Detections
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libcurl 7.87.0 < 8.18.0 OpenSSL partial chain store policy bypass (CVE-2025-14819)

medium Nessus Plugin ID 291362

Synopsis

The remote host has a program that is affected by an improper certificate validation.

Description

The version of libcurl installed on the remote host is missing a security update. It is, therefore, affected by a improper certificate validation vulnerability.

 - When performing TLS transfers with reused easy or multi handles and altering the CURLSSLOPT_NO_PARTIALCHAIN option, libcurl could accidentally reuse a CA store cached in memory for which the partial chain option was reversed. This could make libcurl find and accept a trust chain that it otherwise would not.

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

Solution

Upgrade libcurl to version 8.18.0 or later

See Also

https://curl.se/docs/CVE-2025-14819.html

Plugin Details

Severity: Medium

ID: 291362

File Name: curl_CVE-2025-14819.nasl

Version: 1.1

Type: local

Agent: windows, macosx, unix

Family: Misc.

Published: 1/19/2026

Updated: 1/19/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.1

CVSS v2

Risk Factor: Medium

Base Score: 5.4

Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:N/A:N

CVSS Score Source: CVE-2025-14819

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

Vulnerability Information

CPE: cpe:/a:haxx:libcurl

Required KB Items: installed_sw/libcurl

Patch Publication Date: 1/7/2026

Vulnerability Publication Date: 1/7/2026

Reference Information

CVE: CVE-2025-14819

IAVA: 2026-A-0005