CVE-2025-27209
highpriority · track · 0EPSS 0.013 · 69 %ileDEEURUUSEPSS · scored 2026-10-23
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4–7.5
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (21)
Products and version ranges known to be affected.
advisories (3)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2025-1578Node.js: Mehrere SchwachstellenDeutsch2025-07-15csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Node.js ausnutzen, um Sicherheitsvorkehrungen zu umgehen und um einen Denial-of-Service-Zustand zu verursachen.
- BIT-node-2025-272092025-07-22vendor · osvUS
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.
- BIT-node-min-2025-272092025-07-22vendor · osvUS
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.
also known as (6)
Other names and identifiers for this entity.
- CNNVD-202507-2479cnnvd
- EUVD-2025-21940enisa_euvd
- BDU:2025-09383fstec_bdu
- GHSA-qr33-gf7m-pq45enisa_euvd
- BIT-node-2025-27209osv
- BIT-node-min-2025-27209osv
sources
Which sources assert this record, and when.
references (7)
External citations — patches, advisories, analysis.
- https://access.redhat.com/security/cve/cve-2025-27209cnnvd
- https://nodejs.org/en/blog/vulnerability/july-2025-security-releasescnnvd
- https://nodejs.org/zh-cn/downloadPatchcnnvd
- https://vigilance.fr/vulnerability/Node-js-Core-two-vulnerabilities-dated-16-07-2025-47674cnnvd
- https://nodejs.org/en/blog/vulnerability/july-2025-security-releasesenisa_euvd
- http://www.openwall.com/lists/oss-security/2025/07/22/2nvd
- https://nodejs.org/en/blog/vulnerability/july-2025-security-releasesnvd
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan