Detections
Analytics

Echo: postcss: security update to 8.5.18

high Tenable Cloud Security Plugin ID 463932

Description

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

 - PostCSS takes a CSS file and provides an API to analyze and modify its rules by transforming the rules
 into an Abstract Syntax Tree. Prior to 8.5.18, lib/previous-map.js loadMap() passes attacker-controlled
 sourceMappingURL values to join(dirname(opts.from), annotation), and loadFile() permits traversed or
 absolute .map paths, allowing untrusted CSS processed without map: false to disclose sourcesContent from
 arbitrary reachable .map files through result.map. This issue is fixed in version 8.5.18. (CVE-2026-73646)

Solution

Update the postcss library and its related packages to version 8.5.18 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-73646

Plugin Details

Severity: High

ID: 463932

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/3/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 93.18

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-73646

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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: 9/28/2026

Vulnerability Publication Date: 7/24/2026

Reference Information

CVE: CVE-2026-73646