A flaw in Node.js HTTP request handling causes an uncaught `TypeError` when a request is received with a header named `__proto__` and the application accesses `req.headersDistinct`. When this occurs, `dest["__proto__"]` resolves to `Object.prototype` rather than `undefined`, causing `.push()` to be called on a non-array. This exception is thrown synchronously inside a property getter and cannot be intercepted by `error` event listeners, meaning it cannot be handled without wrapping every `req.headersDistinct` access in a `try/catch`. * This vulnerability affects all Node.js HTTP servers on **20.x, 22.x, 24.x, and v25.x**
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade nodejs-nodemonUpgrade npmUpgrade nodejs-full-i18nUpgrade v8-12.4-develUpgrade v8-13.6-develUpgrade nodejs-packaging-bundlerUpgrade nodejs-docsUpgrade nodejsUpgrade nodejs-libsUpgrade nodejs-packagingUpgrade nodejs-devel | Apr 16, 2026 | Apr 8, 2026 |
| Alpine Linux | — | Upgrade nodejs | Mar 31, 2026 | Mar 30, 2026 |
| Amazon_linux_2023 | — | Upgrade nodejs22-docsUpgrade nodejs22-full-i18nUpgrade nodejs24-debugsourceUpgrade nodejs22-debuginfoUpgrade nodejs24Upgrade nodejs22Upgrade nodejs20-libsUpgrade nodejs24-full-i18nUpgrade v8-13.6-develUpgrade nodejs20-docsUpgrade nodejs20-debugsourceUpgrade nodejs22-debugsourceUpgrade nodejs24-docsUpgrade nodejs22-develUpgrade nodejs20-libs-debuginfoUpgrade v8-12.4-develUpgrade nodejs20-develUpgrade nodejs20Upgrade nodejs20-full-i18nUpgrade nodejs20-debuginfoUpgrade nodejs24-npmUpgrade v8-11.3-develUpgrade nodejs24-develUpgrade nodejs22-libsUpgrade nodejs22-npmUpgrade nodejs22-libs-debuginfoUpgrade nodejs24-libs-debuginfoUpgrade nodejs20-npmUpgrade nodejs24-debuginfoUpgrade nodejs24-libs | Apr 14, 2026 | Mar 30, 2026 |
| Debian | — | Upgrade nodejs | May 17, 2026 | May 17, 2026 |
| Oracle_linux | — | Upgrade nodejsUpgrade nodejs24-npmUpgrade nodejs-develUpgrade nodejs24-develUpgrade v8-13.6-develUpgrade nodejs24Upgrade nodejs24-libsUpgrade nodejs24-full-i18nUpgrade nodejs-packaging-bundlerUpgrade nodejs24-docsUpgrade nodejs-npmUpgrade nodejs-nodemonUpgrade nodejs-libsUpgrade nodejs-docsUpgrade v8-12.4-develUpgrade nodejs-packagingUpgrade nodejs-full-i18nUpgrade npm | Apr 22, 2026 | Mar 30, 2026 |
| Redhat_linux | — | Upgrade nodejs24-develUpgrade nodejs-npmUpgrade v8-12.4-develUpgrade nodejs-full-i18nUpgrade nodejs24-debuginfoUpgrade nodejs24-libs-debuginfoUpgrade npmUpgrade nodejs22-debugsourceUpgrade nodejs24-docsUpgrade nodejs-nodemonUpgrade nodejs24-npmUpgrade nodejs-develUpgrade nodejs-packaging-bundlerUpgrade nodejs24Upgrade nodejs-docsUpgrade nodejs24-libsUpgrade nodejs-libs-debuginfoUpgrade v8-13.6-develUpgrade nodejs-libsUpgrade nodejsUpgrade nodejs22-debuginfoUpgrade nodejs-debuginfoUpgrade nodejs24-debugsourceUpgrade nodejs-packagingUpgrade nodejs-debugsourceUpgrade nodejs24-full-i18n | Apr 9, 2026 | Mar 30, 2026 |
| Rocky_linux | — | Upgrade v8-13.6-develUpgrade nodejs-full-i18nUpgrade npmUpgrade nodejsUpgrade nodejs22-debugsourceUpgrade nodejs-npmUpgrade nodejs-libsUpgrade nodejs24-libsUpgrade nodejs22-debuginfoUpgrade nodejs24-develUpgrade nodejs-develUpgrade nodejs24-debugsourceUpgrade nodejs24-libs-debuginfoUpgrade nodejs-libs-debuginfoUpgrade nodejs24-debuginfoUpgrade nodejs24Upgrade nodejs-debugsourceUpgrade v8-12.4-develUpgrade nodejs24-full-i18nUpgrade nodejs-debuginfo | Apr 13, 2026 | Apr 10, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Mar 30, 2026 |
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