CVE-2025-46728

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://github.com/yhirose/cpp-httplib/commit/7b752106ac42bd5b907793950d9125a0972c8e8e", "name": "https://github.com/yhirose/cpp-httplib/commit/7b752106ac42bd5b907793950d9125a0972c8e8e", "tags": ["Patch"], "refsource": ""}, {"url": "https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-px83-72rx-v57c", "name": "https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-px83-72rx-v57c", "tags": ["Exploit", "Vendor Advisory"], "refsource": ""}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "cpp-httplib is a C++ header-only HTTP/HTTPS server and client library. Prior to version 0.20.1, the library fails to enforce configured size limits on incoming request bodies when `Transfer-Encoding: chunked` is used or when no `Content-Length` header is provided. A remote attacker can send a chunked request without the terminating zero-length chunk, causing uncontrolled memory allocation on the server. This leads to potential exhaustion of system memory and results in a server crash or unresponsiveness. Version 0.20.1 fixes the issue by enforcing limits during parsing. If the limit is exceeded at any point during reading, the connection is terminated immediately. A short-term workaround through a Reverse Proxy is available. If updating the library immediately is not feasible, deploy a reverse proxy (e.g., Nginx, HAProxy) in front of the `cpp-httplib` application. Configure the proxy to enforce maximum request body size limits, thereby stopping excessively large requests before they reach the vulnerable library code."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-400"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2025-46728", "ASSIGNER": "security-advisories@github.com"}}, "impact": {}, "publishedDate": "2025-05-06T01:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:cpp-httplib_project:cpp-httplib:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "0.20.1"}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2025-08-01T21:25Z"}