CVE-2026-56848

CVE Enrichment

CVSS: 7.5 HIGH
EPSS: 0.49%
EPSS Percentile: 40.35%
CISA KEV: Not listed

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**.

Technical Details

CVSS Version: 3.0
CNA / NVD Source: support@hackerone.com
Published: 05-Aug-2026 00:16
Last Modified: 04-Sep-2026 00:02
EPSS Date: 2026-10-12
CWE: CWE-416

CVSS Vector


            CVSS:3.0                            AV:N /
                            AC:L /
                            PR:N /
                            UI:N /
                            S:U /
                            C:N /
                            I:N /
                            A:H

References

support@hackerone.com

Last enrichment sync: 13-Oct-2026 00:03
Sources: NVD · FIRST EPSS · CISA KEV
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Reported Context (1)

Since the reports are at different stages of that process, only subsets are publicly disclosed today, such as curl’s CVE-2026-9545 and CVE-2026-13608, Node.js’s CVE-2026-56848, and Linux kernel CVE-2026-64563. Microsoft FORGE Shares Lessons from AI-Assisted Vulnerability Research at Scale

CVE (3)

People (1)

Vendors (1)

Products (4)

Tools (3)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.