--- id: CVE-2024-21536 title: >- Versions of the package http-proxy-middleware before 2.0.7, from 3.0.0 and before 3.0.3 are vulnerable to Denial of Service (DoS) due to an UnhandledPromiseRejection error thrown by micromatch summary: >- Versions of the package http-proxy-middleware before 2.0.7, from 3.0.0 and before 3.0.3 are vulnerable to Denial of Service (DoS) due to an UnhandledPromiseRejection error thrown by micromatch. An attacker could kill the Node.js process … severity: high cvss: 7.5 cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H' cwe: - CWE-400 vendor: chimurai product: http-proxy-middleware affected: - http-proxy-middleware < 2.0.7 - 'http-proxy-middleware >= 3.0.0, < 3.0.3' patched: - http-proxy-middleware 3.0.3 published: '2024-10-19' updated: '2026-08-01' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2024-21536' references: - url: 'https://gist.github.com/mhassan1/28be67266d82a53708ed59ce5dc3c94a' label: report@snyk.io - url: >- https://github.com/chimurai/http-proxy-middleware/commit/0b4274e8cc9e9a2c5a06f35fbf456ccfcebc55a5 label: report@snyk.io - url: >- https://github.com/chimurai/http-proxy-middleware/commit/788b21e4aff38332d6319557d4a5b1b13b1f9a22 label: report@snyk.io - url: 'https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-8309098' label: report@snyk.io - url: 'https://security.snyk.io/vuln/SNYK-JS-HTTPPROXYMIDDLEWARE-8229906' label: report@snyk.io - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-21536.json - url: 'https://access.redhat.com/security/cve/CVE-2024-21536' - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2319884' - url: 'https://www.cve.org/CVERecord?id=CVE-2024-21536' - url: 'https://nvd.nist.gov/vuln/detail/CVE-2024-21536' - url: 'https://access.redhat.com/errata/RHSA-2025:3928' - url: 'https://access.redhat.com/errata/RHSA-2025:3929' - url: 'https://access.redhat.com/errata/RHSA-2025:3930' - url: 'https://access.redhat.com/errata/RHSA-2025:8510' - url: 'https://access.redhat.com/errata/RHSA-2024:9627' - url: 'https://access.redhat.com/errata/RHBA-2024:9054' - url: 'https://access.redhat.com/errata/RHSA-2025:8551' - url: 'https://access.redhat.com/errata/RHSA-2025:8544' - url: 'https://access.redhat.com/errata/RHSA-2025:8479' - url: 'https://access.redhat.com/errata/RHSA-2025:8059' - url: 'https://access.redhat.com/errata/RHSA-2025:4511' - url: 'https://access.redhat.com/errata/RHSA-2025:1249' - url: 'https://access.redhat.com/errata/RHBA-2024:11265' - url: 'https://access.redhat.com/errata/RHSA-2025:8512' - url: 'https://access.redhat.com/errata/RHSA-2025:9294' - url: 'https://access.redhat.com/errata/RHSA-2025:8233' - url: 'https://access.redhat.com/errata/RHSA-2025:10853' - url: 'https://access.redhat.com/errata/RHSA-2024:10917' - url: 'https://access.redhat.com/errata/RHSA-2024:10962' - url: 'https://access.redhat.com/errata/RHSA-2024:11256' - url: 'https://access.redhat.com/errata/RHSA-2024:11255' tags: - nvd - csaf - vex - red-hat epss: 0.01034 epssPercentile: 0.62359 ingestedAt: '2026-08-01T17:13:12.775Z' --- ## Overview Versions of the package http-proxy-middleware before 2.0.7, from 3.0.0 and before 3.0.3 are vulnerable to Denial of Service (DoS) due to an UnhandledPromiseRejection error thrown by micromatch. An attacker could kill the Node.js process and crash the server by making requests to certain paths. ## Affected - `http-proxy-middleware < 2.0.7` - `http-proxy-middleware >= 3.0.0, < 3.0.3` ## Remediation Upgrade past the affected range: - `http-proxy-middleware 3.0.3` ## Vendor advisories - **RHSA-2025:3928** · Red Hat · fixed in: RHACS 4.5 for RHEL 8 · released 2025-04-15 · [advisory](https://access.redhat.com/errata/RHSA-2025:3928) - **RHSA-2025:3929** · Red Hat · fixed in: RHACS 4.6 for RHEL 8 · released 2025-04-15 · [advisory](https://access.redhat.com/errata/RHSA-2025:3929) - **RHSA-2025:3930** · Red Hat · fixed in: RHACS 4.7 for RHEL 8 · released 2025-04-15 · [advisory](https://access.redhat.com/errata/RHSA-2025:3930) - **RHSA-2025:8510** · Red Hat · fixed in: 8Base-RHMTC-1.8 · released 2025-06-04 · [advisory](https://access.redhat.com/errata/RHSA-2025:8510) - **RHSA-2024:9627** · Red Hat · fixed in: RHOSSM 2.6 for RHEL 8, RHOSSM 2.6 for RHEL 9 · released 2024-11-14 · [advisory](https://access.redhat.com/errata/RHSA-2024:9627) - **RHBA-2024:9054** · Red Hat · fixed in: Red Hat Developer Hub 1.3 for RHEL 9 · released 2024-11-11 · [advisory](https://access.redhat.com/errata/RHBA-2024:9054) - **RHSA-2025:8551** · Red Hat · fixed in: RHODF 4.14 for RHEL 9 · released 2025-06-04 · [advisory](https://access.redhat.com/errata/RHSA-2025:8551) - **RHSA-2025:8544** · Red Hat · fixed in: RHODF 4.15 for RHEL 9 · released 2025-06-04 · [advisory](https://access.redhat.com/errata/RHSA-2025:8544) - **RHSA-2025:8479** · Red Hat · fixed in: RHODF 4.16 for RHEL 9 · released 2025-06-04 · [advisory](https://access.redhat.com/errata/RHSA-2025:8479) - **RHSA-2025:8059** · Red Hat · fixed in: RHODF 4.17 for RHEL 9 · released 2025-05-21 · [advisory](https://access.redhat.com/errata/RHSA-2025:8059) - **RHSA-2025:4511** · Red Hat · fixed in: RHODF 4.18 for RHEL 9 · released 2025-05-06 · [advisory](https://access.redhat.com/errata/RHSA-2025:4511) - **Red Hat VEX** · Moderate · affected: Cryostat 3, Logging Subsystem for Red Hat OpenShift, Migration Toolkit for Applications 7, Node HealthCheck Operator, OpenShift Pipelines, OpenShift Service Mesh 2, … · no fix planned: Logging Subsystem for Red Hat OpenShift, Migration Toolkit for Applications 7, Node HealthCheck Operator, OpenShift Pipelines, … · updated 2026-09-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-21536.json)