GHSA-9f46-5r25-5wfm · 深刻度： critical · エコシステム： composer — Time-of-check Time-of-use (TOCTOU) Race Condition in league/flysystem
Flysystem is an open source file storage library for PHP. The whitespace normalisation using in 1.x and 2.x removes any unicode whitespace. Under certain specific conditions this could potentially allow a malicious user to execute code remotely. The conditions are: A user is allowed to supply the path or filename of an uploaded file, the supplied path or filename is not checked against unicode chars, the supplied pathname checked against an extension deny-list, not an allow-list, the supplied path or filename contains a unicode whitespace char in the extension, the uploaded file is stored in a directory that allows PHP code to be executed. Given these conditions are met a user can upload and execute arbitrary code on the system under attack. The unicode whitespace removal has been replaced with a rejection (exception). For 1.x users, upgrade to 1.1.4. For 2.x users, upgrade to 2.1.1.
総合評価: CVE-2021-32708 は高リスク（66/100）。CVSS 深刻度は重大。悪用される可能性が高い（EPSS 3.49%、88 パーセンタイル） 推奨対応: 悪用可能性が高いため、影響範囲の確認と修補の優先付けを推奨します。
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 | 2026-06-15 | 7.33% | 3.49% | -3.84% |
| 2 | 2026-03-04 | 7.51% | 7.33% | -0.19% |
| 3 | 2026-03-01 | — | 7.51% | — |
EPSS の全履歴 （全 51 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 |
|---|---|---|---|---|---|---|
| 9.8 | 3.1 | CRITICAL |
|
3.9 | 5.9 | [email protected] |
| 8.1 | 3.1 | HIGH |
|
2.2 | 5.9 | [email protected] |
| 9.3 | 2.0 | HIGH |
|
8.6 | 10.0 | [email protected] |
GHSA-9f46-5r25-5wfm · 深刻度： critical · エコシステム： composer — Time-of-check Time-of-use (TOCTOU) Race Condition in league/flysystem
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2021-32708 not yet assigned priority: Debian including 1 source packages (php-league-flysystem), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2021-32708 |
ubuntu
|
medium | CVE-2021-32708 medium priority: Ubuntu including 1 source packages (php-league-flysystem), 16 status rows across 16 suites (bionic, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): ignored 7, needs-triage 5, DNE 4. | https://ubuntu.com/security/CVE-2021-32708 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| thephpleague | flysystem | >= 1.0.0, < 1.1.4 | cpe:2.3:a:thephpleague:flysystem:*:*:*:*:*:*:*:* |
| thephpleague | flysystem | >= 2.0.0, < 2.1.1 | cpe:2.3:a:thephpleague:flysystem:*:*:*:*:*:*:*:* |
| fedoraproject | fedora | 33 | cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* |
| fedoraproject | fedora | 34 | cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* |