Detections
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Curl 8.15.0 < 8.21.0 SASL Double-Free

critical Nessus Plugin ID 323002

Synopsis

The remote host has a program that is affected by a double-free vulnerability.

Description

The version of curl installed on the remote host is 8.15.0 prior to 8.21.0. It is, therefore, affected by a double-free vulnerability:

 - The curl logic that works with SASL authentication could end up cleaning up the GSASL context twice without clearing the pointer in between, making it free() the same pointer twice. (CVE-2026-8925)

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 8.21.0 or later.

See Also

https://curl.se/docs/CVE-2026-8925.html

Plugin Details

Severity: Critical

ID: 323002

File Name: curl_CVE-2026-8925.nasl

Version: 1.1

Type: Local

Agent: windows, macosx, unix

Family: Misc.

Published: 6/26/2026

Updated: 6/26/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Continuous Assessment, Nessus Agent, tenable_cloud_security, tenable_self_hosted_container_security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.0

CVSS v2

Risk Factor: High

Base Score: 7.5

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

CVSS Score Source: CVE-2026-8925

CVSS v3

Risk Factor: Critical

Base Score: 9.8

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

Vulnerability Information

CPE: cpe:/a:haxx:curl

Required KB Items: installed_sw/Curl

Patch Publication Date: 6/24/2026

Vulnerability Publication Date: 6/24/2026

Reference Information

CVE: CVE-2026-8925

IAVA: 2026-A-0627