GHSA-v9p9-hfj2-hcw8 · 深刻度: high · エコシステム: npm — Undici has Unhandled Exception in WebSocket Client Due to Invalid server_max_window_bits Validation
ImpactThe undici WebSocket client is vulnerable to a denial-of-service attack due to improper validation of the server_max_window_bits parameter in the permessage-deflate extension. When a WebSocket client connects to a server, it automatically advertises support for permessage-deflate compression. A malicious server can respond with an out-of-range server_max_window_bits value (outside zlib's valid range of 8-15). When the server subsequently sends a compressed frame, the client attempts to create a zlib InflateRaw instance with the invalid windowBits value, causing a synchronous RangeError exception that is not caught, resulting in immediate process termination. The vulnerability exists because: * The isValidClientWindowBits() function only validates that the value contains ASCII digits, not that it falls within the valid range 8-15 * The createInflateRaw() call is not wrapped in a try-catch block * The resulting exception propagates up through the call stack and crashes the Node.js process
総合評価: CVE-2026-2229 は中リスク(49.4/100)。CVSS 深刻度は高。悪用される可能性が高い(EPSS 0.87%、54 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 | 0.49% | 0.87% | +0.39% |
| 2 | 2026-06-15 | 0.19% | 0.49% | +0.30% |
| 3 | 2026-03-21 | — | 0.19% | — |
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 |
|---|---|---|---|---|---|---|
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | ce714d77-add3-4f53-aff5-83d477b104bb |
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c |
GHSA-v9p9-hfj2-hcw8 · 深刻度: high · エコシステム: npm — Undici has Unhandled Exception in WebSocket Client Due to Invalid server_max_window_bits Validation
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2026-2229: 1 source package rows (nodejs); 10 state rows across 5 repos (3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 0, open 10. | https://security.alpinelinux.org/vuln/CVE-2026-2229 |
debian
|
not yet assigned | CVE-2026-2229 not yet assigned priority: Debian including 1 source packages (node-undici), 4 status rows across 4 suites (bookworm, forky, sid, trixie): open 2, resolved 2. | https://security-tracker.debian.org/tracker/CVE-2026-2229 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2026-2229 |
ubuntu
|
medium | CVE-2026-2229 medium priority: Ubuntu including 1 source packages (node-undici), 4 status rows across 4 suites (jammy, noble, questing, upstream): needs-triage 3, DNE 1. | https://ubuntu.com/security/CVE-2026-2229 |