{"id":"CVE-2026-111181","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-111181","summary":"body-parser vulnerable to Denial of Service via trailing bytes after a compressed request body","details":"### Impact\n\nA single request can crash any application using `body-parser` with default options. When a request carries a `Content-Encoding` (for example `gzip`), `body-parser` pipes it into a decompression stream and, after reading the body, leaves that stream piped 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 authentication or matching route is required, since parsing runs before routing.\n\n### Patches\n\nFixed in body-parser 2.4.0 and 1.20.9. Upgrade to one of these versions.\n\n### Workarounds\n\nPass `inflate: false` to the body-parser middleware if the application does not need to accept compressed request bodies. This rejects encoded requests before any decompression stream is created.","published":"2026-10-23T20:53:11Z","modified":"2026-10-23T21:00:06.131613693Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"npm","name":"body-parser","fixedVersion":"2.4.0"},{"ecosystem":"npm","name":"body-parser","fixedVersion":"1.20.9"}],"fix":{"url":"https://github.com/expressjs/body-parser/commit/1260c3845f54502a05a87594f09a334786bb34d7","label":"expressjs/body-parser@1260c38"},"references":[{"type":"WEB","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"},{"type":"WEB","url":"https://github.com/expressjs/body-parser/commit/1260c3845f54502a05a87594f09a334786bb34d7"},{"type":"WEB","url":"https://github.com/expressjs/body-parser/commit/f7075eae3a84c3473ab4bf0a777da28db208e916"},{"type":"WEB","url":"https://cna.openjsf.org/security-advisories.html"},{"type":"PACKAGE","url":"https://github.com/expressjs/body-parser"},{"type":"WEB","url":"https://github.com/expressjs/body-parser/releases/tag/1.20.9"},{"type":"WEB","url":"https://github.com/expressjs/body-parser/releases/tag/v2.4.0"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-23T21:00:06.131613693Z"}}