The V8 release used in Node.js v24.0.0 has changed how string hashes are computed using…
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.0 · CNA. Fix status from CNA. Impact type from CWE-407.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA node (nodejs) Fixed in 24.4.1
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 3 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2025-27209
- 2026-10-03 Alias added: GHSA-qr33-gf7m-pq45
References
More NodeJS vulnerabilities
- TI-2026-79288 Out-of-bounds write in Google Brotli decoder KEVCVSS 4.0CRITICAL 9.2
- TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
- TI-2024-18584 Race condition in NodeJS Node CVSS 3.0HIGH 8.2
- TI-2016-01993 The DES and Triple DES ciphers, as used in the TLS, SSH, and IPSec protocols and other… CVSS 3.1HIGH 7.5
- TI-2024-03325 Command injection vulnerability in programing languages on Microsoft Windows operating system. CVSS 3.1CRITICAL 9.8
- TI-2022-03472 X.509 Email Address Variable Length Buffer Overflow CVSS 3.1HIGH 7.5
Sources
- CVE-2025-27209 · CVE Program
- CVE-2025-27209 · NVD
- FIRST EPSS
- GHSA-qr33-gf7m-pq45 · GitHub Advisory Database · CC BY 4.0
- CVE-2025-27209 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences