Inconsistent interpretation of HTTP requests in Cpp-httplib - CVE-2025-53628

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Main Vulnerability Database Vulnerabilities #VU114681

Inconsistent interpretation of HTTP requests in Cpp-httplib - CVE-2025-53628

Published: September 2, 2025


Vulnerability identifier: #VU114681
CSH Severity: Medium
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:L/SA:N]
CVE-ID: CVE-2025-53628
CWE-ID: CWE-444
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform HTTP request smuggling attacks.

The vulnerability exists due to improper validation of HTTP requests. A remote attacker can send a specially crafted HTTP request to the server and smuggle arbitrary HTTP headers.

Successful exploitation of vulnerability may allow an attacker to poison HTTP cache and perform phishing attacks.


Affected software

Cpp-httplib
Fedora
openEuler
cpp-httplib-debuginfo
cpp-httplib-devel
cpp-httplib-debugsource
cpp-httplib

How to mitigate CVE-2025-53628

Install updates from vendor's website.

Cpp-httplib - update to 0.23.0
cpp-httplib-debuginfo - update to 0.22.0-2
cpp-httplib-devel - update to 0.22.0-2
cpp-httplib-debugsource - update to 0.22.0-2
cpp-httplib - update to 0.22.0-2
cpp-httplib - update to 0.26.0-1.el10_2

External References

Related Security Bulletins