CVE-2026-28435
HIGHCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
4Description
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.
Analysis
cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. [CVSS 7.5 HIGH]
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Remediation
Within 24 hours: Inventory all applications and systems using cpp-httplib and assess exposure in your environment. Within 7 days: Apply available vendor patches to all affected systems, prioritizing internet-facing and critical infrastructure. …
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