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ImpactA server can reply with a WebSocket frame using the 64-bit length form and an extremely large length. undici's ByteParser overflows internal math, ends up in an invalid state, and throws a fatal TypeError that terminates the process.
Patches
Patched in the undici version v7.24.0 and v6.24.0. Users should upgrade to this version or later.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade nodejs-develUpgrade nodejs-packaging-bundlerUpgrade nodejs-docsUpgrade v8-13.6-develUpgrade nodejsUpgrade nodejs-packagingUpgrade nodejs-full-i18nUpgrade nodejs-nodemonUpgrade nodejs-libsUpgrade v8-12.4-develUpgrade npm | Apr 16, 2026 | Apr 8, 2026 |
| Amazon_linux_2023 | — | Upgrade nodejs22-npmUpgrade nodejs24Upgrade nodejs24-debuginfoUpgrade nodejs20-full-i18nUpgrade nodejs20-develUpgrade nodejs22-libsUpgrade nodejs22-full-i18nUpgrade v8-12.4-develUpgrade nodejs20-libs-debuginfoUpgrade nodejs22-libs-debuginfoUpgrade nodejs24-debugsourceUpgrade nodejs20-debugsourceUpgrade nodejs24-full-i18nUpgrade v8-11.3-develUpgrade nodejs22Upgrade nodejs24-libs-debuginfoUpgrade nodejs22-debuginfoUpgrade nodejs20-npmUpgrade nodejs20-debuginfoUpgrade nodejs20-docsUpgrade nodejs22-debugsourceUpgrade nodejs22-develUpgrade nodejs20Upgrade nodejs24-npmUpgrade nodejs24-libsUpgrade nodejs24-develUpgrade nodejs22-docsUpgrade v8-13.6-develUpgrade nodejs20-libsUpgrade nodejs24-docs | Apr 7, 2026 | Mar 12, 2026 |
| Oracle_linux | — | Upgrade nodejs-develUpgrade nodejs-nodemonUpgrade nodejs-full-i18nUpgrade v8-12.4-develUpgrade v8-13.6-develUpgrade nodejs-libsUpgrade nodejs-docsUpgrade nodejs-npmUpgrade nodejs24-docsUpgrade nodejs24Upgrade nodejs-packagingUpgrade nodejsUpgrade nodejs24-full-i18nUpgrade npmUpgrade nodejs-packaging-bundlerUpgrade nodejs24-libsUpgrade nodejs24-npmUpgrade nodejs24-devel | Apr 22, 2026 | Mar 12, 2026 |
| Redhat_linux | — | Upgrade v8-12.4-develUpgrade nodejs-docsUpgrade nodejs22-debuginfoUpgrade nodejs-debuginfoUpgrade v8-13.6-develUpgrade nodejs24-debuginfoUpgrade nodejs-nodemonUpgrade nodejs-debugsourceUpgrade nodejs-packagingUpgrade nodejs24-debugsourceUpgrade nodejs-npmUpgrade nodejs-libs-debuginfoUpgrade nodejs-develUpgrade nodejs-full-i18nUpgrade nodejs-libsUpgrade nodejs22-debugsourceUpgrade nodejs24-docsUpgrade nodejs24-libs-debuginfoUpgrade nodejs24-libsUpgrade nodejs-packaging-bundlerUpgrade nodejs24-develUpgrade nodejsUpgrade npmUpgrade nodejs24-npmUpgrade nodejs24Upgrade nodejs24-full-i18n | Apr 9, 2026 | Mar 12, 2026 |
| Rocky_linux | — | Upgrade nodejs-libs-debuginfoUpgrade nodejs24-debugsourceUpgrade nodejs-develUpgrade nodejs-npmUpgrade nodejs-libsUpgrade v8-13.6-develUpgrade nodejs22-debuginfoUpgrade nodejs24Upgrade v8-12.4-develUpgrade nodejs-debuginfoUpgrade nodejs24-libsUpgrade npmUpgrade nodejs24-develUpgrade nodejs24-libs-debuginfoUpgrade nodejs22-debugsourceUpgrade nodejsUpgrade nodejs24-debuginfoUpgrade nodejs-full-i18nUpgrade nodejs24-full-i18nUpgrade nodejs-debugsource | Apr 13, 2026 | Apr 10, 2026 |
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