CVE-2026-56848

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**.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector : AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://nodejs.org/en/blog/vulnerability/july-2026-security-releases

Configurations

No configuration.

History

23 Oct 2026, 21:10

Type	Values Removed	Values Added
Summary		(es) Un fallo en el manejo de HTTP/2 de Node.js permite que ’nghttp2_session_mem_send()’ sea llamada de forma reentrante mientras ’nghttp2_session_mem_recv()’ se está ejecutando, lo que resulta en un uso después de liberación de la pila. Esta vulnerabilidad afecta a Node.js 26.x, 24.x, y 22.x.

Information

Published : 2026-08-04 17:16

Updated : 2026-10-24 16:10

NVD link : CVE-2026-56848

Mitre link : CVE-2026-56848

CVE.ORG link : CVE-2026-56848

JSON object : View

Products Affected

No product.

CWE

CWE-416

Use After Free

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