Medium5.9Red Hat Linux

Medium [CVE-2026-21717] Denial of Service via V8 string hashing mechanism due to predictable hash collisions

This medium-severity Red Hat Linux advisory covers CVE-2026-21717 affecting Red Hat Enterprise Linux 1, nodejs20-main, nodejs25-main.

CVE-2026-21717 Published Mar 30, 2026

CVE-2026-21717

Affected products & platforms

Red Hat LinuxUnclassified

Open vendor advisory

Android app · Google Play

Monitor future Red Hat Linux CVEs from your phone.

Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 32 official vendor sources and 160+ reviewed platform categories.

Matching phone alertsOptional email delivery

Get CVE alerts See app features

Summary

Denial of Service via V8 string hashing mechanism due to predictable hash collisions. Red Hat rates this moderate (CVSS 5.9).

Weakness: CWE-328. Affected package(s): nodejs20-main, nodejs25-main, nodejs24, nodejs22-main, nodejs:24, nodejs24-main.

Resolved in Red Hat advisory RHSA-2026:7350 — update the affected packages (`sudo dnf update`).

Affected products named by the advisory: Red Hat Enterprise Linux 1.

Affected versions

nodejs20-main-20.20.0-7.1.hum1
nodejs25-main-25.9.0-1.hum1
nodejs24-1:24.14.1-2.el10_1
nodejs22-main-22.22.0-1.3.hum1
nodejs:24-8100020260408131901.6d880403
nodejs:24-9070020260402152654.rhel9
nodejs24-main-24.14.1-4.hum1

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions

RHSA-2026:7350

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Update the affected package(s) to the fixed version shipped in RHSA-2026:7350 (`sudo dnf update` / `yum update`).

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Discussion(0)

No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.