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CVE-2026-56848

Quick assessment

Affected
nodejs node
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Node.js是Node.js基金会开源的一个跨平台的 JavaScript 运行时环境。 Node.js 26.5.0及之前版本、24.18.0及之前版本和22.23.1及之前版本存在资源管理错误漏洞，该漏洞源于HTTP/2处理缺陷，允许在执行nghttp2_session_mem_recv()时重入调用nghttp2_session_mem_send()，导致堆释放后重用，可能造成拒绝服务。

AI Predicted 7.5 Difficulty: Hard EPSS 0.49% · P40

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 3

VendorProduct Version RangeStatus
nodejs node 26.5.0≤ 26.5.0 affected
24.18.0≤ 24.18.0 affected
22.23.1≤ 22.23.1 affected
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I. Basic Information for CVE-2026-56848

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw in Node.js HTTP/2 handling allows `nghttp2_session_mem_send()` to be called re-entrantly while `nghttp2_session_mem_recv()` is executing, resulting in a heap-use-after-free. This vulnerability affects Node.js **26.x**, **24.x**, and **22.x**.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
Node.js 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Node.js是Node.js基金会开源的一个跨平台的 JavaScript 运行时环境。 Node.js 26.5.0及之前版本、24.18.0及之前版本和22.23.1及之前版本存在资源管理错误漏洞，该漏洞源于HTTP/2处理缺陷，允许在执行nghttp2_session_mem_recv()时重入调用nghttp2_session_mem_send()，导致堆释放后重用，可能造成拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
nodejs node 26.5.0 ~ 26.5.0 -

II. Public POCs for CVE-2026-56848

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III. Intelligence Information for CVE-2026-56848

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Security Blog Posts for CVE-2026-56848 (1)

Same Patch Batch · nodejs · 2026-08-04 · 6 CVEs total

CVE-2026-58045 nodejs node 资源管理错误漏洞
CVE-2026-58041 Node.js 竞争条件问题漏洞
CVE-2026-58042 nodejs node 资源管理错误漏洞
CVE-2026-58044 nodejs node 输入验证错误漏洞
CVE-2026-56846 Node.js 资源管理错误漏洞

IV. Related Vulnerabilities

Same product: node
Same vendor: nodejs
Same weakness: CWE-416

V. Comments for CVE-2026-56848

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