Medium severity5.9NVD Advisory· Published Mar 30, 2026· Updated May 10, 2026
CVE-2026-21717
CVE-2026-21717
Description
A flaw in V8's string hashing mechanism causes integer-like strings to be hashed to their numeric value, making hash collisions trivially predictable. By crafting a request that causes many such collisions in V8's internal string table, an attacker can significantly degrade performance of the Node.js process.
The most common trigger is any endpoint that calls JSON.parse() on attacker-controlled input, as JSON parsing automatically internalizes short strings into the affected hash table.
This vulnerability affects 20.x, 22.x, 24.x, and 25.x.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
36- osv-coords35 versionspkg:apk/chainguard/nodejs-22pkg:apk/wolfi/nodejs-22pkg:bitnami/nodepkg:bitnami/node-minpkg:rpm/almalinux/nodejspkg:rpm/almalinux/nodejs24pkg:rpm/almalinux/nodejs24-develpkg:rpm/almalinux/nodejs24-docspkg:rpm/almalinux/nodejs24-full-i18npkg:rpm/almalinux/nodejs24-libspkg:rpm/almalinux/nodejs24-npmpkg:rpm/almalinux/nodejs-develpkg:rpm/almalinux/nodejs-docspkg:rpm/almalinux/nodejs-full-i18npkg:rpm/almalinux/nodejs-libspkg:rpm/almalinux/nodejs-nodemonpkg:rpm/almalinux/nodejs-packagingpkg:rpm/almalinux/nodejs-packaging-bundlerpkg:rpm/almalinux/npmpkg:rpm/almalinux/v8-13.6-develpkg:rpm/opensuse/nodejs24&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/nodejs24&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/nodejs26&distro=openSUSE%20Tumbleweedpkg:rpm/suse/nodejs20&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-ESPOSpkg:rpm/suse/nodejs20&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-LTSSpkg:rpm/suse/nodejs20&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP5-LTSSpkg:rpm/suse/nodejs20&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP6-LTSSpkg:rpm/suse/nodejs20&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP5pkg:rpm/suse/nodejs20&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP6pkg:rpm/suse/nodejs22&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Web%20and%20Scripting%2015%20SP7pkg:rpm/suse/nodejs22&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP6-LTSSpkg:rpm/suse/nodejs22&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP6pkg:rpm/suse/nodejs24&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Web%20and%20Scripting%2015%20SP7pkg:rpm/suse/nodejs24&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/nodejs24&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0
< 22.22.3-r0+ 34 more
- (no CPE)range: < 22.22.3-r0
- (no CPE)range: < 22.22.3-r0
- (no CPE)range: < 20.20.2
- (no CPE)range: < 20.20.2
- (no CPE)range: < 1:24.14.1-2.module_el9.7.0+222+ef1c61e1
- (no CPE)range: < 1:24.14.1-2.el10_1
- (no CPE)range: < 1:24.14.1-2.el10_1
- (no CPE)range: < 1:24.14.1-2.el10_1
- (no CPE)range: < 1:24.14.1-2.el10_1
- (no CPE)range: < 1:24.14.1-2.el10_1
- (no CPE)range: < 1:11.11.0-1.24.14.1.2.el10_1
- (no CPE)range: < 1:24.14.1-2.module_el9.7.0+222+ef1c61e1
- (no CPE)range: < 1:24.14.1-2.module_el9.7.0+222+ef1c61e1
- (no CPE)range: < 1:24.14.1-2.module_el9.7.0+222+ef1c61e1
- (no CPE)range: < 1:24.14.1-2.module_el9.7.0+222+ef1c61e1
- (no CPE)range: < 3.0.3-3.module_el9.7.0+209+ecf6523e
- (no CPE)range: < 2021.06-6.module_el9.7.0+209+ecf6523e
- (no CPE)range: < 2021.06-6.module_el9.7.0+198+8bf605ba
- (no CPE)range: < 1:11.11.0-1.24.14.1.2.module_el9.7.0+222+ef1c61e1
- (no CPE)range: < 3:13.6.233.17-1.24.14.1.2.module_el9.7.0+222+ef1c61e1
- (no CPE)range: < 24.14.1-160000.1.1
- (no CPE)range: < 24.14.1-1.1
- (no CPE)range: < 26.3.1-1.1
- (no CPE)range: < 20.20.2-150500.11.27.1
- (no CPE)range: < 20.20.2-150500.11.27.1
- (no CPE)range: < 20.20.2-150500.11.27.1
- (no CPE)range: < 20.20.2-150600.3.18.1
- (no CPE)range: < 20.20.2-150500.11.27.1
- (no CPE)range: < 20.20.2-150600.3.18.1
- (no CPE)range: < 22.22.2-150700.3.9.1
- (no CPE)range: < 22.22.2-150600.13.15.1
- (no CPE)range: < 22.22.2-150600.13.15.1
- (no CPE)range: < 24.14.1-150700.15.8.1
- (no CPE)range: < 24.14.1-160000.1.1
- (no CPE)range: < 24.14.1-160000.1.1
Patches
Vulnerability mechanics
References
1News mentions
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