Common Weakness Enumeration

CWE-480

Weakness Allowed

Use of Incorrect Operator

Abstraction: Base · Status: Draft

The product accidentally uses the wrong operator, which changes the logic in security-relevant ways.

Mapping guidance

This CWE entry is at the Base level of abstraction, which is a preferred level of abstraction for mapping to the root causes of vulnerabilities.

Carefully read both the name and description to ensure that this mapping is an appropriate fit. Do not try to 'force' a mapping to a lower-level Base/Variant simply to comply with this preferred level of abstraction.

Relationships and members
ChildOf: CWE-670 · View CWE-1000
Modes of introduction
Implementation

These types of errors are generally the result of a typo by the programmer.

Detection methods

Automated Static Analysis

This weakness can be found easily using static analysis. However in some cases an operator might appear to be incorrect, but is actually correct and reflects unusual logic within the program.

Manual Static Analysis

This weakness can be found easily using static analysis. However in some cases an operator might appear to be incorrect, but is actually correct and reflects unusual logic within the program.

Content history
Submission: CLASP · 2006-07-19 · CWE Draft 3
Contribution: Chen Chen, Rahul Kande, Jeyavijayan Rajendran · Texas A&M University · 2023-11-07 · CWE 4.14

suggested demonstrative example

Contribution: Shaza Zeitouni, Mohamadreza Rostami, Ahmad-Reza Sadeghi · Technical University of Darmstadt · 2023-11-07 · CWE 4.14

suggested demonstrative example

Modification: Eric Dalci · Cigital · 2008-07-01 · CWE 1.0

updated Time_of_Introduction

Modification: CWE Content Team · MITRE · 2008-09-08 · CWE 1.0

updated Applicable_Platforms, Relationships, Other_Notes, Taxonomy_Mappings

Modification: CWE Content Team · MITRE · 2008-10-14 · CWE 1.0.1

updated Relationships

Modification: CWE Content Team · MITRE · 2008-11-24 · CWE 1.1

updated Relationships, Taxonomy_Mappings

Modification: CWE Content Team · MITRE · 2011-06-01 · CWE 1.13

updated Common_Consequences, Relationships, Taxonomy_Mappings

Modification: CWE Content Team · MITRE · 2011-09-13 · CWE 2.1

updated Relationships, Taxonomy_Mappings

Modification: CWE Content Team · MITRE · 2012-05-11 · CWE 2.2

updated Common_Consequences, References, Relationships, Taxonomy_Mappings

Modification: CWE Content Team · MITRE · 2012-10-30 · CWE 2.3

updated Demonstrative_Examples, Potential_Mitigations

Modification: CWE Content Team · MITRE · 2014-06-23 · CWE 2.7

updated Applicable_Platforms, Description, Detection_Factors, Other_Notes

Modification: CWE Content Team · MITRE · 2014-07-30 · CWE 2.8

updated Relationships

Modification: CWE Content Team · MITRE · 2017-11-08 · CWE 3.0

updated Demonstrative_Examples, Taxonomy_Mappings

Modification: CWE Content Team · MITRE · 2019-01-03 · CWE 3.2

updated Relationships

Modification: CWE Content Team · MITRE · 2020-02-24 · CWE 4.0

updated References, Relationships, Taxonomy_Mappings

Modification: CWE Content Team · MITRE · 2020-08-20 · CWE 4.2

updated Relationships

Modification: CWE Content Team · MITRE · 2021-03-15 · CWE 4.4

updated Demonstrative_Examples, Relationships

Modification: CWE Content Team · MITRE · 2023-01-31 · CWE 4.10

updated Description, Observed_Examples

Modification: CWE Content Team · MITRE · 2023-04-27 · CWE 4.11

updated Relationships

Modification: CWE Content Team · MITRE · 2023-06-29 · CWE 4.12

updated Mapping_Notes

Modification: CWE Content Team · MITRE · 2023-10-26 · CWE 4.13

updated Observed_Examples

Modification: CWE Content Team · MITRE · 2024-02-29 · CWE 4.14

updated Demonstrative_Examples, References

Modification: CWE Content Team · MITRE · 2025-12-11 · CWE 4.19

updated Weakness_Ordinalities

Modification: CWE Content Team · MITRE · 2026-10-28 · CWE 5.0

updated Demonstrative_Examples, Description, Modes_of_Introduction, References, Relationships

20 vulnerabilities reference this CWE, most recent first.

CVE-2026-123601 (GCVE-0-2026-123601)

Vulnerability from cvelistv5 – Published: 2026-11-08 01:38 – Updated: 2026-11-08 01:38
VLAI
Title
Hickory DNS 0.26.0-beta.1 before 0.26.2 NSEC3 Proof of Nonexistence Forgery
Summary
Hickory DNS hickory-proto 0.25.0 through 0.26.0-alpha.1 and hickory-net 0.26.0-beta.1 before 0.26.2 invert the relational operators in the wrap-around branch of find_covering_record() in nsec3.rs, so the last NSEC3 record in a zone's hash ring covers every hash except its owner. Attackers able to inject DNS responses can replay that NSEC3 record and its RRSIG to forge DNSSEC-validated negative responses denying legitimate names.
CWE
  • CWE-480 - Use of Incorrect Operator
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 7605 records in the last 180 days details
References
Impacted products
Vendor Product Version
hickory-dns hickory-dns Affected: 0.26.0-beta.1 , < 0.26.2 (semver)
Unaffected: 0.26.2 (semver)
Create a notification for this product.
hickory-dns hickory-dns Affected: 0.25.0 , ≤ 0.26.0-alpha.1 (semver)
Create a notification for this product.
Date Public
2026-09-03 00:00
Show details on NVD website

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CVE-2026-83525 (GCVE-0-2026-83525)

Vulnerability from cvelistv5 – Published: 2026-10-28 16:37 – Updated: 2026-11-05 19:04
VLAI
Title
Apache Kafka: Incorrect boolean operator in FetchSnapshot RPC handler allows authenticated network clients to crash the KRaft controller via a malformed request.
Summary
Incorrect operator (CWE-480) in the FetchSnapshot RPC handler in Apache Kafka from 2.8.0 before 4.2.2, and from 4.3.0 before 4.3.2 on all platforms allows an authenticated attacker with CLUSTER_ACTION privilege to cause a denial of service (controller process termination) via a crafted FetchSnapshotRequest with an empty topics array or a topic with no partitions. Users are recommended to upgrade to version 4.2.2, 4.3.2, or 4.4.0, which fix this issue. Users on unsupported branches (4.1.x and earlier) should upgrade to 4.2.2 or later.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-05 19:04 UTC
CWE
  • CWE-480 - Use of incorrect operator
Assigner
apache CNA under the mitre root
CNA scorecard B 76/100 over 1169 records in the last 180 days details
Impacted products
Vendor Product Version
Apache Software Foundation Apache Kafka Affected: 2.8.0 , < 4.2.2 (semver)
Affected: 4.3.0 , < 4.3.2 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2026-79643 (GCVE-0-2026-79643)

Vulnerability from cvelistv5 – Published: 2026-09-07 15:41 – Updated: 2026-09-08 12:52
VLAI
Summary
Dell SCG 5.0 Appliance versions prior to 5.36.00.16 and Dell SCG 5.0 Application versions prior to 5.36.00.00, contains an Use of Incorrect Operator vulnerability. An unauthenticated attacker with remote access could potentially exploit this vulnerability, leading to unauthorized access.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 12:51 UTC
CWE
  • CWE-480 - Use of Incorrect Operator
Assigner
dell CNA under the mitre root
CNA scorecard C 70/100 over 520 records in the last 180 days details
References
Impacted products
Vendor Product Version
Dell Secure Connect Gateway 5.0 - Application Affected: 0 , < 5.36.00.00 or later (semver)
Create a notification for this product.
Dell Secure Connect Gateway 5.0 - Appliance Affected: 0 , < 5.36.00.16 or later (semver)
Create a notification for this product.
Date Public
2026-08-31 06:30
Show details on NVD website

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CVE-2026-63421 (GCVE-0-2026-63421)

Vulnerability from cvelistv5 – Published: 2026-08-21 20:15 – Updated: 2026-08-26 17:39
VLAI
Title
Keystone: `graphql.maxTake` bypass with negative `take`
Summary
Keystone is a content management system for Node.js. Prior to 6.5.3, the findMany resolver in packages/core/src/lib/core/queries/resolvers.ts compares the signed take argument directly with graphql.maxTake, allowing a remote unauthenticated GraphQL client to provide a negative take value whose magnitude exceeds the configured bound. The bypass also applies to relationship queries and can return more records than the developer intended, potentially exhausting service resources. This issue is fixed in version 6.5.3.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-26 17:39 UTC
CWE
  • CWE-20 - Improper Input Validation
  • CWE-480 - Use of Incorrect Operator
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7895 records in the last 180 days details
Impacted products
Vendor Product Version
keystonejs keystone Affected: < 6.5.3
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Show details on NVD website

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CVE-2026-48497 (GCVE-0-2026-48497)

Vulnerability from cvelistv5 – Published: 2026-06-26 17:32 – Updated: 2026-06-26 18:32
VLAI
Title
Envoy: Abnormal process termination in DNS UDP filter
Summary
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.35.11, 1.36.7, 1.37.3, and 1.38.1, in cases where UDP DNS filter is configured with local resolution containing a name with the length of 255 octets or remote resolution for a name of 255 octets long can complete successfully, a query with such name will result in abnormal process termination. The abnormal process termination is triggered by an invalid runtime precondition that the query name is strictly less than 255 octets, contradicting DNS specification rfc1035#section-2.3.4 that the name can be 255 or less octets. This vulnerability is fixed in 1.35.11, 1.36.7, 1.37.3, and 1.38.1.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-26 18:32 UTC
CWE
  • CWE-480 - Use of Incorrect Operator
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7895 records in the last 180 days details
References
Impacted products
Vendor Product Version
envoyproxy envoy Affected: >= 1.38.0, < 1.38.1
Affected: >= 1.37.0, < 1.37.3
Affected: >= 1.36.0, < 1.36.7
Affected: < 1.35.11
Create a notification for this product.
Show details on NVD website

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CVE-2026-44722 (GCVE-0-2026-44722)

Vulnerability from cvelistv5 – Published: 2026-07-17 16:42 – Updated: 2026-07-17 17:25
VLAI
Title
pyzipper: Encryption bypass for small files encrypted with pyzipper
Summary
pyzipper is a replacement for Python's zipfile that can read and write AES encrypted zip files. Prior to 0.4.0, a Python operator precedence bug in pyzipper/zipfile_aes.py caused the AE-2 format to never be automatically selected during encryption, causing encrypted entries to be written in AE-1 format and exposing the plaintext CRC32 checksum in the ZIP header and, for unseekable zip archives, in the datadescripter section, allowing an attacker who possesses the archive to brute-force candidate plaintexts for small or low-entropy files by comparing CRC32 values. This issue is fixed in version 0.4.0.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-17 17:25 UTC
CWE
  • CWE-480 - Use of Incorrect Operator
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7895 records in the last 180 days details
Impacted products
Vendor Product Version
danifus pyzipper Affected: < 0.4.0
Create a notification for this product.
Show details on NVD website

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CVE-2026-15043 (GCVE-0-2026-15043)

Vulnerability from cvelistv5 – Published: 2026-07-14 09:44 – Updated: 2026-07-14 15:32
VLAI
Title
DBI::SQL::Nano versions from 1.42 before 1.651 for Perl have inverted <= and >= SQL operators on text
Summary
DBI::SQL::Nano versions from 1.42 before 1.651 for Perl have inverted <= and >= SQL operators on text. DBI::SQL::Nano, DBI's built-in mini-SQL engine, evaluated WHERE predicates incorrectly in some cases. In the non-numeric string branch of the is_matched method, <= was evaluated using Perl's ge operator, and >= was evaluated using Perl's le operator. SQL::Nano is the fallback query engine for DBI's file-backed drivers (DBD::File, DBD::DBM, CSV-style drivers) whenever SQL::Statement is not installed, and is forced whenever DBI_SQL_NANO=1. Queries over such tables use these predicates directly. The impact depends on the context. Where an application relies on a WHERE clause to filter file-backed data for policy or authorization, an inverted <=/>= comparison silently returns the wrong rows.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-14 14:14 UTC
CWE
  • CWE-480 - Use of Incorrect Operator
Assigner
CPANSec CNA under the redhat root
CNA scorecard C 61/100 over 361 records in the last 180 days details
Impacted products
Vendor Product Version
HMBRAND DBI::SQL::Nano Affected: 1.42 , < 1.651 (custom)
Create a notification for this product.
Show details on NVD website

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CVE-2026-4748 (GCVE-0-2026-4748)

Vulnerability from cvelistv5 – Published: 2026-04-01 06:18 – Updated: 2026-04-01 14:56
VLAI
Title
pf silently ignores certain rules
Summary
A regression in the way hashes were calculated caused rules containing the address range syntax (x.x.x.x - y.y.y.y) that only differ in the address range(s) involved to be silently dropped as duplicates. Only the first of such rules is actually loaded into pf. Ranges expressed using the address[/mask-bits] syntax were not affected. Some keywords representing actions taken on a packet-matching rule, such as 'log', 'return tll', or 'dnpipe', may suffer from the same issue. It is unlikely that users have such configurations, as these rules would always be redundant. Affected rules are silently ignored, which can lead to unexpected behaviour including over- and underblocking.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-01 14:55 UTC
CWE
  • CWE-480 - Use of Incorrect Operator
  • CWE-754 - Improper Check for Unusual or Exceptional Conditions
  • CWE-1023 - Incomplete Comparison with Missing Factors
Assigner
freebsd CNA under the mitre root
CNA scorecard D 60/100 over 61 records in the last 180 days details
References
Impacted products
Vendor Product Version
FreeBSD FreeBSD Affected: 15.0-RELEASE , < p5 (release)
Affected: 14.4-RELEASE , < p1 (release)
Affected: 14.3-RELEASE , < p10 (release)
Create a notification for this product.
Date Public
2026-03-26 05:00
Show details on NVD website

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CVE-2025-52985 (GCVE-0-2025-52985)

Vulnerability from cvelistv5 – Published: 2025-07-11 15:09 – Updated: 2025-07-18 07:16
VLAI
Title
Junos OS Evolved: When a control-plane firewall filter refers to a prefix-list with more than 10 entries it's not matching
Summary
A Use of Incorrect Operator vulnerability in the Routing Engine firewall of Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to bypass security restrictions. When a firewall filter which is applied to the lo0 or re:mgmt interface references a prefix list with 'from prefix-list', and that prefix list contains more than 10 entries, the prefix list doesn't match and packets destined to or from the local device are not filtered. This issue affects firewall filters applied to the re:mgmt interfaces as input and output, but only affects firewall filters applied to the lo0 interface as output. This issue is applicable to IPv4 and IPv6 as a prefix list can contain IPv4 and IPv6 prefixes. This issue affects Junos OS Evolved: * 23.2R2-S3-EVO versions before 23.2R2-S4-EVO, * 23.4R2-S3-EVO versions before 23.4R2-S5-EVO, * 24.2R2-EVO versions before 24.2R2-S1-EVO, * 24.4-EVO versions before 24.4R1-S3-EVO, 24.4R2-EVO. This issue doesn't affect Junos OS Evolved versions before 23.2R1-EVO.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-07-11 16:04 UTC
CWE
  • CWE-480 - Use of Incorrect Operator
Assigner
juniper CNA under the mitre root
CNA scorecard B 84/100 over 193 records in the last 180 days details
References
Impacted products
Vendor Product Version
Juniper Networks Junos OS Evolved Affected: 23.2R2-S3-EVO , < 23.2R2-S4-EVO (semver)
Affected: 23.4R2-S3-EVO , < 23.4R2-S5-EVO (semver)
Affected: 24.2R2-EVO , < 24.2R2-S1-EVO (semver)
Affected: 24.4-EVO , < 24.4R1-S3-EVO, 24.4R2-EVO (semver)
Create a notification for this product.
Date Public
2025-07-09 16:00
Show details on NVD website

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CVE-2024-35190 (GCVE-0-2024-35190)

Vulnerability from cvelistv5 – Published: 2024-05-17 16:55 – Updated: 2024-08-02 03:07
VLAI
Title
Asterisk' res_pjsip_endpoint_identifier_ip: wrongly matches ALL unauthorized SIP requests
Summary
Asterisk is an open source private branch exchange and telephony toolkit. After upgrade to 18.23.0, ALL unauthorized SIP requests are identified as PJSIP Endpoint of local asterisk server. This vulnerability is fixed in 18.23.1, 20.8.1, and 21.3.1.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-05-17 19:33 UTC
CWE
  • CWE-303 - Incorrect Implementation of Authentication Algorithm
  • CWE-480 - Use of Incorrect Operator
  • CWE-670 - Always-Incorrect Control Flow Implementation
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7895 records in the last 180 days details
Impacted products
Vendor Product Version
asterisk asterisk Affected: = 21.3.0
Affected: = 20.8.0
Affected: = 18.23.0
Create a notification for this product.
asterisk asterisk Affected: 21.3.0
    cpe:2.3:a:asterisk:asterisk:21.3.0:*:*:*:*:*:*:*
Create a notification for this product.
asterisk asterisk Affected: 20.8.0
    cpe:2.3:a:asterisk:asterisk:20.8.0:*:*:*:*:*:*:*
Create a notification for this product.
asterisk asterisk Affected: 18.23.0
    cpe:2.3:a:asterisk:asterisk:18.23.0:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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        ],
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-35190",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
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                ],
                "role": "CISA Coordinator",
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        "discovery": "UNKNOWN"
      },
      "title": "Asterisk\u0027 res_pjsip_endpoint_identifier_ip: wrongly matches ALL unauthorized SIP requests"
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  "cveMetadata": {
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    "dateReserved": "2024-05-10T14:24:24.341Z",
    "dateUpdated": "2024-08-02T03:07:46.821Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

No mitigation information available for this CWE.

No CAPEC attack patterns related to this CWE.