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    6 vulnerabilities by path-to-regexp

    CVE-2026-4926 (GCVE-0-2026-4926)

    Vulnerability from nvd – Published: 2026-03-26 18:59 – Updated: 2026-07-15 00:47
    VLAI
    Title
    path-to-regexp vulnerable to Denial of Service via sequential optional groups
    Summary
    Impact: A bad regular expression is generated any time you have multiple sequential optional groups (curly brace syntax), such as `{a}{b}{c}:z`. The generated regex grows exponentially with the number of groups, causing denial of service. Patches: Fixed in version 8.4.0. Workarounds: Limit the number of sequential optional groups in route patterns. Avoid passing user-controlled input as route patterns.
    Severity
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-400 - Uncontrolled Resource Consumption
    • CWE-1333 - Inefficient Regular Expression Complexity
    Assigner
    References
    Impacted products
    Vendor Product Version
    path-to-regexp path-to-regexp Affected: 8.0.0 , < 8.4.0 (semver)
    Unaffected: 8.4.0 (semver)
    		Create a notification for this product.
    Red Hat Cryostat 4 on RHEL 9 Unaffected: 4.2.0-9 , < * (rpm)
        cpe:/a:redhat:cryostat:4::el9
    		 Create a notification for this product.
    Red Hat Red Hat Ansible Automation Platform 2.5 for RHEL 8 Unaffected: 0:2.5.20260422-3.el8ap , < * (rpm)
        cpe:/a:redhat:ansible_automation_platform:2.5::el8
    		 Create a notification for this product.
    Red Hat Red Hat Ansible Automation Platform 2.5 for RHEL 9 Unaffected: 0:2.5.20260422-3.el9ap , < * (rpm)
        cpe:/a:redhat:ansible_automation_platform:2.5::el9
    		 Create a notification for this product.
    Red Hat Red Hat Ansible Automation Platform 2.6 for RHEL 9 Unaffected: 0:2.6.9-1.el9ap , < * (rpm)
        cpe:/a:redhat:ansible_automation_platform:2.6::el9
    		 Create a notification for this product.
    Red Hat Migration Toolkit for Virtualization 2.1 Unaffected: 1779139872 , < * (rpm)
        cpe:/a:redhat:migration_toolkit_virtualization:2.10::el9
    		 Create a notification for this product.
    Red Hat Migration Toolkit for Virtualization 2.9 Unaffected: 1778927462 , < * (rpm)
        cpe:/a:redhat:migration_toolkit_virtualization:2.9::el9
    		 Create a notification for this product.
    Red Hat Red Hat Ansible Automation Platform 2.6 Unaffected: 1777386606 , < * (rpm)
        cpe:/a:redhat:ansible_automation_platform:2.6::el9
    		 Create a notification for this product.
    Red Hat Red Hat Ansible Automation Platform 2.6 Unaffected: 1779773804 , < * (rpm)
        cpe:/a:redhat:ansible_automation_platform:2.6::el9
    		 Create a notification for this product.
    Red Hat Red Hat Developer Hub 1.8 Unaffected: 1776784286 , < * (rpm)
        cpe:/a:redhat:rhdh:1.8::el9
    		 Create a notification for this product.
    Red Hat Red Hat Developer Hub 1.9 Unaffected: 1777903262 , < * (rpm)
        cpe:/a:redhat:rhdh:1.9::el9
    		 Create a notification for this product.
    Red Hat Red Hat Edge Manager 1.0 Unaffected: 1783502765 , < * (rpm)
        cpe:/a:redhat:edge_manager:1.0::el9
    		 Create a notification for this product.
    Red Hat Red Hat Edge Manager 1.0 Unaffected: 1783502438 , < * (rpm)
        cpe:/a:redhat:edge_manager:1.0::el9
    		 Create a notification for this product.
    Red Hat Red Hat OpenShift Dev Spaces 3.27 Unaffected: 1776744110 , < * (rpm)
        cpe:/a:redhat:openshift_devspaces:3.27::el9
    		 Create a notification for this product.
    Red Hat Red Hat OpenShift Dev Spaces 3.27 Unaffected: 1776795400 , < * (rpm)
        cpe:/a:redhat:openshift_devspaces:3.27::el9
    		 Create a notification for this product.
    Red Hat Red Hat OpenShift distributed tracing 3.9.3 Unaffected: 1776435608 , < * (rpm)
        cpe:/a:redhat:openshift_distributed_tracing:3.9::el9
    		 Create a notification for this product.
    Red Hat Red Hat Trusted Artifact Signer 1.3 Unaffected: 1776673130 , < * (rpm)
    Unaffected: 1776889929 , < * (rpm)
        cpe:/a:redhat:trusted_artifact_signer:1.3::el9
    		 Create a notification for this product.
    Red Hat Cryostat 4     cpe:/a:redhat:cryostat:4
    		 Create a notification for this product.
    Red Hat Logging Subsystem for Red Hat OpenShift     cpe:/a:redhat:logging:5
    		 Create a notification for this product.
    Red Hat Migration Toolkit for Applications 8     cpe:/a:redhat:migration_toolkit_applications:8
    		 Create a notification for this product.
    Red Hat Multicluster Engine for Kubernetes     cpe:/a:redhat:multicluster_engine
    		 Create a notification for this product.
    Red Hat Network Observability Operator     cpe:/a:redhat:network_observ_optr:1
    		 Create a notification for this product.
    Red Hat OpenShift Lightspeed     cpe:/a:redhat:openshift_lightspeed
    		 Create a notification for this product.
    Red Hat OpenShift Pipelines     cpe:/a:redhat:openshift_pipelines:1
    		 Create a notification for this product.
    Red Hat OpenShift Service Mesh 2     cpe:/a:redhat:service_mesh:2
    		 Create a notification for this product.
    Red Hat OpenShift Service Mesh 3     cpe:/a:redhat:service_mesh:3
    		 Create a notification for this product.
    Red Hat Red Hat Advanced Cluster Management for Kubernetes 2     cpe:/a:redhat:acm:2
    		 Create a notification for this product.
    Red Hat Red Hat Advanced Cluster Security 4     cpe:/a:redhat:advanced_cluster_security:4
    		 Create a notification for this product.
    Red Hat Red Hat AMQ Broker 7     cpe:/a:redhat:amq_broker:7
    		 Create a notification for this product.
    Red Hat Red Hat Ansible Automation Platform 2     cpe:/a:redhat:ansible_automation_platform:2
    		 Create a notification for this product.
    Red Hat Red Hat build of Apache Camel - HawtIO 4     cpe:/a:redhat:apache_camel_hawtio:4
    		 Create a notification for this product.
    Red Hat Red Hat build of Apicurio Registry 2     cpe:/a:redhat:service_registry:2
    		 Create a notification for this product.
    Red Hat Red Hat Build of Podman Desktop     cpe:/a:redhat:podman_desktop:1
    		 Create a notification for this product.
    Red Hat Red Hat Data Grid 8     cpe:/a:redhat:jboss_data_grid:8
    		 Create a notification for this product.
    Red Hat Red Hat Developer Hub     cpe:/a:redhat:rhdh:1
    		 Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 10     cpe:/o:redhat:enterprise_linux:10
    		 Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 8     cpe:/o:redhat:enterprise_linux:8
    		 Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 9     cpe:/o:redhat:enterprise_linux:9
    		 Create a notification for this product.
    Red Hat Red Hat Fuse 7     cpe:/a:redhat:jboss_fuse:7
    		 Create a notification for this product.
    Red Hat Red Hat JBoss Enterprise Application Platform 7     cpe:/a:redhat:jboss_enterprise_application_platform:7
    		 Create a notification for this product.
    Red Hat Red Hat JBoss Enterprise Application Platform 8     cpe:/a:redhat:jboss_enterprise_application_platform:8
    		 Create a notification for this product.
    Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack     cpe:/a:redhat:jbosseapxp
    		 Create a notification for this product.
    Red Hat Red Hat OpenShift AI (RHOAI)     cpe:/a:redhat:openshift_ai
    		 Create a notification for this product.
    Red Hat Red Hat OpenShift Container Platform 4     cpe:/a:redhat:openshift:4
    		 Create a notification for this product.
    Red Hat Red Hat Openshift Data Foundation 4     cpe:/a:redhat:openshift_data_foundation:4
    		 Create a notification for this product.
    Red Hat Red Hat OpenShift GitOps     cpe:/a:redhat:openshift_gitops:1
    		 Create a notification for this product.
    Red Hat Red Hat OpenShift Virtualization 4     cpe:/a:redhat:container_native_virtualization:4
    		 Create a notification for this product.
    Red Hat Red Hat Process Automation 7     cpe:/a:redhat:jboss_enterprise_bpms_platform:7
    		 Create a notification for this product.
    Red Hat Red Hat Quay 3     cpe:/a:redhat:quay:3
    		 Create a notification for this product.
    Red Hat Red Hat Satellite 6     cpe:/a:redhat:satellite:6
    		 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.
    Red Hat Red Hat Trusted Profile Analyzer     cpe:/a:redhat:trusted_profile_analyzer:2
    		 Create a notification for this product.
    Red Hat Self-service automation portal 2     cpe:/a:redhat:ansible_portal:2
    		 Create a notification for this product.
    Credits
    uug4na blakeembrey UlisesGascon
    Show details on NVD website
    To clipboard 

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    CVE-2026-4923 (GCVE-0-2026-4923)

    Vulnerability from nvd – Published: 2026-03-26 19:02 – Updated: 2026-03-27 13:58
    VLAI
    Title
    path-to-regexp vulnerable to Regular Expression Denial of Service via multiple wildcards
    Summary
    Impact: When using multiple wildcards, combined with at least one parameter, a regular expression can be generated that is vulnerable to ReDoS. This backtracking vulnerability requires the second wildcard to be somewhere other than the end of the path. Unsafe examples: /*foo-*bar-:baz /*a-:b-*c-:d /x/*a-:b/*c/y Safe examples: /*foo-:bar /*foo-:bar-*baz Patches: Upgrade to version 8.4.0. Workarounds: If you are using multiple wildcard parameters, you can check the regex output with a tool such as https://makenowjust-labs.github.io/recheck/playground/ to confirm whether a path is vulnerable.
    Severity
    5.9 (Medium)
    CVSS:3.1/AV:N/AC:H/PR:N/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-1333 - Inefficient Regular Expression Complexity
    Assigner
    References
    Impacted products
    Vendor Product Version
    path-to-regexp path-to-regexp Affected: 8.0.0 , < 8.4.0 (semver)
    Unaffected: 8.4.0 (semver)
    		Create a notification for this product.
    Credits
    blakeembrey UlisesGascon
    Show details on NVD website
    To clipboard 

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    CVE-2026-4867 (GCVE-0-2026-4867)

    Vulnerability from nvd – Published: 2026-03-26 16:16 – Updated: 2026-03-26 16:52
    VLAI
    Title
    path-to-regexp vulnerable to Regular Expression Denial of Service via multiple route parameters
    Summary
    Impact: A bad regular expression is generated any time you have three or more parameters within a single segment, separated by something that is not a period (.). For example, /:a-:b-:c or /:a-:b-:c-:d. The backtrack protection added in path-to-regexp@0.1.12 only prevents ambiguity for two parameters. With three or more, the generated lookahead does not block single separator characters, so capture groups overlap and cause catastrophic backtracking. Patches: Upgrade to path-to-regexp@0.1.13 Custom regex patterns in route definitions (e.g., /:a-:b([^-/]+)-:c([^-/]+)) are not affected because they override the default capture group. Workarounds: All versions can be patched by providing a custom regular expression for parameters after the first in a single segment. As long as the custom regular expression does not match the text before the parameter, you will be safe. For example, change /:a-:b-:c to /:a-:b([^-/]+)-:c([^-/]+). If paths cannot be rewritten and versions cannot be upgraded, another alternative is to limit the URL length.
    Severity
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-1333 - Inefficient Regular Expression Complexity
    Assigner
    References
    Impacted products
    Vendor Product Version
    path-to-regexp path-to-regexp Affected: 0 , < 0.1.13 (semver)
    		Create a notification for this product.
    Credits
    EthanKim88 blakeembrey UlisesGascon
    Show details on NVD website
    To clipboard 

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    CVE-2026-4923 (GCVE-0-2026-4923)

    Vulnerability from cvelistv5 – Published: 2026-03-26 19:02 – Updated: 2026-03-27 13:58
    VLAI
    Title
    path-to-regexp vulnerable to Regular Expression Denial of Service via multiple wildcards
    Summary
    Impact: When using multiple wildcards, combined with at least one parameter, a regular expression can be generated that is vulnerable to ReDoS. This backtracking vulnerability requires the second wildcard to be somewhere other than the end of the path. Unsafe examples: /*foo-*bar-:baz /*a-:b-*c-:d /x/*a-:b/*c/y Safe examples: /*foo-:bar /*foo-:bar-*baz Patches: Upgrade to version 8.4.0. Workarounds: If you are using multiple wildcard parameters, you can check the regex output with a tool such as https://makenowjust-labs.github.io/recheck/playground/ to confirm whether a path is vulnerable.
    Severity
    5.9 (Medium)
    CVSS:3.1/AV:N/AC:H/PR:N/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-1333 - Inefficient Regular Expression Complexity
    Assigner
    References
    Impacted products
    Vendor Product Version
    path-to-regexp path-to-regexp Affected: 8.0.0 , < 8.4.0 (semver)
    Unaffected: 8.4.0 (semver)
    		Create a notification for this product.
    Credits
    blakeembrey UlisesGascon
    Show details on NVD website
    To clipboard 

    {
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    CVE-2026-4926 (GCVE-0-2026-4926)

    Vulnerability from cvelistv5 – Published: 2026-03-26 18:59 – Updated: 2026-07-15 00:47
    VLAI
    Title
    path-to-regexp vulnerable to Denial of Service via sequential optional groups
    Summary
    Impact: A bad regular expression is generated any time you have multiple sequential optional groups (curly brace syntax), such as `{a}{b}{c}:z`. The generated regex grows exponentially with the number of groups, causing denial of service. Patches: Fixed in version 8.4.0. Workarounds: Limit the number of sequential optional groups in route patterns. Avoid passing user-controlled input as route patterns.
    Severity
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-400 - Uncontrolled Resource Consumption
    • CWE-1333 - Inefficient Regular Expression Complexity
    Assigner
    References
    Impacted products
    Vendor Product Version
    path-to-regexp path-to-regexp Affected: 8.0.0 , < 8.4.0 (semver)
    Unaffected: 8.4.0 (semver)
    		Create a notification for this product.
    Red Hat Cryostat 4 on RHEL 9 Unaffected: 4.2.0-9 , < * (rpm)
        cpe:/a:redhat:cryostat:4::el9
    		 Create a notification for this product.
    Red Hat Red Hat Ansible Automation Platform 2.5 for RHEL 8 Unaffected: 0:2.5.20260422-3.el8ap , < * (rpm)
        cpe:/a:redhat:ansible_automation_platform:2.5::el8
    		 Create a notification for this product.
    Red Hat Red Hat Ansible Automation Platform 2.5 for RHEL 9 Unaffected: 0:2.5.20260422-3.el9ap , < * (rpm)
        cpe:/a:redhat:ansible_automation_platform:2.5::el9
    		 Create a notification for this product.
    Red Hat Red Hat Ansible Automation Platform 2.6 for RHEL 9 Unaffected: 0:2.6.9-1.el9ap , < * (rpm)
        cpe:/a:redhat:ansible_automation_platform:2.6::el9
    		 Create a notification for this product.
    Red Hat Migration Toolkit for Virtualization 2.1 Unaffected: 1779139872 , < * (rpm)
        cpe:/a:redhat:migration_toolkit_virtualization:2.10::el9
    		 Create a notification for this product.
    Red Hat Migration Toolkit for Virtualization 2.9 Unaffected: 1778927462 , < * (rpm)
        cpe:/a:redhat:migration_toolkit_virtualization:2.9::el9
    		 Create a notification for this product.
    Red Hat Red Hat Ansible Automation Platform 2.6 Unaffected: 1777386606 , < * (rpm)
        cpe:/a:redhat:ansible_automation_platform:2.6::el9
    		 Create a notification for this product.
    Red Hat Red Hat Ansible Automation Platform 2.6 Unaffected: 1779773804 , < * (rpm)
        cpe:/a:redhat:ansible_automation_platform:2.6::el9
    		 Create a notification for this product.
    Red Hat Red Hat Developer Hub 1.8 Unaffected: 1776784286 , < * (rpm)
        cpe:/a:redhat:rhdh:1.8::el9
    		 Create a notification for this product.
    Red Hat Red Hat Developer Hub 1.9 Unaffected: 1777903262 , < * (rpm)
        cpe:/a:redhat:rhdh:1.9::el9
    		 Create a notification for this product.
    Red Hat Red Hat Edge Manager 1.0 Unaffected: 1783502765 , < * (rpm)
        cpe:/a:redhat:edge_manager:1.0::el9
    		 Create a notification for this product.
    Red Hat Red Hat Edge Manager 1.0 Unaffected: 1783502438 , < * (rpm)
        cpe:/a:redhat:edge_manager:1.0::el9
    		 Create a notification for this product.
    Red Hat Red Hat OpenShift Dev Spaces 3.27 Unaffected: 1776744110 , < * (rpm)
        cpe:/a:redhat:openshift_devspaces:3.27::el9
    		 Create a notification for this product.
    Red Hat Red Hat OpenShift Dev Spaces 3.27 Unaffected: 1776795400 , < * (rpm)
        cpe:/a:redhat:openshift_devspaces:3.27::el9
    		 Create a notification for this product.
    Red Hat Red Hat OpenShift distributed tracing 3.9.3 Unaffected: 1776435608 , < * (rpm)
        cpe:/a:redhat:openshift_distributed_tracing:3.9::el9
    		 Create a notification for this product.
    Red Hat Red Hat Trusted Artifact Signer 1.3 Unaffected: 1776673130 , < * (rpm)
    Unaffected: 1776889929 , < * (rpm)
        cpe:/a:redhat:trusted_artifact_signer:1.3::el9
    		 Create a notification for this product.
    Red Hat Cryostat 4     cpe:/a:redhat:cryostat:4
    		 Create a notification for this product.
    Red Hat Logging Subsystem for Red Hat OpenShift     cpe:/a:redhat:logging:5
    		 Create a notification for this product.
    Red Hat Migration Toolkit for Applications 8     cpe:/a:redhat:migration_toolkit_applications:8
    		 Create a notification for this product.
    Red Hat Multicluster Engine for Kubernetes     cpe:/a:redhat:multicluster_engine
    		 Create a notification for this product.
    Red Hat Network Observability Operator     cpe:/a:redhat:network_observ_optr:1
    		 Create a notification for this product.
    Red Hat OpenShift Lightspeed     cpe:/a:redhat:openshift_lightspeed
    		 Create a notification for this product.
    Red Hat OpenShift Pipelines     cpe:/a:redhat:openshift_pipelines:1
    		 Create a notification for this product.
    Red Hat OpenShift Service Mesh 2     cpe:/a:redhat:service_mesh:2
    		 Create a notification for this product.
    Red Hat OpenShift Service Mesh 3     cpe:/a:redhat:service_mesh:3
    		 Create a notification for this product.
    Red Hat Red Hat Advanced Cluster Management for Kubernetes 2     cpe:/a:redhat:acm:2
    		 Create a notification for this product.
    Red Hat Red Hat Advanced Cluster Security 4     cpe:/a:redhat:advanced_cluster_security:4
    		 Create a notification for this product.
    Red Hat Red Hat AMQ Broker 7     cpe:/a:redhat:amq_broker:7
    		 Create a notification for this product.
    Red Hat Red Hat Ansible Automation Platform 2     cpe:/a:redhat:ansible_automation_platform:2
    		 Create a notification for this product.
    Red Hat Red Hat build of Apache Camel - HawtIO 4     cpe:/a:redhat:apache_camel_hawtio:4
    		 Create a notification for this product.
    Red Hat Red Hat build of Apicurio Registry 2     cpe:/a:redhat:service_registry:2
    		 Create a notification for this product.
    Red Hat Red Hat Build of Podman Desktop     cpe:/a:redhat:podman_desktop:1
    		 Create a notification for this product.
    Red Hat Red Hat Data Grid 8     cpe:/a:redhat:jboss_data_grid:8
    		 Create a notification for this product.
    Red Hat Red Hat Developer Hub     cpe:/a:redhat:rhdh:1
    		 Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 10     cpe:/o:redhat:enterprise_linux:10
    		 Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 8     cpe:/o:redhat:enterprise_linux:8
    		 Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 9     cpe:/o:redhat:enterprise_linux:9
    		 Create a notification for this product.
    Red Hat Red Hat Fuse 7     cpe:/a:redhat:jboss_fuse:7
    		 Create a notification for this product.
    Red Hat Red Hat JBoss Enterprise Application Platform 7     cpe:/a:redhat:jboss_enterprise_application_platform:7
    		 Create a notification for this product.
    Red Hat Red Hat JBoss Enterprise Application Platform 8     cpe:/a:redhat:jboss_enterprise_application_platform:8
    		 Create a notification for this product.
    Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack     cpe:/a:redhat:jbosseapxp
    		 Create a notification for this product.
    Red Hat Red Hat OpenShift AI (RHOAI)     cpe:/a:redhat:openshift_ai
    		 Create a notification for this product.
    Red Hat Red Hat OpenShift Container Platform 4     cpe:/a:redhat:openshift:4
    		 Create a notification for this product.
    Red Hat Red Hat Openshift Data Foundation 4     cpe:/a:redhat:openshift_data_foundation:4
    		 Create a notification for this product.
    Red Hat Red Hat OpenShift GitOps     cpe:/a:redhat:openshift_gitops:1
    		 Create a notification for this product.
    Red Hat Red Hat OpenShift Virtualization 4     cpe:/a:redhat:container_native_virtualization:4
    		 Create a notification for this product.
    Red Hat Red Hat Process Automation 7     cpe:/a:redhat:jboss_enterprise_bpms_platform:7
    		 Create a notification for this product.
    Red Hat Red Hat Quay 3     cpe:/a:redhat:quay:3
    		 Create a notification for this product.
    Red Hat Red Hat Satellite 6     cpe:/a:redhat:satellite:6
    		 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.
    Red Hat Red Hat Trusted Profile Analyzer     cpe:/a:redhat:trusted_profile_analyzer:2
    		 Create a notification for this product.
    Red Hat Self-service automation portal 2     cpe:/a:redhat:ansible_portal:2
    		 Create a notification for this product.
    Credits
    uug4na blakeembrey UlisesGascon
    Show details on NVD website
    To clipboard 

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    CVE-2026-4867 (GCVE-0-2026-4867)

    Vulnerability from cvelistv5 – Published: 2026-03-26 16:16 – Updated: 2026-03-26 16:52
    VLAI
    Title
    path-to-regexp vulnerable to Regular Expression Denial of Service via multiple route parameters
    Summary
    Impact: A bad regular expression is generated any time you have three or more parameters within a single segment, separated by something that is not a period (.). For example, /:a-:b-:c or /:a-:b-:c-:d. The backtrack protection added in path-to-regexp@0.1.12 only prevents ambiguity for two parameters. With three or more, the generated lookahead does not block single separator characters, so capture groups overlap and cause catastrophic backtracking. Patches: Upgrade to path-to-regexp@0.1.13 Custom regex patterns in route definitions (e.g., /:a-:b([^-/]+)-:c([^-/]+)) are not affected because they override the default capture group. Workarounds: All versions can be patched by providing a custom regular expression for parameters after the first in a single segment. As long as the custom regular expression does not match the text before the parameter, you will be safe. For example, change /:a-:b-:c to /:a-:b([^-/]+)-:c([^-/]+). If paths cannot be rewritten and versions cannot be upgraded, another alternative is to limit the URL length.
    Severity
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-1333 - Inefficient Regular Expression Complexity
    Assigner
    References
    Impacted products
    Vendor Product Version
    path-to-regexp path-to-regexp Affected: 0 , < 0.1.13 (semver)
    		Create a notification for this product.
    Credits
    EthanKim88 blakeembrey UlisesGascon
    Show details on NVD website
    To clipboard 

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