Hash Collision Vulnerability in Node.js by Joyent
CVE-2025-27209

7.5HIGH

Key Information:

Vendor

Nodejs

Status
Node
Vendor
CVE Published:
18 July 2025

Badges

đź“° News Worthy

What is CVE-2025-27209?

The latest release of Node.js v24.0.0 introduces a critical flaw in the string hashing mechanism due to changes in the V8 engine's rapidhash implementation. This flaw allows attackers to control string inputs, which can lead to numerous hash collisions, compromising application performance and security. By exploiting this vulnerability, an attacker can intentionally generate hash collisions, crippling services and making them susceptible to denial-of-service attacks.

Affected Version(s)

node 24.0.0 < 24.4.1

News Articles

favicon imageGBHackers News

Node.js Vulnerabilities Leave Windows Apps Vulnerable to Path Traversal and HashDoS

The Node.js project has released critical security updates across multiple release lines to address two high-severity vulnerabilities.

3 days ago

References

https://nodejs.org/en/blog/vulnerability/july-2025-securi...

CVSS V3.0

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • đź“°

    First article discovered by GBHackers News

  • Vulnerability Reserved

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CVE-2025-27209 : Hash Collision Vulnerability in Node.js by Joyent