CVE-2025-66373: Akamai Ghost on Akamai CDN edge servers before 2025-11-17 has a chunked request body processing error that can result…
CVE-2025-66373 · Severity: medium · CVSS 4.8 · Published 2025-12-04
Akamai Ghost on Akamai CDN edge servers before 2025-11-17 has a chunked request body processing error that can result in HTTP request smuggling. When Akamai Ghost receives an invalid chunked body that includes a chunk size different from the actual size of the following chunk data, under certain circumstances, Akamai Ghost erroneously forwards the invalid request and subsequent superfluous bytes to the origin server. An attacker could hide a smuggled request in these superfluous bytes. Whether this is exploitable depends on the origin server's behavior and how it processes the invalid request it receives from Akamai Ghost.
No. Junglewise Threat Intelligence has no report of CVE-2025-66373 being exploited in the wild.
How severe is CVE-2025-66373?
Medium severity, with a CVSS score of 4.8, published 4 December 2025.
Which products and versions are affected?
Akamaighost. The advisory does not name versions.
Is there a fix for CVE-2025-66373?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2025-66373?
Check whether you run Akamaighost. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.