CVE-2026-1526
EUVD-2026-1169912.03.2026, 21:16
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.
Affected Products (NVD)
| Vendor | Product | Version |
|---|---|---|
| nodejs | undici | 𝑥 < 6.24.0 |
| nodejs | undici | 7.0.0 ≤ 𝑥 < 7.24.0 |
𝑥
= Vulnerable software versions
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
| Vendor | Product | Version | Source |
|---|---|---|---|
| Red Hat | Cryostat 4 on RHEL 9 | 4.2.0-9 ≤ 𝑥 < * | ADP |
| Red Hat | Cryostat 4 on RHEL 9 | 4.2.0-9 ≤ 𝑥 < * | ADP |
| Red Hat | Red Hat Enterprise Linux 10 | 1:22.22.2-1.el10_1 ≤ 𝑥 < * | ADP |
| Red Hat | Red Hat Enterprise Linux 10 | 1:24.14.1-2.el10_1 ≤ 𝑥 < * | ADP |
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | 1:22.22.2-2.el10_0 ≤ 𝑥 < * | ADP |
| Red Hat | Red Hat Enterprise Linux 8 | 8100020260331102257.6d880403 ≤ 𝑥 < * | ADP |
| Red Hat | Red Hat Enterprise Linux 8 | 8100020260408131901.6d880403 ≤ 𝑥 < * | ADP |
| Red Hat | Red Hat Enterprise Linux 9 | 9070020260401095228.rhel9 ≤ 𝑥 < * | ADP |
| Red Hat | Red Hat Enterprise Linux 9 | 9070020260402152654.rhel9 ≤ 𝑥 < * | ADP |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | 9060020260409121057.rhel9 ≤ 𝑥 < * | ADP |
| Red Hat | Cluster Observability Operator 1.5.0 | 1782839279 ≤ 𝑥 < * | ADP |
| Red Hat | Cluster Observability Operator 1.5.0 | 1782840539 ≤ 𝑥 < * | ADP |
| Red Hat | Cluster Observability Operator 1.5.0 | 1782839996 ≤ 𝑥 < * | ADP |
| Red Hat | Red Hat Developer Hub 1.8 | 1776784286 ≤ 𝑥 < * | ADP |
| Red Hat | Red Hat Developer Hub 1.9 | 1777903262 ≤ 𝑥 < * | ADP |
| Red Hat | Red Hat OpenShift AI 2.16 | 1774282136 ≤ 𝑥 < * | ADP |
| Red Hat | Red Hat OpenShift Dev Spaces 3.28 | 1779814592 ≤ 𝑥 < * | ADP |
| Red Hat | Red Hat OpenShift Pipelines 1.2 | 1779910201 ≤ 𝑥 < * | ADP |
Debian Releases
Ubuntu Releases
Amazon Linux Releases
Amazon Package | |||
|---|---|---|---|
| nodejs20 |
| ||
| nodejs20-debuginfo |
| ||
| nodejs20-debugsource |
| ||
| nodejs20-devel |
| ||
| nodejs20-docs |
| ||
| nodejs20-full-i18n |
| ||
| nodejs20-libs |
| ||
| nodejs20-libs-debuginfo |
| ||
| nodejs20-npm |
| ||
| nodejs22 |
| ||
| nodejs22-debuginfo |
| ||
| nodejs22-debugsource |
| ||
| nodejs22-devel |
| ||
| nodejs22-docs |
| ||
| nodejs22-full-i18n |
| ||
| nodejs22-libs |
| ||
| nodejs22-libs-debuginfo |
| ||
| nodejs22-npm |
| ||
| nodejs24 |
| ||
| nodejs24-debuginfo |
| ||
| nodejs24-debugsource |
| ||
| nodejs24-devel |
| ||
| nodejs24-docs |
| ||
| nodejs24-full-i18n |
| ||
| nodejs24-libs |
| ||
| nodejs24-libs-debuginfo |
| ||
| nodejs24-npm |
| ||
| v8-11.3-devel |
| ||
| v8-12.4-devel |
| ||
| v8-13.6-devel |
|
Common Weakness Enumeration
- CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)The software does not handle or incorrectly handles a compressed input with a very high compression ratio that produces a large output.
- CWE-770 - Allocation of Resources Without Limits or ThrottlingThe software allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.
References