Description
Composer is a dependency Manager for the PHP language. Prior to 2.2.29 and 2.10.2, a Composer package bin entry containing .. path segments can resolve outside the package install directory and cause Composer's binary installation flow to chmod an existing host file to a world-readable and world-executable mode during composer install, update, or require. This issue is fixed in versions 2.2.29 and 2.10.2.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| composer | composer | >= 1.0, < 2.2.29, >= 2.3.0, < 2.10.2 | — |
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 | 2.10.2-1 | — |
| Debian 13 | composer | No fix yet | — |
| Debian 12 | composer | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | composer | No fix yet | — |
| Ubuntu 26.04 LTS | composer | No fix yet | — |
| Ubuntu 25.10 | composer | No fix yet | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 24.04 LTS | composer | No fix yet | — |
| Ubuntu Pro 22.04 LTS | composer | No fix yet | — |
| Ubuntu Pro 20.04 LTS | composer | No fix yet | — |
| Ubuntu Pro 18.04 LTS | composer | No fix yet | — |
| Ubuntu Pro 16.04 LTS | composer | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | composer | 2.10.2-1.hum1 | RHSA-2026:34854 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | php-composer2 | 2.6.4-150600.3.12.1 | SUSE-SU-2026:3105-1 |
| SLES 15 SP6 | php-composer2 | 2.6.4-150600.3.12.1 | SUSE-SU-2026:3105-1 |
| SLES 15 SP5 | php-composer2 | 2.2.30-150400.3.21.1 | SUSE-SU-2026:4589-1, SUSE-SU-2026:4283-1 |
| SLES 15 SP4 | php-composer2 | 2.2.30-150400.3.21.1 | SUSE-SU-2026:4589-1, SUSE-SU-2026:4283-1 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | php-composer2 | 2.8.9-160000.4.1 | SUSE-SU-2026:23138-1, SUSE-SU-2026:23116-1 |
| SLES for SAP 15 SP6 | php-composer2 | 2.6.4-150600.3.12.1 | SUSE-SU-2026:3105-1 |
| SLES for SAP 15 SP5 | php-composer2 | 2.2.30-150400.3.21.1 | SUSE-SU-2026:4589-1, SUSE-SU-2026:4283-1 |
| SLES for SAP 15 SP4 | php-composer2 | 2.2.30-150400.3.21.1 | SUSE-SU-2026:4589-1, SUSE-SU-2026:4283-1 |
| SLES 16.0 | php-composer2 | 2.8.9-160000.4.1 | SUSE-SU-2026:23138-1, SUSE-SU-2026:23116-1 |
| SLE HPC 15 SP5 | php-composer2 | 2.2.30-150400.3.21.1 | SUSE-SU-2026:4589-1, SUSE-SU-2026:4283-1 |
| SLE HPC 15 SP4 | php-composer2 | 2.2.30-150400.3.21.1 | SUSE-SU-2026:4589-1, SUSE-SU-2026:4283-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | php-composer2 | 2.10.2-1.1 | openSUSE-SU-2026:11268-1 |
| openSUSE Leap 16.0 | php-composer2 | 2.8.9-160000.4.1 | openSUSE-SU-2026:21520-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | composer | 2.10.2-1.amzn2023.0.1 | ALAS2023-2026-1941 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Packagist | composer/composer | >= 2.3.0, < 2.10.2 | 2.10.2 | GHSA-gjfg-22fp-rrxx |
| Packagist | composer/composer | >= 1.0.0, < 2.2.29 | 2.2.29 | GHSA-gjfg-22fp-rrxx |
Advisories 10
- SUSE-SU-2026:4589-1 Security update for php-composer2 SUSE / openSUSE Security Updates · Oct 9, 2026
- WID-SEC-2026-2235 Composer: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 8, 2026
- RHSA-2026:34854 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 6, 2026
- SUSE-SU-2026:4283-1 Security update for php-composer2 SUSE / openSUSE Security Updates · Sep 23, 2026
- SUSE-SU-2026:23138-1 Security update for php-composer2 SUSE / openSUSE Security Updates · Aug 14, 2026
- SUSE-SU-2026:23116-1 Security update for php-composer2 SUSE / openSUSE Security Updates · Aug 14, 2026
- openSUSE-SU-2026:21520-1 Security update for php-composer2 SUSE / openSUSE Security Updates · Aug 4, 2026
- ALAS2023-2026-1941 Important: composer security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jul 20, 2026
- SUSE-SU-2026:3105-1 Security update for php-composer2 SUSE / openSUSE Security Updates · Jul 18, 2026
- openSUSE-SU-2026:11268-1 php-composer2-2.10.2-1.1 on GA media SUSE / openSUSE Security Updates · Jul 15, 2026
References
- https://github.com/composer/composer/security/advisories/GHSA-gjfg-22fp-rrxx
- https://github.com/composer/composer/commit/502c6c4f699802d9cf464728b3e8a95674f919a0
- https://github.com/composer/composer/commit/c50b1efd13ebd73f6dca19b31424c5a02bf93cc1
- https://github.com/composer/composer/releases/tag/2.10.2
- https://github.com/composer/composer/releases/tag/2.2.29