Fluid Attacks Database

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.

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem	Package	Affected version	Patched versions
debian 12	cpp-httplib	=0.11.4+ds-1 \|\| =0.11.4+ds-1+deb12u1 \|\| =0.11.4+ds-2 \|\| =0.11.4+ds-3 \|\| =0.13.1+ds-1 \|\| =0.14.0+ds-1 \|\| =0.14.1+ds-1 \|\| =0.14.1+ds-2 \|\| =0.14.2+ds-1 \|\| =0.14.3+ds-1 \|\| =0.14.3+ds-1.1 \|\| =0.14.3+ds-1.1~exp1 \|\| =0.15.3+ds-1 \|\| =0.15.3+ds-2 \|\| =0.15.3+ds-3 \|\| =0.16.0+ds-1 \|\| =0.16.3+ds-1 \|\| =0.16.3+ds-2 \|\| =0.18.0+ds-1 \|\| =0.18.7-1 \|\| =0.20.1+ds-3 \|\| =0.25.0+ds-1 \|\| =0.26.0+ds-2 \|\| =0.41.0+ds-1 \|\| =0.41.0+ds-2 \|\| =0.41.0+ds-3	-
debian 14	cpp-httplib	=0.18.7-1 \|\| =0.20.1+ds-3 \|\| =0.25.0+ds-1 \|\| =0.26.0+ds-2 \|\| =0.41.0+ds-1 \|\| =0.41.0+ds-2 \|\| >=0 <0.41.0+ds-3	0.41.0+ds-3
debian 13	cpp-httplib	=0.18.7-1 \|\| =0.18.7-1+deb13u1 \|\| =0.20.1+ds-3 \|\| =0.25.0+ds-1 \|\| =0.26.0+ds-2 \|\| =0.41.0+ds-1 \|\| =0.41.0+ds-2 \|\| =0.41.0+ds-3	-

Aliases

1. CVE-2026-227762. NVD-2026-227763. OSV-DEBIAN-2026-227764. OSV-2026-227765. SECURITY-TRACKER-CVE-2026-22776

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