GHSA-3v7f-55p6-f55p · 深刻度： medium · エコシステム： npm — Picomatch: Method Injection in POSIX Character Classes causes incorrect Glob Matching
Picomatch is a glob matcher written JavaScript. Versions prior to 4.0.4, 3.0.2, and 2.3.2 are vulnerable to a method injection vulnerability affecting the `POSIX_REGEX_SOURCE` object. Because the object inherits from `Object.prototype`, specially crafted POSIX bracket expressions (e.g., `[[:constructor:]]`) can reference inherited method names. These methods are implicitly converted to strings and injected into the generated regular expression. This leads to incorrect glob matching behavior (integrity impact), where patterns may match unintended filenames. The issue does not enable remote code execution, but it can cause security-relevant logic errors in applications that rely on glob matching for filtering, validation, or access control. All users of affected `picomatch` versions that process untrusted or user-controlled glob patterns are potentially impacted. This issue is fixed in picomatch 4.0.4, 3.0.2 and 2.3.2. Users should upgrade to one of these versions or later, depending on their supported release line. If upgrading is not immediately possible, avoid passing untrusted glob patterns to picomatch. Possible mitigations include sanitizing or rejecting untrusted glob patterns, especially those containing POSIX character classes like `[[:...:]]`; avoiding the use of POSIX bracket expressions if user input is involved; and manually patching the library by modifying `POSIX_REGEX_SOURCE` to use a null prototype.
総合評価: CVE-2026-33672 は低リスク（32.9/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 0.41%、32 パーセンタイル） 推奨対応: 悪用情報と EPSS の推移を監視し、必要に応じて優先度を見直してください。
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 | 2026-06-15 | 0.05% | 0.41% | +0.36% |
| 2 | 2026-04-21 | 0.16% | 0.05% | -0.11% |
| 3 | 2026-04-01 | — | 0.16% | — |
EPSS の全履歴 （全 4 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 |
|---|---|---|---|---|---|---|
| 5.3 | 3.1 | MEDIUM |
|
3.9 | 1.4 | [email protected] |
GHSA-3v7f-55p6-f55p · 深刻度： medium · エコシステム： npm — Picomatch: Method Injection in POSIX Character Classes causes incorrect Glob Matching
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2026-33672 not yet assigned priority: Debian including 1 source packages (node-anymatch), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 3, resolved 2. | https://security-tracker.debian.org/tracker/CVE-2026-33672 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2026-33672 |
ubuntu
|
medium | CVE-2026-33672 medium priority: Ubuntu including 1 source packages (node-anymatch), 6 status rows across 6 suites (bionic, focal, jammy, noble, questing, upstream): needs-triage 5, released 1. | https://ubuntu.com/security/CVE-2026-33672 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| jonschlinkert | picomatch | < 2.3.2 | cpe:2.3:a:jonschlinkert:picomatch:*:*:*:*:*:node.js:*:* |
| jonschlinkert | picomatch | >= 3.0.0, < 3.0.2 | cpe:2.3:a:jonschlinkert:picomatch:*:*:*:*:*:node.js:*:* |
| jonschlinkert | picomatch | >= 4.0.0, < 4.0.4 | cpe:2.3:a:jonschlinkert:picomatch:*:*:*:*:*:node.js:*:* |