Detections
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SCA: security update for league/commonmark (GHSA-hh8v-hgvp-g3f5)

medium Tenable Self-Hosted Container Security Plugin ID 439041

Description

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

 - league/commonmark is a PHP Markdown parser. From version 2.3.0 to before version 2.8.2, the
 DomainFilteringAdapter in the Embed extension is vulnerable to an allowlist bypass due to a missing
 hostname boundary assertion in the domain-matching regex. An attacker-controlled domain like
 youtube.com.evil passes the allowlist check when youtube.com is an allowed domain. This issue has been
 patched in version 2.8.2. (CVE-2026-33347)

Solution

Update the league/commonmark library and its related packages to version 2.8.2 or later.

See Also

https://github.com/advisories/GHSA-hh8v-hgvp-g3f5

Plugin Details

Severity: Medium

ID: 439041

Version: Revision 1.11

Type: Local

Family: SCA Checks

Published: 3/20/2026

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 2.3

Percentile: 9.42

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

CVSS Score Source: CVE-2026-33347

CVSS v3

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 5.3

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

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

CVSS v4

Risk Factor: Medium

Base Score: 6.3

Threat Score: 1.7

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 3/19/2026

Vulnerability Publication Date: 3/19/2026

Reference Information

CVE: CVE-2026-33347