CVE-2026-28435
Description
cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.35.0, cpp-httplib (httplib.h) does not enforce Server::set_payload_max_length() on the decompressed request body when using HandlerWithContentReader (streaming ContentReader) with Content-Encoding: gzip (or other supported encodings). A small compressed payload can expand beyond the configured payload limit and be processed by the application, enabling a payload size limit bypass and potential denial of service (CPU/memory exhaustion). This vulnerability is fixed in 0.35.0.
How to fix
- yhirose cpp-httplib0.35.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| yhirose cpp-httplib | v < 0.35.0 | 0.35.0 |
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