HTTP Request Smuggling Vulnerability in Akamai Ghost on CDN Edge Servers
CVE-2025-66373

4.8MEDIUM

Key Information:

Vendor

Akamai

Status
Akamai Ghost
Vendor
CVE Published:
4 December 2025

What is CVE-2025-66373?

Akamai Ghost on Akamai CDN edge servers prior to November 17, 2025, is vulnerable due to a flaw in processing chunked request bodies. This weakness occurs when an invalid chunked body, containing a mismatched chunk size, is received. Under specific conditions, Akamai Ghost may forward the invalid requests along with extraneous bytes to the origin server. This behavior could allow an attacker to disguise a smuggled request within these additional bytes, depending on how the origin server handles the malformed request. The potential for exploitation hinges on the configurations and processing methods employed by the origin server.

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References

https://en.wikipedia.org/wiki/HTTP_request_smuggling
https://www.akamai.com/blog/security/cve-2025-66373-http-...

CVSS V3.1

Score:
4.8
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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