CVE-2025-27209
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductNode
PublishedJul 18, 2025
First seenJul 18, 2025
Weakness typeCWE-407CWE-407
How to fix
Update
- nodejs node24.4.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| nodejs node | 24.0.0 ≤ v < 24.4.1 | 24.4.1 |
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