{"id":"CVE-2026-111181","summary":"body-parser vulnerable to Denial of Service via trailing bytes after a compressed request body","details":"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.","aliases":["GHSA-27r3-jxmh-p828"],"modified":"2026-11-06T17:27:29.386309897Z","published":"2026-10-22T14:29:56.577Z","related":["openSUSE-SU-2026:12424-1","openSUSE-SU-2026:12429-1"],"database_specific":{"cna_assigner":"openjs","cwe_ids":["CWE-248"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111181.json"},"references":[{"type":"ADVISORY","url":"https://cna.openjsf.org/security-advisories.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111181.json"},{"type":"ADVISORY","url":"https://github.com/expressjs/body-parser/security/advisories/GHSA-27r3-jxmh-p828"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111181"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/expressjs/body-parser","events":[{"introduced":"9e06a79ca94da7c603a03d7deec56a54f8951330"},{"fixed":"b4744d739e1e2e5257f2ddac31eed191aa5152a4"},{"introduced":"0"},{"fixed":"a64f1404e256b3f0e3ce633e081a7593fe482203"}],"database_specific":{"extracted_events":[{"range":[{"introduced":"2.0.0"},{"fixed":"2.4.0"}],"source":"AFFECTED_FIELD","strategy":"StandardRange"},{"range":[{"introduced":"0"},{"fixed":"1.20.9"}],"source":"AFFECTED_FIELD","strategy":"StandardRange"}]}}],"versions":["1.20.8","1.20.7","1.20.6","1.20.5","v2.3.0","v2.2.2","1.20.4","v2.2.1","v2.2.0","v2.1.0","2.0.1","1.20.3","2.0.0","1.20.2","1.20.1","1.20.0","1.19.2","1.19.1","1.19.0","1.18.3","1.18.2","1.18.1","1.18.0","1.17.2","1.17.1","1.17.0","1.16.1","1.16.0","1.15.2","1.15.1","1.15.0","1.14.2","1.14.1","1.14.0","1.13.3","1.13.2","1.13.1","1.13.0","1.12.4","1.12.3","1.12.2","1.12.1","1.12.0","1.11.0","1.10.2","1.10.1","1.10.0","1.9.3","1.9.2","1.9.1","1.9.0","1.8.4","1.8.3","1.8.2","1.8.1","1.8.0","1.7.0","1.6.7","1.6.6","1.6.5","1.6.4","1.6.3","1.6.2","1.6.1","1.6.0","1.5.2","1.5.1","1.5.0","1.4.3","1.4.2","1.4.1","1.4.0","1.3.1","1.3.0","1.2.2","1.2.1","1.2.0","1.1.2","1.1.1","1.1.0","1.0.2","1.0.1","1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-111181.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}