High 8.7Published Jan 12, 2026

CVE-2026-22776cpp-httplib vulnerable to a denial of service (DOS) using a zip bomb

Updated under an hour ago (Oct 26, 2026, 6:00 PM ET)

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Every CVE for yhirose cpp-httplib

Exploited in the last 30 days

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.

CVSS: 8.7 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Weakness (CWE): CWE-409
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Jan 12, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

yhirose cpp-httplib yhirose:cpp_httplib (from the name)	before 0.30.1	CNA record
yhirose cpp-httplib yhirose:cpp-httplib	before 0.30.1	NVD

References

References

https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-h934-98h4-j43q	x-refsource-confirm, exploit, vendor-advisory
https://github.com/yhirose/cpp-httplib/commit/2e2e47bab1ae6a853476eecbc4bf279dd1fef792	x-refsource-misc, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.