{"id":"CVE-2026-111181","title":"body-parser vulnerable to Denial of Service via trailing bytes after a compressed request body","summary":"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 …","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","cvssSource":"cna","cwe":["CWE-248"],"vendor":"body-parser","product":"body-parser","affected":["body-parser >= 2.0.0 < 2.4.0","body-parser < 1.20.9"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-22T18:26:41.855566Z"},"published":"2026-10-22","updated":"2026-10-22","sourceUpdated":"2026-10-22T19:00:31.729Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-111181","references":[{"url":"https://github.com/expressjs/body-parser/security/advisories/GHSA-27r3-jxmh-p828"},{"url":"https://cna.openjsf.org/security-advisories.html"}],"tags":["cve.org"],"ingestedAt":"2026-10-22T22:00:50.374Z","slug":"CVE-2026-111181","body":"## Overview\n\nbody-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.\n\n## Affected\n\n- `body-parser >= 2.0.0 < 2.4.0`\n- `body-parser < 1.20.9`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}