Common Weakness Enumeration

CWE-1284

Allowed

Improper Validation of Specified Quantity in Input

Abstraction: Base · Status: Incomplete

The product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties.

549 vulnerabilities reference this CWE, most recent first.

CVE-2026-9801 (GCVE-0-2026-9801)

Vulnerability from cvelistv5 – Published: 2026-05-28 04:42 – Updated: 2026-06-26 06:46
VLAI
Title
Keycloak: keycloak: denial of service via malformed ldap password policy response
Summary
A flaw was found in Keycloak. A remote attacker with high privileges, such as a realm administrator configuring a malicious Lightweight Directory Access Protocol (LDAP) server or an attacker compromising an upstream LDAP server, could exploit this vulnerability. By sending a malformed LDAP password policy response during a password authentication request, the attacker can trigger an OutOfMemoryError. This causes the Keycloak Java Virtual Machine (JVM) to terminate, leading to a denial of service (DoS) for all realms on the affected node.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-30 01:53 UTC
CWE
  • CWE-1284 - Improper Validation of Specified Quantity in Input
References
URL Tags
https://access.redhat.com/errata/RHSA-2026:25097 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:25098 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:30049 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:30050 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-9801 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2482473 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Red Hat build of Keycloak 26.4 Unaffected: 26.4.13-1 , < * (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: 26.4-19 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.4::el9
Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.4.13     cpe:/a:redhat:build_keycloak:26.4::el9
Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.6 Unaffected: 26.6.3-3 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.6::el9
Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.6 Unaffected: 26.6-6 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.6::el9
Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.6.3     cpe:/a:redhat:build_keycloak:26.6::el9
Create a notification for this product.
Date Public
2026-05-28 04:18
Show details on NVD website

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CVE-2026-9704 (GCVE-0-2026-9704)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:56 – Updated: 2026-06-26 06:46
VLAI
Title
Keycloak: keycloak: privilege escalation due to oversized subject_token jwt
Summary
A flaw was found in Keycloak. An authenticated user with low privileges can exploit this vulnerability by sending an oversized subject_token JSON Web Token (JWT) to the TokenEndpoint. When the token exceeds a 4000-character limit, it is silently dropped, causing the system to fall back to client credentials. This allows the user to gain the permissions of the client's service account, leading to privilege escalation.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-27 15:29 UTC
CWE
  • CWE-1284 - Improper Validation of Specified Quantity in Input
References
URL Tags
https://access.redhat.com/errata/RHSA-2026:25097 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:25098 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:30049 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:30050 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-9704 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2481877 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Red Hat build of Keycloak 26.4 Unaffected: 26.4.13-1 , < * (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: 26.4-19 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.4::el9
Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.4.13     cpe:/a:redhat:build_keycloak:26.4::el9
Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.6 Unaffected: 26.6.3-3 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.6::el9
Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.6 Unaffected: 26.6-6 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.6::el9
Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.6.3     cpe:/a:redhat:build_keycloak:26.6::el9
Create a notification for this product.
Date Public
2026-05-27 12:45
Show details on NVD website

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CVE-2026-8047 (GCVE-0-2026-8047)

Vulnerability from cvelistv5 – Published: 2026-05-26 06:49 – Updated: 2026-05-26 10:48
VLAI
Title
Out-of-bounds Write in CODESYS Control
Summary
The affected products perform improper length checking when parsing incoming HTTP requests, resulting in a size-limited out-of-bounds write. An unauthenticated remote attacker can exploit this flaw to cause a denial of service via a system crash on the affected device.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-26 10:45 UTC
CWE
  • CWE-1284 - Improper Validation of Specified Quantity in Input
References
Impacted products
Vendor Product Version
CODESYS CODESYS Control RTE (SL) Affected: 3.5.21.0 , < 3.5.22.20 (semver)
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CODESYS CODESYS Control RTE (for Beckhoff CX) SL Affected: 3.5.21.0 , < 3.5.22.20 (semver)
Create a notification for this product.
CODESYS CODESYS Control Win (SL) Affected: 3.5.21.0 , < 3.5.22.20 (semver)
Create a notification for this product.
CODESYS CODESYS HMI (SL) Affected: 3.5.21.0 , < 3.5.22.20 (semver)
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CODESYS CODESYS Runtime Toolkit Affected: 3.5.21.0 , < 3.5.22.20 (semver)
Create a notification for this product.
CODESYS CODESYS Control for BeagleBone SL Affected: 4.15.0.0 , < 4.21.0.0 (semver)
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CODESYS CODESYS Control for emPC-A/iMX6 SL Affected: 4.15.0.0 , < 4.21.0.0 (semver)
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CODESYS CODESYS Control for IOT2000 SL Affected: 4.15.0.0 , < 4.21.0.0 (semver)
Create a notification for this product.
CODESYS CODESYS Control for Linux ARM SL Affected: 4.15.0.0 , < 4.21.0.0 (semver)
Create a notification for this product.
CODESYS CODESYS Control for Linux SL Affected: 4.15.0.0 , < 4.21.0.0 (semver)
Create a notification for this product.
CODESYS CODESYS Control for PFC100 SL Affected: 4.15.0.0 , < 4.21.0.0 (semver)
Create a notification for this product.
CODESYS CODESYS Control for PFC200 SL Affected: 4.15.0.0 , < 4.21.0.0 (semver)
Create a notification for this product.
CODESYS CODESYS Control for PLCnext SL Affected: 4.15.0.0 , < 4.21.0.0 (semver)
Create a notification for this product.
CODESYS CODESYS Control for Raspberry Pi SL Affected: 4.15.0.0 , < 4.21.0.0 (semver)
Create a notification for this product.
CODESYS CODESYS Control for WAGO Touch Panels 600 SL Affected: 0.0.0 , < 4.21.0.0 (semver)
Create a notification for this product.
CODESYS CODESYS Virtual Control SL Affected: 4.15.0.0 , < 4.21.0.0 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2026-7254 (GCVE-0-2026-7254)

Vulnerability from cvelistv5 – Published: 2026-05-27 13:12 – Updated: 2026-05-27 14:48
VLAI
Title
Open BMC Denial of Service
Summary
IBM OPENBMC FW1110.00 through FW1110.11 is vulnerable to denial of service attacks by unauthenticated network users.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-27 14:48 UTC
CWE
  • CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
References
URL Tags
https://www.ibm.com/support/pages/node/7272993 vendor-advisorypatch
Impacted products
Vendor Product Version
IBM OPENBMC Affected: FW1110.00 , ≤ FW1110.11 (semver)
    cpe:2.3:a:ibm:openbmc:fw1110.00:*:*:*:*:*:*:*
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    cpe:2.3:a:ibm:openbmc:fw1110.11.0:*:*:*:*:*:*:*
Create a notification for this product.
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CVE-2026-6915 (GCVE-0-2026-6915)

Vulnerability from cvelistv5 – Published: 2026-04-29 16:51 – Updated: 2026-04-29 17:49
VLAI
Title
Flaw in the updateUser Command May Allow Unauthorized Configuration Change
Summary
An authorization flaw in the user management command could allow an authenticated user to make limited changes to authentication-related data associated with another user account. This could affect how authentication is performed for the impacted account.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-29 17:49 UTC
CWE
  • CWE-1284 - Improper validation of specified quantity in input
References
Impacted products
Vendor Product Version
MongoDB MongoDB Server Affected: 8.2.0 , < 8.2.7 (custom)
Affected: 8.0.0 , < 8.0.21 (custom)
Affected: 7.0.0 , < 7.0.32 (custom)
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CVE-2026-6839 (GCVE-0-2026-6839)

Vulnerability from cvelistv5 – Published: 2026-04-22 06:07 – Updated: 2026-04-22 12:30
VLAI
Summary
Improper validation of STRING tensor offsets could allows malformed string metadata to trigger out of bounds access during constant tensor import in Samsung Open Source ONE Affected version is prior to commit 1.30.0.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-22 12:29 UTC
CWE
  • CWE-1284 - Improper validation of specified quantity in input
References
Impacted products
Vendor Product Version
Samsung Open Source ONE Affected: 1.30.0
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CVE-2026-3676 (GCVE-0-2026-3676)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:48 – Updated: 2026-05-27 14:38
VLAI
Title
There are multiple vulnerabilities in IBM DB2 bundled with IBM Application Performance Management products.
Summary
IBM Cloud APM, Base Private 8.1.4 and IBM Cloud APM, Advanced Private 8.1.4 IBM Db2 for Linux, UNIX and Windows (includes DB2 Connect Server) could allow an authenticated user to cause a denial of service due to improper neutralization of special elements in the data query logic of the Fenced environment.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-27 14:34 UTC
CWE
  • CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
References
URL Tags
https://www.ibm.com/support/pages/node/7273649 vendor-advisorypatch
Impacted products
Vendor Product Version
IBM Cloud APM, Base Private Affected: 8.1.4 , ≤ ) Interim Fix 021 (semver)
    cpe:2.3:a:ibm:cloud_apm_base_private:8.1.4:*:*:*:*:*:*:*
Create a notification for this product.
IBM Cloud APM, Advanced Private Affected: 8.1.4
    cpe:2.3:a:ibm:cloud_apm_advanced_private:8.1.4:*:*:*:*:*:*:*
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Show details on NVD website

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              "value": "\u003cp\u003eThe vulnerabilities can be remediated by first applying the necessary fixes to your DB2 V11.5 server. The fixes can be accessed from the following security bulletins:\u003c/p\u003e\u003cp\u003eSecurity Bulletin: \u003ca href=\"https://www.ibm.com/support/pages/security-bulletin-ibm%C2%AE-db2%C2%AE-vulnerable-denial-service-specially-crafted-query-when-stmtheap-set-automatic-cve-2025-36122\" rel=\"nofollow\"\u003eSecurity Bulletin: IBM\u00ae Db2\u00ae is vulnerable to a denial of service with a specially crafted query when stmtheap is set to automatic (CVE-2025-36122)\u003c/a\u003e\u003c/p\u003e\u003cp\u003eSecurity Bulletin: \u003ca href=\"https://www.ibm.com/support/pages/security-bulletin-ibm%C2%AE-db2%C2%AE-vulnerable-denial-service-when-fetching-certain-tables-under-specific-configurations-cve-2025-14688\" rel=\"nofollow\"\u003eSecurity Bulletin: IBM\u00ae Db2\u00ae is vulnerable to a denial of service when fetching from certain tables under specific configurations (CVE-2025-14688)\u003c/a\u003e\u003c/p\u003e\u003cp\u003eSecurity Bulletin:\u0026nbsp;\u003ca href=\"https://www.ibm.com/support/pages/security-bulletin-ibm%C2%AE-db2%C2%AE-affected-vulnerability-netty-codec-http-41127-cve-2025-67735\" rel=\"nofollow\"\u003eSecurity Bulletin: IBM\u00ae Db2\u00ae is affected by a vulnerability in netty-codec-http-4.1.127 (CVE-2025-67735)\u003c/a\u003e\u003c/p\u003e\u003cp\u003eSecurity Bulletin: \u003ca href=\"https://www.ibm.com/support/pages/node/7257695\" rel=\"nofollow\"\u003ehttps://www.ibm.com/support/pages/security-bulletin-ibm%C2%AE-db2%C2%AE-vulnerable-trap-or-return-sqlcode-901-when-compiling-specially-crafted-query-defined-index-cve-2026-1352\u003c/a\u003e\u003c/p\u003e\u003cp\u003eSecurity Bulletin: \u003ca href=\"https://www.ibm.com/support/pages/security-bulletin-ibm%C2%AE-db2%C2%AE-vulnerable-denial-service-specially-crafted-query-involving-multiple-subqueries-cve-2026-1577\" rel=\"nofollow\"\u003eSecurity Bulletin: IBM\u00ae Db2\u00ae is vulnerable to a denial of service with a specially crafted query involving multiple subqueries (CVE-2026-1577)\u003c/a\u003e\u003c/p\u003e\u003cp\u003eTo use your updated DB2 V11.5 server with your IBM Cloud Application Performance Management product, apply the 8.1.4.0-IBM-APM-SERVER-IF0004 or later server patch to the system where the Cloud APM server is installed. Interim fixes for the Cloud APM server version 8.1.4 are available to download from IBM Fix Central at this link:\u003c/p\u003e\u003cp\u003e\u003ca href=\"https://www.ibm.com/support/fixcentral/swg/selectFixes?product=ibm%2FTivoli%2FIBM+Application+Performance+Management\u0026amp;fixids=8.1.4.0-IBM-APM-SERVER-IF0019\u0026amp;source=SAR\u0026amp;function=fixId\u0026amp;parent=IBM%20Performance%20Management%20family\" rel=\"nofollow\"\u003ehttps://www.ibm.com/support/fixcentral/swg/selectFixes?product=ibm%2FTivoli%2FIBM+Application+Performance+Management\u0026amp;fixids=8.1.4.0-IBM-APM-SERVER-IF0019\u0026amp;source=SAR\u0026amp;function=fixId\u0026amp;parent=IBM%20Performance%20Management%20family\u003c/a\u003e\u003c/p\u003e"
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CVE-2026-2597 (GCVE-0-2026-2597)

Vulnerability from cvelistv5 – Published: 2026-02-26 23:29 – Updated: 2026-02-27 18:50
VLAI
Title
Crypt::SysRandom::XS versions before 0.010 for Perl is vulnerable to a heap buffer overflow in the XS function random_bytes()
Summary
Crypt::SysRandom::XS versions before 0.010 for Perl is vulnerable to a heap buffer overflow in the XS function random_bytes(). The function does not validate that the length parameter is non-negative. If a negative value (e.g. -1) is supplied, the expression length + 1u causes an integer wraparound, resulting in a zero-byte allocation. The subsequent call to chosen random function (e.g. getrandom) passes the original negative value, which is implicitly converted to a large unsigned value (typically SIZE_MAX). This can result in writes beyond the allocated buffer, leading to heap memory corruption and application crash (denial of service). In common usage, the length argument is typically hardcoded by the caller, which reduces the likelihood of attacker-controlled exploitation. Applications that pass untrusted input to this parameter may be affected.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-27 18:50 UTC
CWE
  • CWE-122 - Heap-based Buffer Overflow
  • CWE-1284 - Improper Validation of Specified Quantity in Input
Impacted products
Vendor Product Version
LEONT Crypt::SysRandom::XS Affected: 0 , < 0.010 (custom)
Create a notification for this product.
Show details on NVD website

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CVE-2026-2474 (GCVE-0-2026-2474)

Vulnerability from cvelistv5 – Published: 2026-02-16 20:54 – Updated: 2026-02-17 14:48
VLAI
Title
Crypt::URandom versions from 0.41 before 0.55 for Perl is vulnerable to a heap buffer overflow in the XS function crypt_urandom_getrandom()
Summary
Crypt::URandom versions from 0.41 before 0.55 for Perl is vulnerable to a heap buffer overflow in the XS function crypt_urandom_getrandom(). The function does not validate that the length parameter is non-negative. If a negative value (e.g. -1) is supplied, the expression length + 1u causes an integer wraparound, resulting in a zero-byte allocation. The subsequent call to getrandom(data, length, GRND_NONBLOCK) passes the original negative value, which is implicitly converted to a large unsigned value (typically SIZE_MAX). This can result in writes beyond the allocated buffer, leading to heap memory corruption and application crash (denial of service). In common usage, the length argument is typically hardcoded by the caller, which reduces the likelihood of attacker-controlled exploitation. Applications that pass untrusted input to this parameter may be affected.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-17 14:47 UTC
CWE
  • CWE-122 - Heap-based Buffer Overflow
  • CWE-1284 - Improper Validation of Specified Quantity in Input
Impacted products
Vendor Product Version
DDICK Crypt::URandom Affected: 0.41 , < 0.55 (custom)
Create a notification for this product.
Show details on NVD website

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CVE-2026-2403 (GCVE-0-2026-2403)

Vulnerability from cvelistv5 – Published: 2026-04-14 15:21 – Updated: 2026-04-14 16:27
VLAI
Summary
CWE-1284 Improper Validation of Specified Quantity in Input vulnerability exists that could cause Event and Data Log truncation impacting log integrity when a Web Admin user alters the POST /logsettings request payload.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-14 16:23 UTC
CWE
  • CWE-1284 - Improper Validation of Specified Quantity in Input
Impacted products
Show details on NVD website

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Mitigation MIT-5
Implementation

Strategy: Input Validation

  • Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
  • When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
  • Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.

No CAPEC attack patterns related to this CWE.