GHSA-38rv-x7px-6hhq · 深刻度： high · エコシステム： npm — undici WebSocket client vulnerable to denial of service via cumulative fragment bypass
Impact: The undici WebSocket client enforces maxPayloadSize per-frame but does not enforce the cumulative size of fragmented uncompressed messages. A malicious WebSocket server can stream many small fragments that each pass per-frame validation but collectively exceed the configured limit, causing unbounded memory growth in the client process. The result is memory exhaustion and a denial of service. Affected applications are those using the undici WebSocket client (new WebSocket(...)) that can be induced to connect to an attacker-controlled or compromised WebSocket endpoint. This is a regression specific to undici 8.1.0. The 6.25.0 line shipped the equivalent cumulative check from the start and is unaffected. The 7.x line never had the maxPayloadSize feature and is also unaffected. Patches: Upgrade to undici >= 8.5.0. Workarounds: No workaround is available. The fix must be applied through an upgrade.
総合評価: CVE-2026-9675 は中リスク（42/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 0.43%、34 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 | 2026-06-23 | 0.28% | 0.43% | +0.14% |
| 2 | 2026-06-18 | — | 0.28% | — |
EPSS の全履歴 （全 2 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 |
GHSA-38rv-x7px-6hhq · 深刻度： high · エコシステム： npm — undici WebSocket client vulnerable to denial of service via cumulative fragment bypass
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
unimportant | CVE-2026-9675 unimportant priority: Debian including 1 source packages (node-undici), 4 status rows across 4 suites (bookworm, forky, sid, trixie): resolved 4. | https://security-tracker.debian.org/tracker/CVE-2026-9675 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2026-9675 |
ubuntu
|
medium | CVE-2026-9675 medium priority: Ubuntu including 1 source packages (node-undici), 5 status rows across 5 suites (jammy, noble, questing, resolute, upstream): needs-triage 3, DNE 1, not-affected 1. | https://ubuntu.com/security/CVE-2026-9675 |
| URL | タグ |
|---|---|
| https://cna.openjsf.org/security-advisories.html | Vendor Advisory |
| https://github.com/nodejs/undici/security/advisories/GHSA-38rv-x7px-6hhq | Vendor Advisory |