GHSA-6rw7-vpxm-498p · 深刻度: medium · エコシステム: npm — qs's arrayLimit bypass in its bracket notation allows DoS via memory exhaustion
Improper Input Validation vulnerability in qs (parse modules) allows HTTP DoS.This issue affects qs: < 6.14.1. Summary The arrayLimit option in qs did not enforce limits for bracket notation (a[]=1&a[]=2), only for indexed notation (a[0]=1). This is a consistency bug; arrayLimit should apply uniformly across all array notations. Note: The default parameterLimit of 1000 effectively mitigates the DoS scenario originally described. With default options, bracket notation cannot produce arrays larger than parameterLimit regardless of arrayLimit, because each a[]=valueconsumes one parameter slot. The severity has been reduced accordingly. Details The arrayLimit option only checked limits for indexed notation (a[0]=1&a[1]=2) but did not enforce it for bracket notation (a[]=1&a[]=2). Vulnerable code (lib/parse.js:159-162): if (root === '[]' && options.parseArrays) { obj = utils.combine([], leaf); // No arrayLimit check } Working code (lib/parse.js:175): else if (index <= options.arrayLimit) { // Limit checked here obj = []; obj[index] = leaf; } The bracket notation handler at line 159 uses utils.combine([], leaf) without validating against options.arrayLimit, while indexed notation at line 175 checks index <= options.arrayLimit before creating arrays. PoC const qs = require('qs'); const result = qs.parse('a[]=1&a[]=2&a[]=3&a[]=4&a[]=5&a[]=6', { arrayLimit: 5 }); console.log(result.a.length); // Output: 6 (should be max 5) Note on parameterLimit interaction: The original advisory's "DoS demonstration" claimed a length of 10,000, but parameterLimit (default: 1000) caps parsing to 1,000 parameters. With default options, the actual output is 1,000, not 10,000. Impact Consistency bug in arrayLimit enforcement. With default parameterLimit, the practical DoS risk is negligible since parameterLimit already caps the total number of parsed parameters (and thus array elements from bracket notation). The risk increases only when parameterLimit is explicitly set to a very high value.
総合評価: CVE-2025-15284 は公開エクスプロイトあり(51.9/100)。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) 根拠: 公開エクスプロイトが 1 件参照されています(Exploit-DB)。 推奨対応: 公開エクスプロイトが確認されています。影響範囲の確認、緩和策の適用、パッチ適用を優先してください。
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。
| EDB-ID | ソース | 種別 | 公開 | リンク |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
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 | 0.04% | 0.41% | +0.37% |
| 2 | 2026-05-27 | 0.06% | 0.04% | -0.02% |
| 3 | 2026-03-21 | — | 0.06% | — |
EPSS の全履歴 (全 7 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 |
|---|---|---|---|---|---|---|
| 6.3 | 4.0 | MEDIUM |
|
— | — | 7ffcee3d-2c14-4c3e-b844-86c6a321a158 |
| 3.7 | 3.1 | LOW |
|
2.2 | 1.4 | 7ffcee3d-2c14-4c3e-b844-86c6a321a158 |
GHSA-6rw7-vpxm-498p · 深刻度: medium · エコシステム: npm — qs's arrayLimit bypass in its bracket notation allows DoS via memory exhaustion
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2025-15284 not yet assigned priority: Debian including 1 source packages (node-qs), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 3, resolved 2. | https://security-tracker.debian.org/tracker/CVE-2025-15284 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2025-15284 |
ubuntu
|
medium | CVE-2025-15284 medium priority: Ubuntu including 1 source packages (node-qs), 9 status rows across 9 suites (bionic, focal, jammy, noble, plucky, questing, trusty, upstream, xenial): needs-triage 7, ignored 1, released 1. | https://ubuntu.com/security/CVE-2025-15284 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| qs_project | qs | < 6.14.1 | cpe:2.3:a:qs_project:qs:*:*:*:*:*:node.js:*:* |
| URL | タグ |
|---|---|
| https://github.com/ljharb/qs/commit/3086902ecf7f088d0d1803887643ac6c03d415b9 | Patch |
| https://github.com/ljharb/qs/security/advisories/GHSA-6rw7-vpxm-498p | Exploit Mitigation Vendor Advisory |