High severity7.5NVD Advisory· Published Jan 12, 2026· Updated Jun 17, 2026
CVE-2026-22776
CVE-2026-22776
Description
cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to version 0.30.1, a Denial of Service (DoS) vulnerability exists in cpp-httplib due to the unsafe handling of compressed HTTP request bodies (Content-Encoding: gzip, br, etc.). The library validates the payload_max_length against the compressed data size received from the network, but does not limit the size of the decompressed data stored in memory.
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Affected products
4cpe:2.3:a:yhirose:cpp-httplib:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:yhirose:cpp-httplib:*:*:*:*:*:*:*:*range: <0.30.1
- (no CPE)range: < 0.30.1
- Range: <0.30.1
Patches
Vulnerability mechanics
References
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