany: TLS certificate warning bypass via race in tlsErrorPage message handler
Summary
A race condition in Epiphany allows a malicious website to bypass the TLS/SSL certificate warning page. Epiphany registers the main-world script message handler "tlsErrorPage" so its internal TLS error page can implement "Accept Risk and Proceed". The handler was registered immediately before loading the error page, leaving a brief window where the previously loaded untrusted origin could still call window.webkit.messageHandlers.tlsErrorPage.postMessage(...). The only authorization check compares a numeric WebKit page id that increments predictably; an attacker can burst-guess ids and approve a certificate exception with no user click. If a victim visits malicious site A that redirects to site B with an invalid certificate, site A can, for a few milliseconds, disable TLS certificate error warnings for host B until Epiphany is restarted, enabling man-in-the-middle or site spoofing for that host. Upstream report: https://gitlab.gnome.org/GNOME/epiphany/-/work_items/2978 Proof of concept: https://beford.net/poc/ssl_poc.html Fix: https://gitlab.gnome.org/GNOME/epiphany/-/merge_requests/2245 (register handlers on LOAD_COMMITTED). No fixed release tagged yet; reporter and maintainer describe all current versions as affected. Maintainer notes the risky registration timing dates to commit 1da1caed (Epiphany 45.x era); before that the handlers were always registered and similarly reachable from web content.
Severity
6.8 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 14:07 UTC
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
fedora CNA
References
Impacted products
Vendor Product Version
GNOME Epiphany Affected: 0 , < 51.1 (semver)
Create a notification for this product.
Date Public
2026-10-21 00:00
Credits
Red Hat would like to thank Fernando Munoz for reporting this issue.
Show details on NVD website
To clipboard 

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CVE-2026-114594 (GCVE-0-2026-114594)

Vulnerability from cvelistv5 – Published: 2026-11-09 16:15 – Updated: 2026-11-09 16:15
VLAI
Title
Time-of-check time-of-use (TOCTOU) race condition in Sandisk Dashboard Installer
Summary
A time-of-check to time-of-use (TOCTOU) race condition in the Sandisk Dashboard installer allows a local, authenticated standard user to replace an installer-staged binary in a user-writable temporary directory between validation and execution. The elevated installer then executes the attacker-controlled binary, resulting in local privilege escalation to a high-integrity (administrative) context. This issue affects Sandisk Dashboard through 5.2.2.3.
Severity
5.4 (Medium)
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CWE
  • CWE-367 - Time-of-check time-of-use (TOCTOU) race condition
  • CWE-379 - Creation of temporary file in directory with insecure permissions
Assigner
SDC CNA
References
Impacted products
Vendor Product Version
Sandisk Sandisk Dashboard Affected: 0 , ≤ 5.2.2.3 (custom)
Create a notification for this product.
Credits
Johan Francsics
Show details on NVD website
To clipboard 

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CVE-2026-112941 (GCVE-0-2026-112941)

Vulnerability from cvelistv5 – Published: 2026-10-20 14:43 – Updated: 2026-10-28 14:14
VLAI
Title
filelock: SoftReadWriteLock follows a lock tree swapped in after its first acquire and writes lock records into directories of the user running the lock
Summary
filelock is a platform-independent file lock for Python. From 4.1.0 until 4.2.1, SoftReadWriteLock and AsyncSoftReadWriteLock cache a successful check of the <path>.rw lock tree and resolve its names again during later record operations, allowing another local user who can replace that tree after the first acquisition to redirect lock-record writes into directories writable by the lock user. This issue is fixed in version 4.2.1.
Severity
3.3 (Low)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-28 14:14 UTC
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
GitHub_M CNA
References
Impacted products
Vendor Product Version
tox-dev filelock Affected: >= 4.1.0, < 4.2.1
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-112937 (GCVE-0-2026-112937)

Vulnerability from cvelistv5 – Published: 2026-10-20 14:36 – Updated: 2026-10-21 15:55
VLAI
Title
filelock: ReadWriteLock on the hard-link route deletes any directory another user renames onto its .filelock-* link directory name
Summary
filelock is a platform-independent file lock for Python. From 4.1.0 until 4.2.1, ReadWriteLock can remove a randomized .filelock-* private-hard-link directory during cleanup, allowing another local user with rename access in a non-sticky parent to observe a live name or forge a dead-owner sweep name and rename a sibling directory onto it for deletion. This issue is fixed in version 4.2.1.
Severity
6.1 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-21 14:24 UTC
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
GitHub_M CNA
References
Impacted products
Vendor Product Version
tox-dev filelock Affected: >= 4.1.0, < 4.2.1
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-112935 (GCVE-0-2026-112935)

Vulnerability from cvelistv5 – Published: 2026-10-20 14:32 – Updated: 2026-10-28 14:17
VLAI
Title
filelock: SoftFileLock stale-lock break removes a live lock file on a reused inode number and admits two holders
Summary
filelock is a platform-independent file lock for Python. From 3.22.0 until 4.2.1, SoftFileLock can break a stale marker after an attacker frees its own marker following the stale read, an honest contender creates a live successor on the reused inode, and the successor's modification time is not newer than the saved observation, causing the live marker to be removed and two holders to be admitted. This issue is fixed in version 4.2.1.
Severity
4.7 (Medium)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-28 14:16 UTC
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
GitHub_M CNA
References
Impacted products
Vendor Product Version
tox-dev filelock Affected: >= 3.22.0, < 4.2.1
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-112913 (GCVE-0-2026-112913)

Vulnerability from cvelistv5 – Published: 2026-11-05 21:48 – Updated: 2026-11-06 17:37
VLAI
Title
filelock: ReadWriteLock on Windows acts on SQLite side files another local user places beside its database
Summary
filelock is a platform-independent file lock for Python. From 3.20.4 until 4.2.1, ReadWriteLock and AsyncReadWriteLock on Windows use _connect to attach SQLite to the lock database by pathname, allowing another local account that can create adjacent names to place a database-wal or database-journal side file before acquisition. An undeletable WAL file makes each read or write acquisition fail immediately with sqlite3.OperationalError regardless of timeout. Separately, when the database contains at least one table, a hot journal that grants the lock account modify rights can cause SQLite recovery to delete a file named by that journal only when the lock account has permission to delete the target. The issue requires a directory writable by another account, such as a shared Windows temporary directory, and does not affect private directories. This issue is fixed in version 4.2.1.
Severity
3.3 (Low)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-06 17:37 UTC
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
GitHub_M CNA
References
Impacted products
Vendor Product Version
tox-dev filelock Affected: >= 3.20.4, < 4.2.1
Create a notification for this product.
Show details on NVD website
To clipboard 

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        },
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          "name": "https://github.com/tox-dev/filelock/pull/854",
          "tags": [
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CVE-2026-112110 (GCVE-0-2026-112110)

Vulnerability from cvelistv5 – Published: 2026-11-05 17:33 – Updated: 2026-11-05 20:10
VLAI
Title
Privileged file deletion in SafeNet Authentication Client SACSrv
Summary
A time-of-check to time-of-use race condition in the SafeNet Authentication Client (SAC) SACSrv log-cleanup function can allow an authenticated, non-administrator local user to redirect a privileged file deletion operation outside the intended log directory.  This issue affects SAC releases up to and including 10.9 R3 GA (build 10.9.7449).
Severity
5.8 (Medium)
CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
6.3 (Medium)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-05 20:10 UTC
CWE
  • CWE-59 - Improper link resolution before file access ('link following')
  • CWE-367 - Time-of-check time-of-use (TOCTOU) race condition
Assigner
THA-PSIRT CNA
References
Impacted products
Vendor Product Version
Thalesgroup Safenet Authentication Client Service Affected: 0 , ≤ 10.9.7449 (custom)
    cpe:2.3:a:thalesgroup:safenet_authentication_client_service:*:*:windows:*:*:*:*:*
Create a notification for this product.
Credits
David Carliez (david.carliez.consulting@gmail.com)
Show details on NVD website
To clipboard 

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CVE-2026-109518 (GCVE-0-2026-109518)

Vulnerability from cvelistv5 – Published: 2026-11-04 15:49 – Updated: 2026-11-05 04:56
VLAI
Title
APT RCE via hard link reuse
Summary
On Debian, Ubuntu, and derivative Linux distributions, an on-path attacker who can manipulate the HTTP traffic (including a malicious mirror or proxy) between an APT client and an archive server triggered by a package install can trick the client into installing an attacker-controlled unverified package and achieve remote code execution with root privileges. The vulnerability is caused by the reuse of hard links and requires the client to follow redirects and retry the download of package files. It requires the client to have a non-zero Acquire::Retries configuration setting; the value 3 is the default starting with Debian 12 (bookworm) and Ubuntu 22.04 LTS (Jammy Jellyfish), so older releases are unaffected in a default configuration
Severity
7.7 (High)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-04 00:00 UTC
CWE
  • CWE-62 - UNIX hard link
  • CWE-367 - Time-of-check time-of-use (TOCTOU) race condition
Assigner
canonical CNA
References
Impacted products
Vendor Product Version
Debian APT Affected: 0 , < 1.2.36 (dpkg)
Affected: 1.4.0 , < 1.4.12 (dpkg)
Affected: 1.6.0 , < 1.6.19 (dpkg)
Affected: 1.8.0 , < 1.8.2.4 (dpkg)
Affected: 1.8.3 , ≤ 1.8.5 (dpkg)
Affected: 2.0.0 , < 2.0.12 (dpkg)
Affected: 2.2.0 , < 2.2.5 (dpkg)
Affected: 2.4.0 , < 2.4.15 (dpkg)
Affected: 2.6.0 , < 2.6.2 (dpkg)
Affected: 2.8.0 , < 2.8.4 (dpkg)
Affected: 3.0.0 , < 3.0.4 (dpkg)
Affected: 3.2.0 , < 3.2.1 (dpkg)
Affected: 3.3.0 , < 3.3.6 (dpkg)
Create a notification for this product.
Ubuntu APT Affected: 0 , < 1.0.1ubuntu2.24+esm4 (dpkg)
Affected: 1.2.0 , < 1.2.36+esm1 (dpkg)
Affected: 1.6.0 , < 1.6.19+esm1 (dpkg)
Affected: 2.0.0 , < 2.0.12+esm1 (dpkg)
Affected: 2.4.0 , < 2.4.15ubuntu0.1 (dpkg)
Affected: 2.8.0 , < 2.8.4ubuntu0.1 (dpkg)
Affected: 3.2.0 , < 3.2.1ubuntu0.1 (dpkg)
Affected: 3.3.0 , < 3.3.3ubuntu0.1 (dpkg)
Create a notification for this product.
Credits
Max Justicz Julian Andres Klode
Show details on NVD website
To clipboard 

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CVE-2026-108741 (GCVE-0-2026-108741)

Vulnerability from cvelistv5 – Published: 2026-10-11 12:19 – Updated: 2026-10-13 17:00
VLAI
Title
Shepherd through 0.3.1 SSRF via DNS Rebinding in Citation Checker
Summary
Shepherd (shepherd-ai) through 0.3.1 contains a server-side request forgery guard bypass in the citation-checker extra because the public_url guard validates a resolved address but fetch re-resolves the hostname at connect time. Attackers who plant a crafted reference URL in a checked document and control its DNS can rebind it to internal addresses, sending GET requests to internal HTTP(S) services and capturing responses in evidence files.
Severity
2.3 (Low)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
3.1 (Low)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-13 15:49 UTC
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
VulnCheck CNA
References
Impacted products
Vendor Product Version
shepherd-agents Shepherd Affected: 0 , ≤ 0.3.1 (semver)
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Date Public
2026-10-10 00:00
Credits
HaiND from the Post and Telecommunication Institute of Technology
Show details on NVD website
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                "timestamp": "2026-10-13T15:49:34.302287Z",
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Mitigation
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.

Mitigation
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.

Mitigation
Architecture and Design

Limit the interleaving of operations on files from multiple processes.

Mitigation
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.

Mitigation
Implementation

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

Mitigation
Architecture and Design

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

Mitigation
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.

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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