High severity7.5NVD Advisory· Published Jul 10, 2025· Updated Jun 17, 2026

CVE-2025-53629

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Yhirose/Cpp Httplib2 versions
cpe:2.3:a:yhirose:cpp-httplib:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:yhirose:cpp-httplib:*:*:*:*:*:*:*:*range: <0.23.0
- (no CPE)range: < 0.23.0
Cpp Httplib/cpp-httplibllm-fuzzy
Range: <0.23.0
osv-coords3 versions
pkg:rpm/opensuse/cpp-httplib&distro=openSUSE%20Leap%2016.0 pkg:rpm/suse/cpp-httplib&distro=SUSE%20Linux%20Enterprise%20Server%2016.0 pkg:rpm/suse/cpp-httplib&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0
< 0.22.0-160000.4.1+ 2 more
- (no CPE)range: < 0.22.0-160000.4.1
- (no CPE)range: < 0.22.0-160000.4.1
- (no CPE)range: < 0.22.0-160000.4.1

Patches

Vulnerability mechanics

References

github.com/yhirose/cpp-httplib/commit/17ba303889b8d4d719be3879a70639ab653efb99nvdPatch
github.com/yhirose/cpp-httplib/security/advisories/GHSA-qjmq-h3cc-qv6wnvdExploitVendor Advisory
github.com/yhirose/cpp-httplib/security/advisories/GHSA-j6p8-779x-p5pwnvdNot Applicable

News mentions

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exploit	0.000
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ransomware	0.000