CVE-2026-22776
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductYhirose Cpp-httplib
PublishedJan 12, 2026
First seenJan 12, 2026
Weakness typeCWE-409CWE-409
How to fix
Update
- yhirose cpp-httplib0.30.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| yhirose cpp-httplib | v < 0.30.1 | 0.30.1 |
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