ChangeIntel IT change radar

Public mode

No access to your tenant or devices. Every item links to its source. What this means

CVE-2026-2581

undici · Vulnerability

CVSS 3.1 5.9 MEDIUMCheck source for fixed versionsKEV status unknown

Original advisory

Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.

cve-program · CVE-2026-2581

Published

This is an uncontrolled resource consumption vulnerability (CWE-400) that can lead to Denial of Service (DoS). In vulnerable Undici versions, when interceptors.deduplicate() is enabled, response data for deduplicated requests could be accumulated in memory for downstream handlers. An attacker-controlled or untrusted upstream endpoint can exploit this with large/chunked responses and concurrent identical requests, causing high memory usage and potential OOM process termination. Impacted users are applications that use Undici’s deduplication interceptor against endpoints that may produce large or long-lived response bodies. PatchesThe issue has been patched by changing deduplication behavior to stream response chunks to downstream handlers as they arrive (instead of full-body accumulation), and by preventing late deduplication when body streaming has already started. Users should upgrade to the first official Undici (and Node.js, where applicable) releases that include this patch.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-2581

Published

undici

https://github.com/nodejs/undici/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "undici",
                    "product": "undici",
                    "collectionURL": "https://github.com/nodejs/undici/",
                    "packageName": "undici",
                    "repo": "https://github.com/nodejs/undici/",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "< 6.24.0; 7.0.0 < 7.24.0"
                        },
                        {
                            "status": "unaffected",
                            "version": "6.24.0: 7.24.0"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Original source record · Cite this exact observation · Complete original publisher JSON