Curl 8.13.0 < 8.19.0 Use After Free in SMB Connection

high Nessus Plugin ID 302777

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Synopsis

The remote host has a program that is affected by a use after free in SMB connection vulnerability

Description

The version of curl installed on the remote host is 8.13.0 prior to 8.19.0 . It is, therefore, affected by a use after free in SMB connection vulnerability:

- When doing a second SMB request to the same host again, curl would wrongly use a data pointer pointing into already freed memory. (CVE-2026-3805)

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 8.19.0 or later

Plugin Details

Severity: High

ID: 302777

File Name: curl_CVE-2026-3805.nasl

Version: 1.2

Type: Local

Agent: windows, macosx, unix

Family: Misc.

Published: 3/17/2026

Updated: 3/18/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:haxx:curl

Required KB Items: installed_sw/Curl

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 3/11/2026

Vulnerability Publication Date: 3/11/2026

Reference Information

CVE: CVE-2026-3805

IAVA: 2026-A-0237

Detections

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