CVE-2026-28435
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.
- Affected products
- Cpp-Httplib
- Yhirose Cpp-httplib
- < 0.35.0
- Fix
- Available
- CVSS 3.1
- 7.5 HIGH
- EPSS
- 0.4% (34th percentile)
- Weakness
- CWE-409, CWE-400
- NVD status
- Analyzed
- Published
- 2026-03-04
No indexed exploits for CVE-2026-28435 yet
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No exploit for CVE-2026-28435 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.