body-parser vulnerable to Denial of Service via trailing bytes after a compressed request body

{
  "id": "a3c5bcae0a058044224f8f018f59ef00eb6c5e167dd34ac0b3dda20344b1e4e5",
  "url": "https://osv.dev/vulnerability/GHSA-27r3-jxmh-p828",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "body-parser vulnerable to Denial of Service via trailing bytes after a compressed request body",
    "summary": "### Impact A 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. ### Patches Fixed in body-parser 2.4.0 and 1.20.9. Upgrade to one of these versions. ### Workarounds Pass `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.",
    "evidence": "osv:GHSA-27r3-jxmh-p828",
    "products": [
      {
        "name": {
          "value": "body-parser",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.4.0",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "body-parser",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.20.9",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "GHSA-27r3-jxmh-p828",
      "aliases": [
        "CVE-2026-111181",
        "GHSA-27r3-jxmh-p828"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "2.0.0"
                },
                {
                  "fixed": "2.4.0"
                }
              ]
            }
          ],
          "package": {
            "name": "body-parser",
            "purl": "pkg:npm/body-parser",
            "ecosystem": "npm"
          },
          "database_specific": {
            "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-27r3-jxmh-p828/GHSA-27r3-jxmh-p828.json"
          }
        },
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.20.9"
                }
              ]
            }
          ],
          "package": {
            "name": "body-parser",
            "purl": "pkg:npm/body-parser",
            "ecosystem": "npm"
          },
          "database_specific": {
            "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-27r3-jxmh-p828/GHSA-27r3-jxmh-p828.json"
          }
        }
      ],
      "modified": "2026-10-23T21:00:06.131613693Z",
      "provider": "osv",
      "references": [
        "https://github.com/expressjs/body-parser/security/advisories/GHSA-27r3-jxmh-p828",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-111181",
        "https://github.com/expressjs/body-parser/commit/1260c3845f54502a05a87594f09a334786bb34d7",
        "https://github.com/expressjs/body-parser/commit/f7075eae3a84c3473ab4bf0a777da28db208e916",
        "https://cna.openjsf.org/security-advisories.html",
        "https://github.com/expressjs/body-parser",
        "https://github.com/expressjs/body-parser/releases/tag/1.20.9",
        "https://github.com/expressjs/body-parser/releases/tag/v2.4.0"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-248"
        ],
        "severity": "HIGH",
        "github_reviewed": true,
        "nvd_published_at": "2026-10-22T15:17:04Z",
        "github_reviewed_at": "2026-10-23T20:53:11Z"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-111181",
        "evidence": "/aliases"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/database_specific/severity"
  },
  "source_id": "core-osv",
  "document_id": 427025,
  "published_at": "2026-10-23T20:53:11+00:00"
}