Improper Handling of Highly Compressed Data (Data Amplification) Affecting nodejs24-debugsource package, versions <1:24.21.0-1.amzn2023.0.1


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.41% (33rd percentile)

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  • Snyk IDSNYK-AMZN2023-NODEJS24DEBUGSOURCE-20245761
  • published29 Sept 2026
  • disclosed4 Sept 2026

Introduced: 4 Sep 2026

CVE-2026-84890  (opens in a new tab)
CWE-409  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 nodejs24-debugsource to version 1:24.21.0-1.amzn2023.0.1 or higher.
This issue was patched in ALAS2023-2026-3107.

NVD Description

Note: Versions mentioned in the description apply only to the upstream nodejs24-debugsource package and not the nodejs24-debugsource package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

undici's decompress interceptor decompresses response bodies according to the untrusted Content-Encoding header. While the number of content-encoding layers is capped, the total decompressed output size is unbounded and there is no configuration option to limit it. A malicious or faulty upstream can therefore return a small compressed payload, a compression bomb, that expands to hundreds of megabytes or more in client memory, an asymmetric resource consumption that can exhaust memory and crash the process. This affects undici versions from 7.15.0 up to 7.29.1 and from 8.0.0 up to 8.10.2. Users should upgrade to undici 7.29.1 or 8.10.2.

CVSS Base Scores

version 3.1