CVE-2025-53628
cpp-httplib Unbounded Line Memory Allocation Buffer Overflow
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.
INFO
Published Date :
July 10, 2025, 8:15 p.m.
Last Modified :
Aug. 6, 2025, 6:08 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2025-53628
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] | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update cpp-httplib to version 0.20.1.
- Ensure memory allocation limits are properly configured.
Public PoC/Exploit Available at Github
CVE-2025-53628 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
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-2025-53628.
| URL | Resource |
|---|---|
| https://github.com/yhirose/cpp-httplib/commit/7b752106ac42bd5b907793950d9125a0972c8e8e | Patch |
| https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-j6p8-779x-p5pw | Vendor Advisory Exploit |
| https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-qjmq-h3cc-qv6w | Not Applicable |
| https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-j6p8-779x-p5pw | Vendor Advisory Exploit |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-53628 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-2025-53628
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).
None
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-53628 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-53628 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 CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Added CWE CWE-444 Added CPE Configuration OR *cpe:2.3:a:yhirose:cpp-httplib:*:*:*:*:*:*:*:* versions up to (excluding) 0.20.1 Added Reference Type GitHub, Inc.: https://github.com/yhirose/cpp-httplib/commit/7b752106ac42bd5b907793950d9125a0972c8e8e Types: Patch Added Reference Type GitHub, Inc.: https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-j6p8-779x-p5pw Types: Exploit, Vendor Advisory Added Reference Type GitHub, Inc.: https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-qjmq-h3cc-qv6w Types: Not Applicable Added Reference Type CISA-ADP: https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-j6p8-779x-p5pw 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-j6p8-779x-p5pw -
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 0.20.1, 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. Added CVSS V4.0 AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-770 Added CWE CWE-835 Added Reference https://github.com/yhirose/cpp-httplib/commit/7b752106ac42bd5b907793950d9125a0972c8e8e 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