VDB
CVE-2026-28435
CVE-2026-28435
PUBLISHED
CVSS 7.5 HIGH
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.
EPSS 0.48% · 41.1th percentile
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
0.48%
41.1th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| yhirose | cpp-httplib | < 0.35.0, 0 |
Timeline
- Feb 27, 2026 CVE ID Reserved
- Mar 4, 2026 CVE Published
- Mar 4, 2026 PoC Published
- Mar 4, 2026 CVE Updated
- Mar 5, 2026 EPSS Score
- Mar 6, 2026 PoC Published
- Mar 7, 2026 EPSS Score
- Mar 9, 2026 EPSS Score
- Mar 11, 2026 EPSS Score
- Mar 13, 2026 EPSS Score
- Mar 16, 2026 EPSS Score
- Mar 17, 2026 Coalition ESS Score