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CVE PROGRAM SOURCE RECORD7.5 High

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.

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Status
Published
Published
Updated
Assigning organization
hackerone

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**.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

nodejs node

Default version status: unaffected

  • 26.5.0 to ≤ 26.5.0affected
  • 24.18.0 to ≤ 24.18.0affected
  • 22.23.1 to ≤ 22.23.1affected

References