CVE-2025-27209
7.5
HIGH
CVSS 3.1
EPSS 0.15%
Description
The V8 release used in Node.js v24.0.0 has changed how string hashes are computed using rapidhash. This implementation re-introduces the HashDoS vulnerability as an attacker who can control the strings to be hashed can generate many hash collisions - an attacker can generate collisions even without knowing the hash-seed. * This vulnerability affects Node.js v24.x users.
How to fix CVE-2025-27209
To remediate CVE-2025-27209, upgrade the affected package to a fixed version below.
- —upgrade to 24.4.1 or later
- —upgrade to 24.4.1 or later
Is CVE-2025-27209 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- >= 24.0.0, < 24.4.1
- >= 24.0.0, < 24.4.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |