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SCA: security update for css_parser (GHSA-ff6c-w6qf-7xqc)

medium Tenable Self-Hosted Container Security Plugin ID 441466

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - css_parser is a Ruby CSS parser. Prior to 2.1.0 and 1.22.0, the CSS Parser gem does not validate HTTPS
 connections, allowing a Man-in-the-Middle (MITM) attacker to inject or modify CSS content when stylesheets
 are loaded via HTTPS. The connection is established with OpenSSL::SSL::VERIFY_NONE, meaning any HTTPS
 certificate—even entirely untrusted—will be accepted without validation. This vulnerability is fixed in
 2.1.0 and 1.22.0. (CVE-2026-44312)

Solution

Update the css_parser library and its related packages to version 1.22.0 or later.

See Also

https://github.com/advisories/GHSA-ff6c-w6qf-7xqc

Plugin Details

Severity: Medium

ID: 441466

Version: Revision 1.7

Type: Local

Family: SCA Checks

Published: 5/7/2026

Updated: 6/30/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2026-44312

CVSS v3

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 5.1

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 5/7/2026

Vulnerability Publication Date: 5/7/2026

Reference Information

CVE: CVE-2026-44312