{"id":"CVE-2026-111181","aliases":["GHSA-27r3-jxmh-p828"],"title":"body-parser vulnerable to Denial of Service via trailing bytes after a compressed request body","summary":"body-parser vulnerable to Denial of Service via trailing bytes after a compressed request body","severity":"high","cvss":7.5,"cwe":["CWE-248"],"vendor":"body-parser","product":"body-parser","ecosystem":"npm","affected":["body-parser >= 2.0.0, < 2.4.0","body-parser < 1.20.9"],"patched":["body-parser 2.4.0","body-parser 1.20.9"],"published":"2026-10-23","updated":"2026-10-23","sourceUpdated":"2026-10-23T20:53:12Z","source":"GHSA","sourceUrl":"https://github.com/advisories/GHSA-27r3-jxmh-p828","references":[{"url":"https://github.com/expressjs/body-parser/security/advisories/GHSA-27r3-jxmh-p828"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111181"},{"url":"https://github.com/expressjs/body-parser/commit/1260c3845f54502a05a87594f09a334786bb34d7"},{"url":"https://github.com/expressjs/body-parser/commit/f7075eae3a84c3473ab4bf0a777da28db208e916"},{"url":"https://cna.openjsf.org/security-advisories.html"},{"url":"https://github.com/expressjs/body-parser/releases/tag/1.20.9"},{"url":"https://github.com/expressjs/body-parser/releases/tag/v2.4.0"},{"url":"https://github.com/advisories/GHSA-27r3-jxmh-p828"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-111181.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-111181"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2559049"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-111181"}],"tags":["ghsa","npm","csaf","vex","red-hat","cve.org"],"epss":0.00388,"epssPercentile":0.32723,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-22T18:26:41.855566Z"},"ingestedAt":"2026-10-22T22:00:50.374Z","slug":"CVE-2026-111181","body":"## Overview\n\n### 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.\n\n## Affected packages\n\n- `body-parser >= 2.0.0, < 2.4.0`\n- `body-parser < 1.20.9`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `body-parser 2.4.0`\n- `body-parser 1.20.9`\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Red Hat Hardened Images · no fix planned: Red Hat Hardened Images · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-111181.json)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}