Description
cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.20.1, cpp-httplib does not have a limit for a unique line, permitting an attacker to explore this to allocate memory arbitrarily. This vulnerability is fixed in 0.20.1. NOTE: This vulnerability is related to CVE-2025-53629.
References (3)
Scores
CVSS v3
8.8
EPSS
0.0005
EPSS Percentile
15.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-770
CWE-444
CWE-835
Status
published
Products (1)
yhirose/cpp-httplib
< 0.20.1
Published
Jul 10, 2025
Tracked Since
Feb 18, 2026