GHSA-gqw4-4w2p-838q · 深刻度： high · エコシステム： composer — Composer has a command injection via malicious perforce reference
Composer is a dependency manager for PHP. Versions 1.0 through 2.2.26 and 2.3 through 2.9.5 contain a command injection vulnerability in the Perforce::syncCodeBase() method, which appends the $sourceReference parameter to a shell command without proper escaping, and additionally in the Perforce::generateP4Command() method as in GHSA-wg36-wvj6-r67p / CVE-2026-40176, which interpolates user-supplied Perforce connection parameters (port, user, client) from the source url field without proper escaping. An attacker can inject arbitrary commands through crafted source reference or source url values containing shell metacharacters, even if Perforce is not installed. Unlike CVE-2026-40176, the source reference and url are provided as part of package metadata, meaning any compromised or malicious Composer repository can serve package metadata declaring perforce as a source type with malicious values. This vulnerability is exploitable when installing or updating dependencies from source, including the default behavior when installing dev-prefixed versions. This issue has been fixed in Composer 2.2.27 (2.2 LTS) and 2.9.6 (mainline). If developers are unable to immediately update, they can avoid installing dependencies from source by using --prefer-dist or the preferred-install: dist config setting, and only use trusted Composer repositories as a workaround.
総合評価: CVE-2026-40261 は中リスク（61.6/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 1.69%、74 パーセンタイル） 推奨対応: 影響資産を整理し、修補計画に組み込んでください。
リスクは変動します。再評価に基づき、本ページの表示内容を更新しています。
EPSS は日次で悪用されやすさの相対度合いを推定します。パーセンタイルは採点済み CVE の中での相対位置（高いほど相対的に深刻）を示します。
| # | 日付 | 旧 EPSS スコア | 新 EPSS スコア | Δ（新 − 旧） |
|---|---|---|---|---|
| 1 | 2026-06-30 | 1.26% | 1.69% | +0.43% |
| 2 | 2026-06-15 | 0.04% | 1.26% | +1.21% |
| 3 | 2026-06-08 | — | 0.04% | — |
EPSS の全履歴 （全 5 件）
この CVE の CVSS 指標。
| ベーススコア | バージョン | 深刻度 | ベクトル | 悪用しやすさ | 影響 | スコアの出典 |
|---|---|---|---|---|---|---|
| 8.8 | 3.1 | HIGH |
|
2.8 | 5.9 | [email protected] |
| 8.8 | 3.1 | HIGH |
|
2.8 | 5.9 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c |
GHSA-gqw4-4w2p-838q · 深刻度： high · エコシステム： composer — Composer has a command injection via malicious perforce reference
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2026-40261: 1 source package rows (composer); 2 state rows across 2 repos (3.23-community, edge-community); fixed 2, open 0. | https://security.alpinelinux.org/vuln/CVE-2026-40261 |
debian
|
not yet assigned | CVE-2026-40261 not yet assigned priority: Debian including 1 source packages (composer), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 4, open 1. | https://security-tracker.debian.org/tracker/CVE-2026-40261 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2026-40261 |
suse
|
high | — | https://www.suse.com/security/cve/CVE-2026-40261/ |
ubuntu
|
medium | CVE-2026-40261 medium priority: Ubuntu including 1 source packages (composer), 8 status rows across 8 suites (bionic, focal, jammy, noble, questing, resolute, upstream, xenial): needs-triage 7, released 1. | https://ubuntu.com/security/CVE-2026-40261 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| getcomposer | composer | >= 1.0.0, <= 2.2.26 | cpe:2.3:a:getcomposer:composer:*:*:*:*:*:*:*:* |
| getcomposer | composer | >= 2.3.0, <= 2.9.5 | cpe:2.3:a:getcomposer:composer:*:*:*:*:*:*:*:* |