Description
Composer is a dependency Manager for the PHP language. In affected versions several files within the local working directory are included during the invocation of Composer and in the context of the executing user. As such, under certain conditions arbitrary code execution may lead to local privilege escalation, provide lateral user movement or malicious code execution when Composer is invoked within a directory with tampered files. All Composer CLI commands are affected, including composer.phar's self-update. The following scenarios are of high risk: Composer being run with sudo, Pipelines which may execute Composer on untrusted projects, Shared environments with developers who run Composer individually on the same project. This vulnerability has been addressed in versions 2.7.0 and 2.2.23. It is advised that the patched versions are applied at the earliest convenience. Where not possible, the following should be addressed: Remove all sudo composer privileges for all users to mitigate root privilege escalation, and avoid running Composer within an untrusted directory, or if needed, verify that the contents of `vendor/composer/InstalledVersions.php` and `vendor/composer/installed.php` do not include untrusted code. A reset can also be done on these files by the following:```sh
rm vendor/composer/installed.php vendor/composer/InstalledVersions.php
composer install --no-scripts --no-plugins
```
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| composer | composer | >= 2.0, < 2.2.23, >= 2.3, < 2.7 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | composer | 2.7.1-1 | — |
| Debian 13 | composer | 2.7.1-1 | — |
| Debian 12 | composer | 2.5.5-1+deb12u1 | DSA-5632-1 |
| Debian 11 | composer | 2.0.9-2+deb11u2 | DSA-5632-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 24.04 LTS | composer | 2.7.1-2ubuntu0.1~esm1 | USN-7603-1 |
| Ubuntu Pro 22.04 LTS | composer | 2.2.6-2ubuntu4+esm1 | USN-7603-1 |
| Ubuntu Pro 20.04 LTS | composer | 1.10.1-1ubuntu0.1~esm2 | USN-7603-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | composer | 1.6.3-1ubuntu0.1~esm2 | USN-7603-1 |
| Ubuntu Pro 16.04 LTS | composer | 1.0.0~beta2-1ubuntu0.1~esm2 | USN-7603-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | php-composer2 | 2.2.3-150400.3.9.1 | SUSE-SU-2024:0592-1 |
| SLES 15 SP4 | php-composer2 | 2.2.3-150400.3.9.1 | SUSE-SU-2024:0592-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP4 | php-composer2 | 2.2.3-150400.3.9.1 | SUSE-SU-2024:0592-1 |
| SLE HPC 15 SP4 | php-composer2 | 2.2.3-150400.3.9.1 | SUSE-SU-2024:0592-1 |
| SUSE Manager Server 4.3 | php-composer2 | 2.2.3-150400.3.9.1 | SUSE-SU-2024:0592-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | php-composer2 | 2.7.1-1.1 | openSUSE-SU-2024:13681-1 |
| openSUSE Leap 15.5 | php-composer2 | 2.2.3-150400.3.9.1 | SUSE-SU-2024:0592-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | composer | 2.7.0-r0 | — |
| Alpine v3.23 | composer | 2.7.0-r0 | — |
| Alpine v3.22 | composer | 2.7.0-r0 | — |
| Alpine v3.21 | composer | 2.7.0-r0 | — |
| Alpine v3.20 | composer | 2.7.0-r0 | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | composer | 2.7.0-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | composer | 2.5.8-2.amzn2023.0.2 | ALAS2023-2024-539 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Packagist | composer/composer | >= 2.0.0-alpha1, < 2.2.23 | 2.2.23 | GHSA-7c6p-848j-wh5h |
| Packagist | composer/composer | >= 2.3.0-rc1, < 2.7.0 | 2.7.0 | GHSA-7c6p-848j-wh5h |
Advisories 6
- WID-SEC-2026-4047 Snipe-IT: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 4, 2026
- USN-7603-1 composer vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- DSA-5632-1 composer - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2024:0592-1 Security update for php-composer2 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13681-1 php-composer2-2.7.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- ALAS2023-2024-539 Important: composer security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Mar 5, 2024