Detections
Analytics

Curl 7.46.0 < 8.21.0 Trailing Dot Domain Super Cookie

critical Nessus Plugin ID 323006

Synopsis

The remote host has a program that is affected by a cookie injection vulnerability.

Description

The version of curl installed on the remote host is 7.46.0 prior to 8.21.0. It is, therefore, affected by a cookie injection vulnerability:

 - A flaw in curl's cookie parsing logic allows a malicious HTTP server to set super cookies that bypass the Public Suffix List check. (CVE-2026-8924)

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-2026-8924.html

Plugin Details

Severity: Critical

ID: 323006

File Name: curl_CVE-2026-8924.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: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.0

CVSS v2

Risk Factor: Medium

Base Score: 6.4

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

CVSS Score Source: CVE-2026-8924

CVSS v3

Risk Factor: Critical

Base Score: 9.1

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

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-2026-8924

IAVA: 2026-A-0627