CVE-2026-4926 (GCVE-0-2026-4926)
Vulnerability from cvelistv5 – Published: 2026-03-26 18:59 – Updated: 2026-09-17 12:04
VLAI
EPSS
VEX
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)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-27 19:44 UTC
CWE
Assigner
References
22 references
Impacted products
58 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| path-to-regexp | path-to-regexp |
Affected:
8.0.0 , < 8.4.0
(semver)
Unaffected: 8.4.0 (semver) |
guessed | |
| Red Hat | Cryostat 4 on RHEL 9 |
Unaffected:
4.2.0-9 , < *
(rpm)
cpe:/a:redhat:cryostat:4::el9 |
||
| 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 |
||
| 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 |
||
| 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 |
||
| Red Hat | Migration Toolkit for Virtualization 2.1 |
Unaffected:
1779139872 , < *
(rpm)
cpe:/a:redhat:migration_toolkit_virtualization:2.10::el9 |
||
| Red Hat | Migration Toolkit for Virtualization 2.9 |
Unaffected:
1778927462 , < *
(rpm)
cpe:/a:redhat:migration_toolkit_virtualization:2.9::el9 |
||
| Red Hat | Red Hat Ansible Automation Platform 2.6 |
Unaffected:
1777386606 , < *
(rpm)
cpe:/a:redhat:ansible_automation_platform:2.6::el9 |
||
| Red Hat | Red Hat Ansible Automation Platform 2.6 |
Unaffected:
1779773804 , < *
(rpm)
cpe:/a:redhat:ansible_automation_platform:2.6::el9 |
||
| Red Hat | Red Hat Developer Hub 1.8 |
Unaffected:
1776784286 , < *
(rpm)
cpe:/a:redhat:rhdh:1.8::el9 |
||
| Red Hat | Red Hat Developer Hub 1.9 |
Unaffected:
1777903262 , < *
(rpm)
cpe:/a:redhat:rhdh:1.9::el9 |
||
| Red Hat | Red Hat Edge Manager 1.0 |
Unaffected:
1783502765 , < *
(rpm)
cpe:/a:redhat:edge_manager:1.0::el9 |
||
| Red Hat | Red Hat Edge Manager 1.0 |
Unaffected:
1783502438 , < *
(rpm)
cpe:/a:redhat:edge_manager:1.0::el9 |
||
| Red Hat | Red Hat Edge Manager 1.1 |
Unaffected:
1784194938 , < *
(rpm)
cpe:/a:redhat:edge_manager:1.1::el10 |
||
| Red Hat | Red Hat Edge Manager 1.1 |
Unaffected:
1784194574 , < *
(rpm)
cpe:/a:redhat:edge_manager:1.1::el10 |
||
| Red Hat | Red Hat Edge Manager 1.1 |
Unaffected:
1784126822 , < *
(rpm)
cpe:/a:redhat:edge_manager:1.1::el9 |
||
| Red Hat | Red Hat Edge Manager 1.1 |
Unaffected:
1784127736 , < *
(rpm)
cpe:/a:redhat:edge_manager:1.1::el9 |
||
| Red Hat | Red Hat Migration Toolkit for Applications 8.1 |
Unaffected:
1785169013 , < *
(rpm)
cpe:/a:redhat:migration_toolkit_applications:8.1::el9 |
||
| Red Hat | Red Hat OpenShift AI 2.25 |
Unaffected:
1787801527 , < *
(rpm)
cpe:/a:redhat:openshift_ai:2.25::el9 |
||
| Red Hat | Red Hat OpenShift Dev Spaces 3.27 |
Unaffected:
1776744110 , < *
(rpm)
cpe:/a:redhat:openshift_devspaces:3.27::el9 |
||
| Red Hat | Red Hat OpenShift Dev Spaces 3.27 |
Unaffected:
1776795400 , < *
(rpm)
cpe:/a:redhat:openshift_devspaces:3.27::el9 |
||
| Red Hat | Red Hat OpenShift distributed tracing 3.9.3 |
Unaffected:
1776435608 , < *
(rpm)
cpe:/a:redhat:openshift_distributed_tracing:3.9::el9 |
||
| Red Hat | Red Hat Trusted Artifact Signer 1.3 |
Unaffected:
1776673130 , < *
(rpm)
Unaffected: 1776889929 , < * (rpm) cpe:/a:redhat:trusted_artifact_signer:1.3::el9 |
||
| Red Hat | Cryostat 4 |
cpe:/a:redhat:cryostat:4
|
||
| Red Hat | Logging Subsystem for Red Hat OpenShift |
cpe:/a:redhat:logging:5
|
||
| Red Hat | Multicluster Engine for Kubernetes |
cpe:/a:redhat:multicluster_engine
|
||
| Red Hat | Network Observability Operator |
cpe:/a:redhat:network_observ_optr:1
|
||
| Red Hat | OpenShift Lightspeed |
cpe:/a:redhat:openshift_lightspeed
|
||
| Red Hat | OpenShift Pipelines |
cpe:/a:redhat:openshift_pipelines:1
|
||
| Red Hat | OpenShift Service Mesh 2 |
cpe:/a:redhat:service_mesh:2
|
||
| Red Hat | OpenShift Service Mesh 3 |
cpe:/a:redhat:service_mesh:3
|
||
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2 |
cpe:/a:redhat:acm:2
|
||
| Red Hat | Red Hat Advanced Cluster Security 4 |
cpe:/a:redhat:advanced_cluster_security:4
|
||
| Red Hat | Red Hat AMQ Broker 7 |
cpe:/a:redhat:amq_broker:7
|
||
| Red Hat | Red Hat Ansible Automation Platform 2 |
cpe:/a:redhat:ansible_automation_platform:2
|
||
| Red Hat | Red Hat build of Apache Camel - HawtIO 4 |
cpe:/a:redhat:apache_camel_hawtio:4
|
||
| Red Hat | Red Hat build of Apicurio Registry 2 |
cpe:/a:redhat:service_registry:2
|
||
| Red Hat | Red Hat Build of Podman Desktop |
cpe:/a:redhat:podman_desktop:1
|
||
| Red Hat | Red Hat Data Grid 8 |
cpe:/a:redhat:jboss_data_grid:8
|
||
| Red Hat | Red Hat Developer Hub |
cpe:/a:redhat:rhdh:1
|
||
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10
|
||
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8
|
||
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9
|
||
| Red Hat | Red Hat Fuse 7 |
cpe:/a:redhat:jboss_fuse:7
|
||
| Red Hat | Red Hat JBoss Enterprise Application Platform 7 |
cpe:/a:redhat:jboss_enterprise_application_platform:7
|
||
| Red Hat | Red Hat JBoss Enterprise Application Platform 8 |
cpe:/a:redhat:jboss_enterprise_application_platform:8
|
||
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack |
cpe:/a:redhat:jbosseapxp
|
||
| Red Hat | Red Hat OpenShift AI (RHOAI) |
cpe:/a:redhat:openshift_ai
|
||
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4
|
||
| Red Hat | Red Hat Openshift Data Foundation 4 |
cpe:/a:redhat:openshift_data_foundation:4
|
||
| Red Hat | Red Hat OpenShift GitOps |
cpe:/a:redhat:openshift_gitops:1
|
||
| Red Hat | Red Hat OpenShift Virtualization 4 |
cpe:/a:redhat:container_native_virtualization:4
|
||
| Red Hat | Red Hat Process Automation 7 |
cpe:/a:redhat:jboss_enterprise_bpms_platform:7
|
||
| Red Hat | Red Hat Quay 3 |
cpe:/a:redhat:quay:3
|
||
| Red Hat | Red Hat Satellite 6 |
cpe:/a:redhat:satellite:6
|
||
| Red Hat | Red Hat Single Sign-On 7 |
cpe:/a:redhat:red_hat_single_sign_on:7
|
||
| Red Hat | Red Hat Trusted Profile Analyzer |
cpe:/a:redhat:trusted_profile_analyzer:2
|
||
| Red Hat | Self-service automation portal 2 |
cpe:/a:redhat:ansible_portal:2
|
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-4926",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-03-27T19:44:44.790485Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-03-27T19:44:53.294Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
},
{
"affected": [
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"cpes": [
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],
"defaultStatus": "affected",
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"product": "Cryostat 4 on RHEL 9",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "4.2.0-9",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
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],
"defaultStatus": "affected",
"packageName": "automation-gateway",
"product": "Red Hat Ansible Automation Platform 2.5 for RHEL 8",
"vendor": "Red Hat",
"versions": [
{
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"status": "unaffected",
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]
},
{
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"cpes": [
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],
"defaultStatus": "affected",
"packageName": "automation-gateway",
"product": "Red Hat Ansible Automation Platform 2.5 for RHEL 9",
"vendor": "Red Hat",
"versions": [
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},
{
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"cpes": [
"cpe:/a:redhat:ansible_automation_platform:2.6::el9"
],
"defaultStatus": "affected",
"packageName": "automation-platform-ui",
"product": "Red Hat Ansible Automation Platform 2.6 for RHEL 9",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:2.6.9-1.el9ap",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:migration_toolkit_virtualization:2.10::el9"
],
"defaultStatus": "affected",
"packageName": "migration-toolkit-virtualization/mtv-console-plugin-rhel9",
"product": "Migration Toolkit for Virtualization 2.1",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "1779139872",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:migration_toolkit_virtualization:2.9::el9"
],
"defaultStatus": "affected",
"packageName": "migration-toolkit-virtualization/mtv-console-plugin-rhel9",
"product": "Migration Toolkit for Virtualization 2.9",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "1778927462",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:ansible_automation_platform:2.6::el9"
],
"defaultStatus": "affected",
"packageName": "ansible-automation-platform-tech-preview/mcp-server-rhel9",
"product": "Red Hat Ansible Automation Platform 2.6",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "1777386606",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:ansible_automation_platform:2.6::el9"
],
"defaultStatus": "affected",
"packageName": "ansible-automation-platform-26/gateway-rhel9",
"product": "Red Hat Ansible Automation Platform 2.6",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "1779773804",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:rhdh:1.8::el9"
],
"defaultStatus": "affected",
"packageName": "rhdh/rhdh-hub-rhel9",
"product": "Red Hat Developer Hub 1.8",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "1776784286",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:rhdh:1.9::el9"
],
"defaultStatus": "affected",
"packageName": "rhdh/rhdh-hub-rhel9",
"product": "Red Hat Developer Hub 1.9",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "1777903262",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:edge_manager:1.0::el9"
],
"defaultStatus": "affected",
"packageName": "rhem/flightctl-ui-ocp-rhel9",
"product": "Red Hat Edge Manager 1.0",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "1783502765",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:edge_manager:1.0::el9"
],
"defaultStatus": "affected",
"packageName": "rhem/flightctl-ui-rhel9",
"product": "Red Hat Edge Manager 1.0",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "1783502438",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:edge_manager:1.1::el10"
],
"defaultStatus": "affected",
"packageName": "rhem/flightctl-ui-ocp-rhel10",
"product": "Red Hat Edge Manager 1.1",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "1784194938",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:edge_manager:1.1::el10"
],
"defaultStatus": "affected",
"packageName": "rhem/flightctl-ui-rhel10",
"product": "Red Hat Edge Manager 1.1",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "1784194574",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:edge_manager:1.1::el9"
],
"defaultStatus": "affected",
"packageName": "rhem/flightctl-ui-ocp-rhel9",
"product": "Red Hat Edge Manager 1.1",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "1784126822",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:edge_manager:1.1::el9"
],
"defaultStatus": "affected",
"packageName": "rhem/flightctl-ui-rhel9",
"product": "Red Hat Edge Manager 1.1",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "1784127736",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:migration_toolkit_applications:8.1::el9"
],
"defaultStatus": "affected",
"packageName": "mta/mta-ui-rhel9",
"product": "Red Hat Migration Toolkit for Applications 8.1",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "1785169013",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:openshift_ai:2.25::el9"
],
"defaultStatus": "affected",
"packageName": "rhoai/odh-workbench-codeserver-datascience-cpu-py312-rhel9",
"product": "Red Hat OpenShift AI 2.25",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "1787801527",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:openshift_devspaces:3.27::el9"
],
"defaultStatus": "affected",
"packageName": "devspaces/code-rhel9",
"product": "Red Hat OpenShift Dev Spaces 3.27",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "1776744110",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:openshift_devspaces:3.27::el9"
],
"defaultStatus": "affected",
"packageName": "devspaces/jetbrains-ide-rhel9",
"product": "Red Hat OpenShift Dev Spaces 3.27",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "1776795400",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:openshift_distributed_tracing:3.9::el9"
],
"defaultStatus": "affected",
"packageName": "rhosdt/tempo-jaeger-query-rhel9",
"product": "Red Hat OpenShift distributed tracing 3.9.3",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "1776435608",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:trusted_artifact_signer:1.3::el9"
],
"defaultStatus": "affected",
"packageName": "rhtas/rhtas-console-ui-rhel9",
"product": "Red Hat Trusted Artifact Signer 1.3",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "1776673130",
"versionType": "rpm"
},
{
"lessThan": "*",
"status": "unaffected",
"version": "1776889929",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:cryostat:4"
],
"defaultStatus": "unaffected",
"packageName": "io.cryostat-cryostat",
"product": "Cryostat 4",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:logging:5"
],
"defaultStatus": "affected",
"packageName": "openshift-logging/elasticsearch6-rhel9",
"product": "Logging Subsystem for Red Hat OpenShift",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:logging:5"
],
"defaultStatus": "affected",
"packageName": "openshift-logging/elasticsearch-operator-bundle",
"product": "Logging Subsystem for Red Hat OpenShift",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:logging:5"
],
"defaultStatus": "affected",
"packageName": "openshift-logging/elasticsearch-proxy-rhel9",
"product": "Logging Subsystem for Red Hat OpenShift",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:logging:5"
],
"defaultStatus": "affected",
"packageName": "openshift-logging/elasticsearch-rhel9-operator",
"product": "Logging Subsystem for Red Hat OpenShift",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:logging:5"
],
"defaultStatus": "affected",
"packageName": "openshift-logging/kibana6-rhel8",
"product": "Logging Subsystem for Red Hat OpenShift",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:logging:5"
],
"defaultStatus": "affected",
"packageName": "openshift-logging/logging-curator5-rhel9",
"product": "Logging Subsystem for Red Hat OpenShift",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:multicluster_engine"
],
"defaultStatus": "affected",
"packageName": "multicluster-engine/console-mce-rhel9",
"product": "Multicluster Engine for Kubernetes",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:network_observ_optr:1"
],
"defaultStatus": "unaffected",
"packageName": "network-observability/network-observability-console-plugin-rhel9",
"product": "Network Observability Operator",
"vendor": "Red Hat"
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"packageURL": "pkg:npm/path-to-regexp",
"product": "path-to-regexp",
"vendor": "path-to-regexp",
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"version": "8.0.0",
"versionType": "semver"
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{
"status": "unaffected",
"version": "8.4.0",
"versionType": "semver"
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}
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"credits": [
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"type": "reporter",
"value": "uug4na"
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{
"lang": "en",
"type": "remediation developer",
"value": "blakeembrey"
},
{
"lang": "en",
"type": "remediation reviewer",
"value": "UlisesGascon"
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"descriptions": [
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"lang": "en",
"supportingMedia": [
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"value": "Impact:\n\nA 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.\n\nPatches:\n\nFixed in version 8.4.0.\n\nWorkarounds:\n\nLimit the number of sequential optional groups in route patterns. Avoid passing user-controlled input as route patterns."
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"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"problemTypes": [
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"descriptions": [
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"cweId": "CWE-400",
"description": "CWE-400: Uncontrolled Resource Consumption",
"lang": "en",
"type": "CWE"
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},
{
"descriptions": [
{
"cweId": "CWE-1333",
"description": "CWE-1333: Inefficient Regular Expression Complexity",
"lang": "en",
"type": "CWE"
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]
}
],
"providerMetadata": {
"dateUpdated": "2026-03-26T18:59:38.000Z",
"orgId": "ce714d77-add3-4f53-aff5-83d477b104bb",
"shortName": "openjs"
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"references": [
{
"url": "https://cna.openjsf.org/security-advisories.html"
}
],
"title": "path-to-regexp vulnerable to Denial of Service via sequential optional groups",
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},
"cveMetadata": {
"assignerOrgId": "ce714d77-add3-4f53-aff5-83d477b104bb",
"assignerShortName": "openjs",
"cveId": "CVE-2026-4926",
"datePublished": "2026-03-26T18:59:38.000Z",
"dateReserved": "2026-03-26T18:36:49.229Z",
"dateUpdated": "2026-09-17T12:04:38.293Z",
"state": "PUBLISHED"
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"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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