HTTP Request Smuggling Affecting nodejs24-libs package, versions <1:24.18.1-1.amzn2023.0.2


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.18% (8th percentile)

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  • Snyk IDSNYK-AMZN2023-NODEJS24LIBS-18911815
  • published18 Aug 2026
  • disclosed29 Jul 2026

Introduced: 29 Jul 2026

NewCVE-2026-16728  (opens in a new tab)
CWE-444  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 nodejs24-libs to version 1:24.18.1-1.amzn2023.0.2 or higher.
This issue was patched in ALAS2023-2026-2059.

NVD Description

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

undici's retry interceptor can deliver a response whose body length does not match the Content-Length header exposed to the application after a retry or resume of a partial response. In undici before 6.28.0, from 7.0.0 up to before 7.29.0, and from 8.0.0 up to before 8.9.0, a malicious or faulty upstream can return a partial response with a mismatched framing header, close the socket early, and have the retry interceptor assemble a body of a different length while the original Content-Length stays attached. Applications that use the retry interceptor and forward upstream headers and bodies downstream, such as proxies or gateways, may then emit an invalid HTTP response with a stale Content-Length, leading to downstream response desynchronization, connection hangs, or response corruption. Exploitation requires the retry interceptor enabled, an upstream returning a mismatched partial response, and a downstream forwarder that does not remove or recalculate Content-Length. The issue is fixed in undici 6.28.0, 7.29.0, and 8.9.0.

CVSS Base Scores

version 3.1