Vulnerability Details CVE-2025-52887
cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. In version 0.21.0, when many http headers fields are passed in, the library does not limit the number of headers, and the memory associated with the headers will not be released when the connection is disconnected. This leads to potential exhaustion of system memory and results in a server crash or unresponsiveness. Version 0.22.0 contains a patch for the issue.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 23.8%
CVSS Severity
CVSS v3 Score 7.5
References
Products affected by CVE-2025-52887
-
cpe:2.3:a:yhirose:cpp-httplib:0.21.0