{"id":"CVE-2026-111181","revision":"a0c42956c0f8444285ade45f62382549","records":[{"revision":"a0c42956c0f8444285ade45f62382549","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-111181","aliases":[],"title":"body-parser vulnerable to Denial of Service via trailing bytes after a compressed request body","description":"body-parser is body parsing middleware for Node.js and Express. In versions before 1.20.9 and in versions from 2.0.0 before 2.4.0, a single request can crash any application using body-parser with default options. When a request carries a Content-Encoding such as gzip, body-parser pipes it into a decompression stream and, after reading the body, leaves that stream with no error listener. A payload of one valid compressed frame followed by trailing bytes decodes and the application responds normally, but the trailing bytes then reach the already-finished decoder, which emits an error that is re-thrown as an uncaught exception and terminates the process. No matching route is required because body parsing runs before routing, so any endpoint that parses a body is affected. The issue is fixed in body-parser 2.4.0 and 1.20.9, and users should upgrade to one of those versions or later. As a workaround, disable request-body inflation (set the body-parser inflate option to false) so encoded requests are rejected before any decompression stream is created.","state":0,"publishedAt":"2026-10-22T14:29:56.577+00:00","modifiedAt":"2026-10-22T19:00:31.729+00:00","affected":[{"ecosystem":"Vendor product","name":"body-parser","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"body-parser\",\n                    \"product\": \"body-parser\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"versionType\": \"semver\",\n                            \"status\": \"affected\",\n                            \"version\": \"2.0.0\",\n                            \"lessThan\": \"2.4.0\"\n                        },\n                        {\n                            \"versionType\": \"semver\",\n                            \"status\": \"unaffected\",\n                            \"version\": \"2.4.0\"\n                        },\n                        {\n                            \"versionType\": \"semver\",\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThan\": \"1.20.9\"\n                        },\n                        {\n                            \"versionType\": \"semver\",\n                            \"status\": \"unaffected\",\n                            \"version\": \"1.20.9\"\n                        }\n                    ],\n                    \"packageURL\": \"pkg:npm/body-parser\"\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/expressjs/body-parser/security/advisories/GHSA-27r3-jxmh-p828","https://cna.openjsf.org/security-advisories.html"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-111181","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-111181","identifiers":["CVE-2026-111181"]},"retained":false,"historicalAffected":[]}],"coverage":[]}