{"id":"CVE-2025-67731","aliases":["GHSA-qgc4-8p88-4w7m"],"url":"https://o3.security/vulnerability/CVE-2025-67731","summary":"Servify Express does not enforce rate limiting when parsing JSON","details":"### Impact\nThe Express server uses `express.json()` without a size limit, which can allow attackers to send extremely large request bodies. This may lead to excessive memory usage, degraded performance, or process crashes, resulting in a Denial of Service (DoS). Any application using the JSON parser without limits and exposed to untrusted clients is affected.\n\n### Patches\nThis issue is not a flaw in Express itself but in configuration. Users should set a request-size limit when enabling the JSON body parser. For example:\n`app.use(express.json({ limit: \"100kb\" }));`\n\n### Workarounds\nUsers can mitigate the issue without upgrading by:\n- Adding a `limit` option to the JSON parser\n- Implementing rate limiting at the application or reverse-proxy level\n- Rejecting unusually large requests before parsing\n- Using a reverse proxy (such as NGINX) to enforce maximum request body sizes","published":"2025-12-12T07:40:53.047Z","modified":"2026-08-12T03:51:47.706282750Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"npm","name":"servify-express","fixedVersion":"1.2"}],"fix":{"url":"https://github.com/Aarondoran/servify-express/commit/8dff7f56504b356278d849734ef2050e5cd23b61","label":"Aarondoran/servify-express@8dff7f5"},"references":[{"type":"WEB","url":"https://github.com/Aarondoran/servify-express/releases/tag/V1.2"},{"type":"ADVISORY","url":"https://github.com/Aarondoran/servify-express/security/advisories/GHSA-qgc4-8p88-4w7m"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/67xxx/CVE-2025-67731.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-67731"},{"type":"FIX","url":"https://github.com/Aarondoran/servify-express/commit/8dff7f56504b356278d849734ef2050e5cd23b61"},{"type":"WEB","url":"https://github.com/Aarondoran/servify-express/commit/197d848e5450bf85b0dd19ef8c2aa4ba96192300"},{"type":"PACKAGE","url":"https://github.com/Aarondoran/servify-express"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:47.706282750Z"}}