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-2026-1035 (GCVE-0-2026-1035)

Vulnerability from cvelistv5 – Published: 2026-01-21 05:52 – Updated: 2026-04-02 16:47
VLAI
Title
Org.keycloak.protocol.oidc: keycloak refresh token reuse bypass via toctou race condition
Summary
A flaw was found in the Keycloak server during refresh token processing, specifically in the TokenManager class responsible for enforcing refresh token reuse policies. When strict refresh token rotation is enabled, the validation and update of refresh token usage are not performed atomically. This allows concurrent refresh requests to bypass single-use enforcement and issue multiple access tokens from the same refresh token. As a result, Keycloak’s refresh token rotation hardening can be undermined.
Severity
3.1 (Low)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
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
References
URL Tags
https://access.redhat.com/errata/RHSA-2026:6477 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:6478 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-1035 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2430314 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Red Hat build of Keycloak 26.4 Unaffected: 26.4.11-1 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.4::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.4 Unaffected: 26.4-14 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.4::el9
 Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.4.11     cpe:/a:redhat:build_keycloak:26.4::el9
 Create a notification for this product.
Red Hat Red Hat JBoss Enterprise Application Platform 8     cpe:/a:redhat:jboss_enterprise_application_platform:8
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Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack     cpe:/a:redhat:jbosseapxp
 Create a notification for this product.
Red Hat Red Hat Single Sign-On 7     cpe:/a:redhat:red_hat_single_sign_on:7
 Create a notification for this product.
Date Public
2026-01-21 00:00
Credits
Red Hat would like to thank Mohamed Amine ait Ouchebou (mrecho) (Indiesecurity) for reporting this issue.
Show details on NVD website
To clipboard 

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CVE-2026-12374 (GCVE-0-2026-12374)

Vulnerability from cvelistv5 – Published: 2026-07-01 14:07 – Updated: 2026-07-01 15:07
VLAI
Title
Improper XPC caller certificate validation and TOCTOU race condition in macOS PrivilegedHelperTool
Summary
Improper certificate validation and a time-of-check time-of-use (TOCTOU) race condition in the PrivilegedHelperTool XPC service in Cato Client before v.5.13.1 on macOS allows a local authenticated attacker to escalate privileges to root via a self-signed certificate that bypasses the XPC caller verification and a symlink swap during package installation.
Severity
6.4 (Medium)
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/AU:Y/R:U/V:C/RE:L/U:Amber
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-295 - Improper certificate validation
  • CWE-367 - Time-of-check time-of-use (TOCTOU) race condition
Assigner
References
Impacted products
Vendor Product Version
Cato Networks SDP Client Affected: 5.12.0 , < 5.13.1 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-13502 (GCVE-0-2026-13502)

Vulnerability from cvelistv5 – Published: 2026-06-28 14:45 – Updated: 2026-06-29 13:44
VLAI
Title
antlr ANTLR4 Maven Plugin GrammarDependencies.java ObjectInputStream.readObject toctou
Summary
A flaw has been found in antlr ANTLR4 up to 4.13.2. This affects the function ObjectInputStream.readObject of the file antlr4-maven-plugin/src/main/java/org/antlr/mojo/antlr4/GrammarDependencies.java of the component Maven Plugin. This manipulation causes time-of-check time-of-use. The attack is restricted to local execution. A high degree of complexity is needed for the attack. It is indicated that the exploitability is difficult. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
2 (Low)
CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
4.5 (Medium)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
4.5 (Medium)
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
URL Tags
https://vuldb.com/vuln/374498 vdb-entrytechnical-description
https://vuldb.com/vuln/374498/cti signaturepermissions-required
https://vuldb.com/cve/CVE-2026-13502 third-party-advisory
https://vuldb.com/submit/838685 third-party-advisory
https://github.com/wooyun123/wooyun/issues/7 exploitissue-tracking
Impacted products
Vendor Product Version
antlr ANTLR4 Affected: 4.13.0
Affected: 4.13.1
Affected: 4.13.2
    cpe:2.3:a:antlr:antlr4:*:*:*:*:*:*:*:*
 Create a notification for this product.
Credits
jiazhou (VulDB User) VulDB CNA Team
Show details on NVD website
To clipboard 

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CVE-2026-13742 (GCVE-0-2026-13742)

Vulnerability from cvelistv5 – Published: 2026-06-29 15:19 – Updated: 2026-06-29 16:24
VLAI
Title
Lack of signature verification before execution of downloaded content
Summary
Honeywell IQ MultiAccess, all versions prior to and including version 28, contain an improper digital signature verification vulnerability. An attacker could potentially exploit this vulnerability, leading to the replacement of downloaded file with a malicious one. Honeywell also recommends updating to the most recent version of this product, service, or offering [V27 SP1, V28 SP1]
Severity
5.9 (Medium)
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N
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
Honeywell Technologies IQ MultiAccess Affected: IQ.v27 , ≤ 28 (custom)
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CVE-2026-14160 (GCVE-0-2026-14160)

Vulnerability from cvelistv5 – Published: 2026-06-30 02:09 – Updated: 2026-06-30 13:00
VLAI
Summary
Time-of-check time-of-use (TOCTOU) race condition vulnerability in Samsung Open Source Escargot allows Leveraging Race Conditions. This issue affects Escargot: bab3a5797557014ce3c2e28419a6310cfba90d0d.
Severity
5.9 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
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
References
Impacted products
Vendor Product Version
Samsung Open Source Escargot Affected: bab3a5797557014ce3c2e28419a6310cfba90d0d
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CVE-2026-1880 (GCVE-0-2026-1880)

Vulnerability from cvelistv5 – Published: 2026-04-16 02:00 – Updated: 2026-04-16 12:31
VLAI
Summary
An Incorrect Permission Assignment for Critical Resource vulnerability in the ASUS DriverHub update process allows privilege escalation due to improper protection of required execution resources during the validation phase, permitting a local user to make unprivileged modifications. This allows the altered resource to pass system checks and be executed with elevated privileges upon a user-initiated update. Refer to the 'Security Update for ASUS DriverHub' section on the ASUS Security Advisory for more information.
Severity
5.4 (Medium)
CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
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
ASUS DriverHub Affected: 0 , < 1.0.6.12 (custom)
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Show details on NVD website
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CVE-2026-20438 (GCVE-0-2026-20438)

Vulnerability from cvelistv5 – Published: 2026-03-02 08:39 – Updated: 2026-03-30 13:05
VLAI
Summary
In MAE, there is a possible out of bounds write due to a race condition. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS10431920; Issue ID: MSV-5835.
Severity
6.4 (Medium)
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
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
MediaTek, Inc. MediaTek chipset Affected: MT2718
Affected: MT6899
Affected: MT6991
Affected: MT8168
Affected: MT8169
Affected: MT8186
Affected: MT8188
Affected: MT8678
Affected: MT8695
Affected: MT8696
Affected: MT8793
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CVE-2026-20445 (GCVE-0-2026-20445)

Vulnerability from cvelistv5 – Published: 2026-03-02 08:39 – Updated: 2026-03-30 13:06
VLAI
Summary
In MDDP, there is a possible system crash due to a race condition. This could lead to local denial of service if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS10289875; Issue ID: MSV-5184.
Severity
4.4 (Medium)
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
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
References
Impacted products
Vendor Product Version
MediaTek, Inc. MediaTek chipset Affected: MT6835
Affected: MT6855
Affected: MT6878
Affected: MT6879
Affected: MT6883
Affected: MT6885
Affected: MT6886
Affected: MT6889
Affected: MT6893
Affected: MT6895
Affected: MT6897
Affected: MT6899
Affected: MT6983
Affected: MT6985
Affected: MT6989
Affected: MT6991
Affected: MT6993
Affected: MT8188
Affected: MT8678
Affected: MT8755
Affected: MT8771
Affected: MT8797
Affected: MT8798
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-20454 (GCVE-0-2026-20454)

Vulnerability from cvelistv5 – Published: 2026-06-01 03:20 – Updated: 2026-06-02 03:55
VLAI
Summary
In geniezone, there is a possible out of bounds write due to a race condition. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS10873936; Issue ID: MSV-6786.
Severity
6.4 (Medium)
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
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
MediaTek, Inc. MediaTek chipset Affected: MT6739
Affected: MT6761
Affected: MT6765
Affected: MT6768
Affected: MT6781
Affected: MT6789
Affected: MT6835
Affected: MT6853
Affected: MT6855
Affected: MT6877
Affected: MT6878
Affected: MT6879
Affected: MT6883
Affected: MT6885
Affected: MT6886
Affected: MT6889
Affected: MT6893
Affected: MT6895
Affected: MT6897
Affected: MT6899
Affected: MT6983
Affected: MT6985
Affected: MT6989
Affected: MT6991
Affected: MT8673
Affected: MT8765
Affected: MT8766
Affected: MT8768
Affected: MT8781
Affected: MT8786
Affected: MT8788
Affected: MT8791T
Affected: MT8793
Affected: MT8797
Affected: MT8798
Affected: MT8910
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-20796 (GCVE-0-2026-20796)

Vulnerability from cvelistv5 – Published: 2026-02-13 10:30 – Updated: 2026-02-13 17:02
VLAI
Title
Time-of-check time-of-use vulnerability in common teams API
Summary
Mattermost versions 10.11.x <= 10.11.9 fail to properly validate channel membership at the time of data retrieval which allows a deactivated user to learn team names they should not have access to via a race condition in the /common_teams API endpoint.. Mattermost Advisory ID: MMSA-2025-00549
Severity
3.1 (Low)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
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
References
URL Tags
https://mattermost.com/security-updates vendor-advisory
Impacted products
Vendor Product Version
Mattermost Mattermost Affected: 10.11.0 , ≤ 10.11.9 (semver)
Unaffected: 11.3.0
Unaffected: 10.11.10
Create a notification for this product.
Credits
Juho Forsén
Show details on NVD website
To clipboard 

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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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