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GO-2026-6539

nginx ignition has ParseAcceptLanguage `_` separator bypass that enables ~75x CPU amplification via Accept-Language header in i18nMiddleware in github.com/lucasdillmann/nginx-ignition

Quick fix

GO-2026-6539 — github.com/lucasdillmann/nginx-ignition: upgrade to the fixed version with the command below.

go get github.com/lucasdillmann/nginx-ignition@v0.0.0-20260526022344-0c988fc1277c

Details

nginx ignition has ParseAcceptLanguage `_` separator bypass that enables ~75x CPU amplification via Accept-Language header in i18nMiddleware in github.com/lucasdillmann/nginx-ignition

Are you affected?

Enter the version of the package you're using.

Affected packages

Go/github.com/lucasdillmann/nginx-ignition
Introduced in: 0.0.0-20260126024607-cbaf0fc16ed8Fixed in: 0.0.0-20260526022344-0c988fc1277c
Fixgo get github.com/lucasdillmann/nginx-ignition@v0.0.0-20260526022344-0c988fc1277c

References