CVE-2025-53629
cpp-httplib Chunked Request Memory Exhaustion Vulnerability
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.
INFO
Published Date :
July 10, 2025, 8:15 p.m.
Last Modified :
Aug. 6, 2025, 6:09 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2025-53629
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update cpp-httplib to version 0.23.0 or later.
- Review and apply security patches from the vendor.
- Monitor server memory usage for potential issues.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-53629.
| URL | Resource |
|---|---|
| https://github.com/yhirose/cpp-httplib/commit/17ba303889b8d4d719be3879a70639ab653efb99 | Patch |
| https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-j6p8-779x-p5pw | Not Applicable |
| https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-qjmq-h3cc-qv6w | Exploit Vendor Advisory |
| https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-qjmq-h3cc-qv6w | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-53629 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-53629
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-53629 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-53629 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Aug. 06, 2025
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:yhirose:cpp-httplib:*:*:*:*:*:*:*:* versions up to (excluding) 0.23.0 Added Reference Type GitHub, Inc.: https://github.com/yhirose/cpp-httplib/commit/17ba303889b8d4d719be3879a70639ab653efb99 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-j6p8-779x-p5pw Types: Not Applicable Added Reference Type GitHub, Inc.: https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-qjmq-h3cc-qv6w Types: Exploit, Vendor Advisory Added Reference Type CISA-ADP: https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-qjmq-h3cc-qv6w Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 10, 2025
Action Type Old Value New Value Added Reference https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-qjmq-h3cc-qv6w -
New CVE Received by [email protected]
Jul. 10, 2025
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-770 Added Reference https://github.com/yhirose/cpp-httplib/commit/17ba303889b8d4d719be3879a70639ab653efb99 Added Reference https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-j6p8-779x-p5pw Added Reference https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-qjmq-h3cc-qv6w