Allocation of Resources Without Limits or Throttling Affecting cpp-httplib package, versions <0.18.7-1+e4


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.59% (47th percentile)

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  • Snyk IDSNYK-ECHOLATEST-CPPHTTPLIB-19401929
  • published28 Aug 2026
  • disclosed10 Jul 2025

Introduced: 10 Jul 2025

CVE-2025-53629  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade Echo:latest cpp-httplib to version 0.18.7-1+e4 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 Echo. See How to fix? for Echo:latest relevant fixed versions and status.

cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.23.0, incoming requests using Transfer-Encoding: chunked in the header can allocate memory arbitrarily in the server, potentially leading to its exhaustion. This vulnerability is fixed in 0.23.0. NOTE: This vulnerability is related to CVE-2025-53628.

CVSS Base Scores

version 3.1