NVD - CVE-2026-1526 (original) (raw)

Initial Analysis by NIST 3/20/2026 11:56:47 AM

Action Type Old Value New Value
Added CPE Configuration OR *cpe:2.3:a:nodejs:undici:*:*:*:*:*:node.js:*:* versions up to (excluding) 6.24.0 *cpe:2.3:a:nodejs:undici:*:*:*:*:*:node.js:*:* versions from (including) 7.0.0 up to (excluding) 7.24.0
Added Reference Type openjs: https://cna.openjsf.org/security-advisories.html Types: Vendor Advisory
Added Reference Type openjs: https://datatracker.ietf.org/doc/html/rfc7692 Types: Technical Description
Added Reference Type openjs: https://github.com/nodejs/undici/security/advisories/GHSA-vrm6-8vpv-qv8q Types: Vendor Advisory
Added Reference Type openjs: https://hackerone.com/reports/3481206 Types: Permissions Required

New CVE Received from openjs 3/12/2026 5:16:23 PM

Action Type Old Value New Value
Added Description The undici WebSocket client is vulnerable to a denial-of-service attack via unbounded memory consumption during permessage-deflate decompression. When a WebSocket connection negotiates the permessage-deflate extension, the client decompresses incoming compressed frames without enforcing any limit on the decompressed data size. A malicious WebSocket server can send a small compressed frame (a "decompression bomb") that expands to an extremely large size in memory, causing the Node.js process to exhaust available memory and crash or become unresponsive. The vulnerability exists in the PerMessageDeflate.decompress() method, which accumulates all decompressed chunks in memory and concatenates them into a single Buffer without checking whether the total size exceeds a safe threshold.
Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Added CWE CWE-409
Added Reference https://cna.openjsf.org/security-advisories.html
Added Reference https://datatracker.ietf.org/doc/html/rfc7692
Added Reference https://github.com/nodejs/undici/security/advisories/GHSA-vrm6-8vpv-qv8q
Added Reference https://hackerone.com/reports/3481206