A flaw in Node.js HMAC verification uses a non-constant-time comparison when validating user-provided signatures, potentially leaking timing information proportional to the number of matching bytes. Under certain threat models where high-resolution timing measurements are possible, this behavior could be exploited as a timing oracle to infer HMAC values. Node.js already provides timing-safe comparison primitives used elsewhere in the codebase, indicating this is an oversight rather than an intentional design decision. This vulnerability affects **20.x, 22.x, 24.x, and 25.x**.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade nodejs-develUpgrade nodejsUpgrade v8-13.6-develUpgrade nodejs-packaging-bundlerUpgrade nodejs-docsUpgrade nodejs-packagingUpgrade nodejs-full-i18nUpgrade npmUpgrade nodejs-libsUpgrade nodejs-nodemon | Apr 16, 2026 | Apr 9, 2026 |
| Alpine Linux | — | Upgrade nodejs | Mar 31, 2026 | Mar 30, 2026 |
| Amazon_linux_2023 | — | Upgrade nodejs20-libsUpgrade nodejs22-npmUpgrade nodejs20-docsUpgrade nodejs22-full-i18nUpgrade nodejs20-debugsourceUpgrade nodejs24-docsUpgrade nodejs22-docsUpgrade nodejs24-libsUpgrade nodejs24-debugsourceUpgrade nodejs22Upgrade nodejs24-debuginfoUpgrade nodejs22-libsUpgrade v8-11.3-develUpgrade nodejs20-npmUpgrade nodejs24-libs-debuginfoUpgrade nodejs20-develUpgrade nodejs20-debuginfoUpgrade nodejs22-debugsourceUpgrade nodejs20-libs-debuginfoUpgrade v8-13.6-develUpgrade nodejs24-develUpgrade nodejs24Upgrade nodejs22-debuginfoUpgrade nodejs20Upgrade nodejs24-full-i18nUpgrade nodejs20-full-i18nUpgrade nodejs22-libs-debuginfoUpgrade nodejs22-develUpgrade v8-12.4-develUpgrade nodejs24-npm | Apr 14, 2026 | Mar 30, 2026 |
| Debian | — | Upgrade nodejs | May 17, 2026 | May 17, 2026 |
| Oracle_linux | — | Upgrade nodejsUpgrade nodejs24-npmUpgrade nodejs-docsUpgrade nodejs24-full-i18nUpgrade nodejs-develUpgrade v8-13.6-develUpgrade nodejs24Upgrade nodejs24-libsUpgrade nodejs24-develUpgrade nodejs-packaging-bundlerUpgrade nodejs-full-i18nUpgrade nodejs24-docsUpgrade nodejs-libsUpgrade nodejs-packagingUpgrade nodejs-nodemonUpgrade npm | Apr 22, 2026 | Mar 30, 2026 |
| Redhat_linux | — | Upgrade nodejs24-libsUpgrade nodejs24-full-i18nUpgrade v8-13.6-develUpgrade nodejs24-develUpgrade nodejs-debuginfoUpgrade nodejsUpgrade nodejs-libs-debuginfoUpgrade nodejs-debugsourceUpgrade nodejs-develUpgrade nodejs-packagingUpgrade nodejs24Upgrade nodejs-packaging-bundlerNo solution existsUpgrade nodejs24-debugsourceUpgrade nodejs-docsUpgrade nodejs24-libs-debuginfoUpgrade npmUpgrade nodejs-libsUpgrade nodejs24-npmUpgrade nodejs24-docsUpgrade nodejs24-debuginfoUpgrade nodejs-full-i18nUpgrade nodejs-nodemon | Apr 13, 2026 | Mar 30, 2026 |
| Rocky_linux | — | Upgrade nodejs-debugsourceUpgrade nodejs-develUpgrade nodejs-debuginfoUpgrade nodejs24-debugsourceUpgrade nodejs-libs-debuginfoUpgrade nodejs-full-i18nUpgrade v8-13.6-develUpgrade nodejs24-debuginfoUpgrade nodejs24-libs-debuginfoUpgrade nodejs24-libsUpgrade nodejs24-develUpgrade nodejs24Upgrade nodejs24-full-i18nUpgrade nodejs-libsUpgrade nodejs | 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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