Description
cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to version 0.30.1, a Denial of Service (DoS) vulnerability exists in cpp-httplib due to the unsafe handling of compressed HTTP request bodies (Content-Encoding: gzip, br, etc.). The library validates the payload_max_length against the compressed data size received from the network, but does not limit the size of the decompressed data stored in memory.
References
https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-h934-98h4-j43q
ExploitVendor Advisory
CVSS impact metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5 · High
Information
Source identifier
Vulnerability status
Analyzed
Published
2026-01-12T19:16:03.630Z
3 days agoLast modified
2026-01-15T22:43:10.097Z
1 hour ago