CVE-2026-54272 (MEDIUM): detected in Lambda Docker Images.

[the-lambda-watchdog]

CVE Details

CVE ID	Severity	Affected Package	Installed Version	Fixed Version	Date Published	Date of Scan
CVE-2026-54272	MEDIUM	ip-address	10.2.0	10.2.1	2026-07-27T18:16:56.41Z	2026-08-04T10:19:08.862184301Z

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Affected Docker Images

Image Name	SHA
public.ecr.aws/lambda/nodejs:latest	public.ecr.aws/lambda/nodejs@sha256:fe69820efd000f4a6a34af1fc61ad476e8266f14fa8ebde7688564efba67a2df
public.ecr.aws/lambda/nodejs:24	public.ecr.aws/lambda/nodejs@sha256:fe69820efd000f4a6a34af1fc61ad476e8266f14fa8ebde7688564efba67a2df

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Description

ip-address is a library for parsing and manipulating IPv4 and IPv6 addresses in JavaScript. Versions 10.1.1 through 10.2.0 are vulnerable to SSRF through misclassification of IPv4-mapped/NAT64 IPv6 addresses. Address6.getType() classifies an address by matching it against a table of known IPv6 special-use prefixes, returning Global unicast when nothing matches. That table had no entry for the IPv4-mapped range (::ffff:0:0/96), so every mapped address fell through to Global unicast; NAT64 addresses matched their own NAT64 … labels. The boolean checks isLoopback, isUnspecified, and isMulticast compared getType() against a fixed label and so returned false, while isLinkLocal and isULA checked only the native IPv6 ranges. The library already exposed isMapped4() and to4(), but did not apply them inside these checks, so a mapped or NAT64 address was never normalized to its embedded IPv4 address before classification. For IPv4-mapped addresses the host OS routes to the IPv4 stack, so the misclassification is reachable on any dual-stack host. For NAT64, the classification bypass is unconditional but end-to-end reachability additionally requires a NAT64/DNS64 gateway in the deployment network.This issue has been fixed in version 10.2.1.

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Remediation Steps

• Update the affected package ip-address from version 10.2.0 to 10.2.1.

About this issue

• This issue may not contain all the information about the CVE nor the images it affects.
• This issue will not be updated with new information and the list of affected images may have changed since the creation of this issue.
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• This issue was created automatically by Lambda Watchdog.