CVE-2026-54696 (LOW): 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-2026-54696	LOW	json	2.18.0	>= 2.19.9	2026-06-30T23:17:28.123Z	2026-07-06T10:19:04.101278479Z

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Affected Docker Images

Image Name	SHA
public.ecr.aws/lambda/ruby:latest	public.ecr.aws/lambda/ruby@sha256:4900e20f60279c1ac02628047bdf636baf2f308ba37a584446912faff3679457
public.ecr.aws/lambda/ruby:4.0	public.ecr.aws/lambda/ruby@sha256:4900e20f60279c1ac02628047bdf636baf2f308ba37a584446912faff3679457
public.ecr.aws/lambda/ruby:3.4	public.ecr.aws/lambda/ruby@sha256:376376109f53903274d4efa136306eb89775c286634a55adadb40c40606da6ef

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Description

Ruby JSON is a JSON implementation for Ruby. Versions 2.9.0 through 2.19.8 are vulnerable to heap buffer overflow when the JSON generator is provided with an oversized streamed object. When streaming to an IO JSON.dump(obj, io) and JSON::State#generate(obj, io) can write past the internal JSON generator buffer when a streamed object contains an
attacker-controlled string near 16 KB. Exploitation would result in a reliable process crash/denial of service. This issue has been fixed in version 2.19.9.

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Remediation Steps

• Update the affected package json from version 2.18.0 to >= 2.19.9.

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.