CVE-2025-52887

Name	CVE-2025-52887
Description	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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
cpp-httplib (PTS)	bookworm	0.11.4+ds-1+deb12u1	fixed
	forky, sid, trixie	0.18.7-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
cpp-httplib	source	(unstable)	(not affected)

Notes

- cpp-httplib <not-affected> (Vulnerable code introduce in 0.21; only affected experimental versions)
https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-xjhg-gf59-p92h
https://github.com/yhirose/cpp-httplib/commit/28dcf379e82a2cdb544d812696a7fd46067eb7f9 (v0.22.0)