Detections
Analytics

Curl 8.11.0 < 8.23.0 HSTS Policy Loss

medium Nessus Plugin ID 371146

Language:

Synopsis

The remote host has a program that is affected by a policy handling vulnerability.

Description

The version of curl installed on the remote host is 8.11.0 prior to 8.23.0. It is, therefore, affected by a policy handling vulnerability:

 - Importing a includeSubDomains parent HSTS entry before a longer-lived child entry, silently drops the child. Consequently, when the parent expires, the child's valid HSTS policy is lost, causing curl to issue unencrypted HTTP requests rather than upgrading to HTTPS. (CVE-2026-87862)

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-2026-87862.html

Plugin Details

Severity: Medium

ID: 371146

File Name: curl_CVE-2026-87862.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: Medium

Base Score: 5.3

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

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-2026-87862

IAVA: 2026-A-1143