SCA: security update for symfony/symfony, symfony/yaml (GHSA-9frc-8383-795m)

high Tenable Self-Hosted Container Security Plugin ID 442398

Description

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

- Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to
5.4.52, 6.4.40, 7.4.12, and 8.0.12, Symfony\Component\Yaml\Parser::cleanup() used regular expressions with
overlapping quantifiers for YAML directive, comment, and document marker cleanup, allowing crafted input
to make parsing hang for an arbitrarily long time. This issue is fixed in versions 5.4.52, 6.4.40, 7.4.12,
and 8.0.12. (CVE-2026-45305)

Solution

Update the symfony/symfony library and its related packages to version 5.4.52 or later.

See Also

https://github.com/advisories/GHSA-9frc-8383-795m

Plugin Details

Severity: High

ID: 442398

Version: Revision 1.5

Type: Local

Family: SCA Checks

Published: 5/28/2026

Updated: 7/16/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.77

Vendor

Vendor Severity: Low

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-45305

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:N/I:N/A:H

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

CVSS v4

Risk Factor: High

Base Score: 8.7

Threat Score: 6.6

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 5/27/2026

Vulnerability Publication Date: 5/27/2026

Reference Information

CVE: CVE-2026-45305