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.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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.
    (CVE-2025-53628)

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:20295-1 advisory.

    - CVE-2025-53629: header can allocate memory arbitrarily in the server, potentially leading to its     exhaustion       (bsc#1246471).
    - CVE-2025-53628: HTTP header smuggling due to insecure trailers merge (bsc#1246468).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES16 / SLES_SAP16 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:20600-1 advisory.

    - CVE-2025-53629: header can allocate memory arbitrarily in the server, potentially leading to its     exhaustion       (bsc#1246471).
    - CVE-2025-53628: HTTP header smuggling due to insecure trailers merge (bsc#1246468).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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.
    (CVE-2025-53628)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
459402	Echo: cpp-httplib: security update to 0.18.7-1+e3	Tenable Cloud Security	Echo Local Security Checks	Local	medium
459402	Echo: cpp-httplib: security update to 0.18.7-1+e3	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	medium
301320	openSUSE 16 Security Update : cpp-httplib (openSUSE-SU-2026:20295-1)	Nessus	SuSE Local Security Checks	Local	medium
301281	SUSE SLES16 Security Update : cpp-httplib (SUSE-SU-2026:20600-1)	Nessus	SuSE Local Security Checks	Local	medium
252875	Linux Distros Unpatched Vulnerability : CVE-2025-53628	Nessus	Misc.	Local	medium

Detections

Analytics

CVE-2025-53628

medium

Tenable Plugins

medium

medium

medium

medium

medium