Bug 2444618 (CVE-2026-28435) - CVE-2026-28435 cpp-httplib: payload size limit bypass via gzip decompression in ContentReader (streaming) allows oversized request bodies
Summary: CVE-2026-28435 cpp-httplib: payload size limit bypass via gzip decompression ...
Keywords:
Status: NEW
Alias: CVE-2026-28435
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2444637 2444638
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-03-04 20:01 UTC by OSIDB Bzimport
Modified: 2026-03-04 20:22 UTC (History)
0 users

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Description OSIDB Bzimport 2026-03-04 20:01:40 UTC 
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.
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