CVE-2024-24821: Composer is a dependency Manager for the PHP language

Routine

HIGH 8.8UPGRADE

CVE-2024-24821 is a high-severity flaw (CVSS 8.8) affecting composer. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 C

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 80%)
CISA exploited list	No
Weakness	CWE-829
Published	2024-02-09
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: getcomposer

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-02-09 00:15 UTCPublished CVE record published
2026-06-17 07:14 UTCUpdated Record last modified

getcomposer composer UPGRADE

Affected: >= 2.0.0 and < 2.2.23 · >= 2.3.0 and < 2.7.0

Fixed in: 2.2.23, 2.7.0

Safe to downgrade to: a release before 2.0.0

1. Check installed version

apt-cache policy composer || rpm -q composer || composer --version

2. UPGRADE to 2.2.23 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade composer

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade composer

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 2.0.0 (Debian / Ubuntu)

apt-cache madison composer sudo apt install composer=<VERSION_BEFORE_2.0.0> sudo apt-mark hold composer

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list composer sudo dnf downgrade composer-<VERSION_BEFORE_2.0.0> sudo dnf versionlock add composer

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-24821?

composer: upgrade to 2.2.23, 2.7.0. Exact commands for each OS are on this page.

Is CVE-2024-24821 being exploited?

CVE-2024-24821 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-24821 affect?

CVE-2024-24821 affects composer. Severity is high (CVSS 8.8). 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 con

How urgent is CVE-2024-24821?

Priority 36/100. High severity

Software pages

PHP vulnerabilities

Related CVEs

CVE-2026-40261 HIGH 8.8 UPGRADE Composer is a dependency manager for PHP
CVE-2026-40176 HIGH 7.8 UPGRADE Composer is a dependency manager for PHP
CVE-2025-67746 MEDIUM 4.3 UPGRADE Composer is a dependency manager for PHP
CVE-2025-3510 MEDIUM 6.4 UPGRADE The tagDiv Composer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via multiple shortcodes
CVE-2023-43655 MEDIUM 6.4 UPGRADE MITIGATE Composer is a dependency manager for PHP

References

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