Detections
Analytics

Curl 7.30.0 < 8.22.0 IMAP Command Injection

high Nessus Plugin ID 371155

Synopsis

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

Description

The version of curl installed on the remote host is 7.30.0 prior to 8.22.0. It is, therefore, affected by a command injection vulnerability:

 - Enabling CURLOPT_CRLF causes curl to advertise the raw input byte count in the IMAP APPEND {N} literal while transmitting line-ending expanded data. The server reads only N bytes for the payload, causing the remaining overflow bytes to be interpreted and executed as pipelined IMAP commands within the authenticated session. (CVE-2026-87864)

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 8.22.0 or later.

See Also

https://curl.se/docs/CVE-2026-87864.html

Plugin Details

Severity: High

ID: 371155

File Name: curl_CVE-2026-87864.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: 58.48

CVSS v3

Risk Factor: High

Base Score: 8.2

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

Vulnerability Information

CPE: cpe:/a:haxx:curl

Required KB Items: installed_sw/Curl

Patch Publication Date: 9/2/2026

Vulnerability Publication Date: 10/14/2026

Reference Information

CVE: CVE-2026-87864

IAVA: 2026-A-1143