CVE-2026-21637
nodejs - security update
描述
A flaw in Node.js TLS error handling allows remote attackers to crash or exhaust resources of a TLS server when `pskCallback` or `ALPNCallback` are in use. Synchronous exceptions thrown during these callbacks bypass standard TLS error handling paths (tlsClientError and error), causing either immediate process termination or silent file descriptor leaks that eventually lead to denial of service. Because these callbacks process attacker-controlled input during the TLS handshake, a remote client can repeatedly trigger the issue. This vulnerability affects TLS servers using PSK or ALPN callbacks across Node.js versions where these callbacks throw without being safely wrapped.
如何修補 CVE-2026-21637
要修補 CVE-2026-21637,請將受影響套件升級到下列已修補版本。
- —升級至 22.22.2-r0 或更新版本
- —升級至 20.20.0 或更新版本
- —升級至 20.20.0 或更新版本
- —升級至 12.22.12~dfsg-1~deb11u8 或更新版本
- —升級至 20.19.2+dfsg-1+deb13u2 或更新版本
CVE-2026-21637 正在被利用嗎?
低 — EPSS 為 1.1%,目前沒有觀察到大規模利用活動。
受影響套件(5)
- from 0, < 22.22.2-r0
- from 0, < 20.20.0, >= 21.0.0, < 22.22.0, >= 23.0.0, < 24.13.0, >= 25.0.0, < 25.3.0
- from 0, < 20.20.0, >= 21.0.0, < 22.22.0, >= 23.0.0, < 24.13.0, >= 25.0.0, < 25.3.0
- from 0, < 12.22.12~dfsg-1~deb11u8
- from 0, < 20.19.2+dfsg-1+deb13u2
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |