path-to-regexp vulnerable to Regular Expression Denial of Service via multiple wildcards
Priority LOW 26CWE-1333Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 1 fixed, 41 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-1333.
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00359 29th percentileScored 2026-11-07
Fix Partial path-to-regexp (path-to-regexp): 8.4.0path-to-regexp (npm): 8.4.0Red Hat: 1 advisoryRed Hat: 1 fixed, 41 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| multiparty | path-to-regexp | 8.0.0 to before 8.4.0 | 8.4.0 | Patch available | CNA |
| — | path-to-regexp (npm) | 8.0.0 to before 8.4.0 | 8.4.0 | Patch available | GHSA-27v5-c462-wpq7 |
- path-to-regexp Vendormultiparty Affected 8.0.0 to before 8.4.0 Fixed in 8.4.0 Patch available CNA
- path-to-regexp (npm) Vendor— Affected 8.0.0 to before 8.4.0 Fixed in 8.4.0 Patch available GHSA-27v5-c462-wpq7
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:pillarjs:path-to-regexp:*:*:*:*:*:node.js:*:* | 8.0.0 to before 8.4.0 | Vulnerable | multiparty |
- cpe:2.3:a:pillarjs:path-to-regexp:*:*:*:*:*:node.js:*:* Versions 8.0.0 to before 8.4.0 Vulnerable ·multiparty
Remediation
- Fix · CNA path-to-regexp (path-to-regexp) Fixed in 8.4.0
- Fix · GHSA-27v5-c462-wpq7 path-to-regexp (npm) Fixed in 8.4.0 Advisory →
Red Hat 1 advisory
- RHSA-2026:24841 Released 2026-06-09 · Red Hat rating ModerateRed Hat Developer Hub 1.10.0 release.
- Red Hat Developer Hub 1.10 registry.redhat.io/rhdh/rhdh-hub-rhel9
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
path-to-regexp 8.4.0
2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2026-04296 path-to-regexp vulnerable to Denial of Service via sequential optional groupsPriority MEDIUM 40
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Cryostat 4 | Affected | No fix yet: Fix deferred |
| Logging Subsystem for Red Hat OpenShift | Affected | No fix yet: Fix deferred |
| Migration Toolkit for Applications 8 | Affected | No fix yet: Fix deferred |
| Migration Toolkit for Virtualization | Affected | No fix yet: Fix deferred |
| Multicluster Engine for Kubernetes | Affected | No fix yet: Fix deferred |
| Network Observability Operator | Affected | No fix yet: Fix deferred |
| OpenShift Lightspeed | Affected | No fix yet: Fix deferred |
| OpenShift Pipelines | Affected | No fix yet: Fix deferred |
| OpenShift Service Mesh 2 | Affected | No fix yet: Fix deferred |
| OpenShift Service Mesh 3 | Affected | No fix yet: Fix deferred |
| Red Hat AMQ Broker 7 | Affected | No fix yet: Fix deferred |
| Red Hat Advanced Cluster Management for Kubernetes 2 | Affected | No fix yet: Fix deferred |
| Red Hat Advanced Cluster Security 4 | Affected | No fix yet: Fix deferred |
| Red Hat Ansible Automation Platform 2 | Affected | No fix yet: Fix deferred |
| Red Hat Build of Podman Desktop | Affected | No fix yet: Fix deferred |
| Red Hat Data Grid 8 | Affected | No fix yet: Fix deferred |
| Red Hat Developer Hub 1 | Affected | No fix yet: Fix deferred |
| Red Hat Edge Manager 1 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat Fuse 7 | Affected | No fix yet: Fix deferred |
| Red Hat JBoss Enterprise Application Platform 7 | Affected | No fix yet: Fix deferred |
| Red Hat JBoss Enterprise Application Platform 8 | Affected | No fix yet: Fix deferred |
| Red Hat JBoss Enterprise Application Platform Expansion Pack | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift AI (RHOAI) | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Dev Spaces | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift GitOps | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Virtualization 4 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift distributed tracing 3 | Affected | No fix yet: Fix deferred |
| Red Hat Openshift Data Foundation 4 | Affected | No fix yet: Fix deferred |
| Red Hat Process Automation 7 | Affected | No fix yet: Fix deferred |
| Red Hat Quay 3 | Affected | No fix yet: Fix deferred |
| Red Hat Satellite 6 | Affected | No fix yet: Fix deferred |
| Red Hat Single Sign-On 7 | Affected | No fix yet: Fix deferred |
| Red Hat Trusted Artifact Signer | Affected | No fix yet: Fix deferred |
| Red Hat Trusted Profile Analyzer | Affected | No fix yet: Fix deferred |
| Red Hat build of Apache Camel - HawtIO 4 | Affected | No fix yet: Fix deferred |
| Red Hat build of Apicurio Registry 2 | Affected | No fix yet: Fix deferred |
| Self-service automation portal 2 | Affected | No fix yet: Fix deferred |
| Red Hat Developer Hub 1.10 | Fixed | RHSA-2026:24841 |
Not affected: 1 product
- Red Hat Developer Hub 1.10
Timeline
- 2026-10-02 Threatist record created from CVE-2026-4923
- 2026-10-03 Alias added: GHSA-27v5-c462-wpq7
- 2026-10-27 Affected versions changed · Red Hat
References
More multiparty Path-to-regexp vulnerabilities
- TI-2026-04296 path-to-regexp vulnerable to Denial of Service via sequential optional groups CVSS 3.1HIGH 7.5
- TI-2026-04243 path-to-regexp vulnerable to Regular Expression Denial of Service via multiple route parameters CVSS 3.1HIGH 7.5
Sources
- CVE-2026-4923 · CVE Program
- CVE-2026-4923 · NVD
- FIRST EPSS
- GHSA-27v5-c462-wpq7 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-4923 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences