Denial of Service Vulnerability in Oak Middleware Framework for Deno, Node.js, Cloudflare Workers, and Bun
CVE-2025-55152

5.3MEDIUM

Key Information:

Vendor

Oakserver

Status
Oak
Vendor
CVE Published:
9 August 2025

What is CVE-2025-55152?

In versions 17.1.5 and earlier of the Oak middleware framework, a vulnerability exists that can be exploited to significantly degrade server performance. This occurs when specially crafted values are sent through the x-forwarded-proto or x-forwarded-for headers, leading to a denial of service condition on the server. The affected environments include Deno's native HTTP server, Deno Deploy, Node.js starting from version 16.5, Cloudflare Workers, and Bun. It is crucial for users to upgrade to the latest version to mitigate this risk.

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Affected Version(s)

oak < 17.1.6

References

https://github.com/oakserver/oak/security/advisories/GHSA...
x_refsource_CONFIRM
https://github.com/oakserver/oak/commit/b60e60330ef227707...
x_refsource_MISC

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

JSON
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