PT-2025-19817 · Unknown+2 · Cpp-Httplib+2

Thevilledev · CVE-2025-46728 · Published 2025-05-06 · Updated 2025-12-05

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions cpp-httplib versions prior to 0.20.1

Description cpp-httplib is a C++ header-only HTTP/HTTPS server and client library. Versions prior to 0.20.1 do not enforce configured size limits on incoming request bodies when Transfer-Encoding: chunked is used or when no Content-Length header is provided. This allows a remote attacker to send a chunked request without the terminating zero-length chunk, leading to uncontrolled memory allocation. This can result in exhaustion of system memory and a server crash or unresponsiveness.

Recommendations Upgrade to cpp-httplib version 0.20.1 or later. As a temporary workaround, deploy a reverse proxy (e.g., Nginx, HAProxy) and configure it to enforce maximum request body size limits.

Exploit

Fix

DoS

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

ALT-PU-2025-10262

BDU:2026-00239

CVE-2025-46728

ECHO-F24E-40E5-BA8E

GHSA-PX83-72RX-V57C

OESA-2025-1610

OESA-2025-1611

OESA-2025-1612

OESA-2025-1613

OPENSUSE-SU-2025:15084-1

Affected Products

Alt Linux

Debian

Cpp-Httplib

References · 35

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/46xxx/CVE-2025-46728.json · Exploit
• https://github.com/yhirose/cpp-httplib/commit/7b752106ac42bd5b907793950d9125a0972c8e8e · Patch
• https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-px83-72rx-v57c · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2025:15084-1 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2025-1611 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-46728 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-46728 · Security Note
• https://osv.dev/vulnerability/OESA-2025-1613 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-00239 · Security Note
• https://osv.dev/vulnerability/CVE-2025-46728 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2025-46728 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2025-1610 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2025-1612 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-46728 · Security Note
• https://ubuntu.com/security/CVE-2025-46728 · Vendor Advisory