CVE-2025-53629

HIGH EPSS 39.3%
Published Jul 10, 202511mo ago · Modified Jun 17, 20261w ago
7.5 CVSS 3.1
High
Find Similar
Published Jul 10, 2025 11mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
39.3% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-770

Affected Products 1

VendorProductVersionRange
yhirosecpp-httplib* <0.23.0

References 3

  • github.com https://github.com/yhirose/cpp-httplib/commit/17ba303889b8d4d719be3879a70639ab653efb99
    Patch
  • github.com https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-j6p8-779x-p5pw
    Not Applicable
  • github.com https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-qjmq-h3cc-qv6w
    ExploitVendor Advisory

Remediation

  • github.com https://github.com/yhirose/cpp-httplib/commit/17ba303889b8d4d719be3879a70639ab653efb99
    Patch