Detections
Analytics

Curl 8.8.0 < 8.18.0 Improper Certificate Validation.

medium Nessus Plugin ID 291358

Synopsis

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

Description

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

 - When using the CURLOPT_PINNEDPUBLICKEY option with libcurl or --pinnedpubkey with the curl tool, the public key check should be performed to verify the server certificate peer. However, this check is skipped if the connection uses QUIC with ngtcp2 built against GnuTLS and the user has explicitly disabled standard certificate verification. This could allow a connection to an impostor server without the intended public key verification.

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

Solution

Upgrade Curl to version 8.18.0 or later

See Also

https://curl.se/docs/CVE-2025-13034.html

Plugin Details

Severity: Medium

ID: 291358

File Name: curl_CVE-2025-13034.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, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5.4

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

CVSS Score Source: CVE-2025-13034

CVSS v3

Risk Factor: Medium

Base Score: 5.9

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

Vulnerability Information

CPE: cpe:/a:haxx:curl

Required KB Items: installed_sw/Curl

Patch Publication Date: 1/7/2026

Vulnerability Publication Date: 1/7/2026

Reference Information

CVE: CVE-2025-13034

IAVA: 2026-A-0005