Detections
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Curl 7.56.0 < 8.23.0 MIME Stack Overflow

high Nessus Plugin ID 371144

Synopsis

The remote host has a program that is affected by a stack overflow vulnerability.

Description

The version of curl installed on the remote host is 7.56.0 prior to 8.23.0. It is, therefore, affected by a stack overflow vulnerability:

 - A deeply nested multipart MIME structure constructed via the public API causes a stack overflow in libcurl during normal cleanup operations. An excessive recursion depth within curl_mime_free leads to unbounded stack frame allocation during structure traversal, ultimately crashing the host process. (CVE-2026-92391)

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.

See Also

https://curl.se/docs/CVE-2026-92391.html

Plugin Details

Severity: High

ID: 371144

File Name: curl_CVE-2026-92391.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: Low

Score: 3

Percentile: 23.7

CVSS v3

Risk Factor: High

Base Score: 7.5

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

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-2026-92391

IAVA: 2026-A-1143