ALAS2023-2026-3136: composer security update

ALAS2023-2026-3136, released September 28, 2026, fixes 2 CVEs in composer (version 2.10.3-1.amzn2023.0.1). None of them is reported as exploited. Patch Radar priority: High.

High

CVEs closed

None rated Critical

Exploited

None reported

Highest CVSS

6.1

Base score, 0 to 10

Highest EPSS

0.0050

43rd percentile

Priority of the 2 CVEs

Patch now 0
                                Urgent 0
                                High 1
                                Routine 1

Fixed package versions

Product	Release	Fixed in
composer	amzn 2023	2.10.3-1.amzn2023.0.1

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
High	CVE-2026-84361	composer: Composer is a dependency Manager for the PHP language	n/a	0.0050	None reported
Routine	CVE-2026-59944	composer: Composer is a dependency Manager for the PHP language	6.1	0.0047	None reported

Also fixes CVE-2026-84361

SUSE-SU-2026:4059-1
php-composer2 on sles 15.6, sles 15.7
SUSE-SU-2026:23635-1
php-composer2 on sles 16.0
OPENSUSE-SU-2026:21778-1
php-composer2 on opensuse-leap 16.0
DEBIAN-CVE-2026-84361
composer on Debian 14

Vendor advisory

https://alas.aws.amazon.com/AL2023/ALAS-2026-3136.html

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