Improper Handling of Highly Compressed Data (Data Amplification) Affecting cpp-httplib package, versions <0.41.0+ds-3


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

Social Trends
EPSS
0.36% (29th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-CPPHTTPLIB-14913864
  • published13 Jan 2026
  • disclosed12 Jan 2026

Introduced: 12 Jan 2026

CVE-2026-22776  (opens in a new tab)
CWE-409  (opens in a new tab)

How to fix?

Upgrade Debian:unstable cpp-httplib to version 0.41.0+ds-3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream cpp-httplib package and not the cpp-httplib package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

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 Base Scores

version 3.1