Curl 7.86.0 < 8.23.0 WebSocket GnuTLS Information Leak

high Nessus Plugin ID 371156

Language:

Synopsis

The remote host has a program that is affected by an information disclosure vulnerability.

Description

The version of curl installed on the remote host is 7.86.0 prior to 8.23.0. It is, therefore, affected by an information disclosure vulnerability:

- When curl is built with GnuTLS, a malicious WebSocket server can make curl send memory past its send buffer. This is due to an out of bounds read following when gnutls_record_send() returns a number of bytes sent greater than the number of bytes it was given to send. GnuTLS does that after a blocked send. (CVE-2026-107928)

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 8.23.0 or later.

Plugin Details

Severity: High

ID: 371156

File Name: curl_CVE-2026-107928.nasl

Version: 1.1

Type: Local

Agent: windows, macosx, unix

Family: Misc.

Published: 10/23/2026

Updated: 10/23/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus Agent, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

CVSS Score Rationale: Score from an analysis done by tenable

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.5

CVSS v3

Risk Factor: High

Base Score: 7.5

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

Vulnerability Information

CPE: cpe:/a:haxx:curl

Required KB Items: installed_sw/Curl

Patch Publication Date: 10/14/2026

Vulnerability Publication Date: 10/14/2026

Reference Information

CVE: CVE-2026-107928

IAVA: 2026-A-1143

Detections

Analytics