# CVE-2025-66373

> CVE-2025-66373. CVSS 4.8 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2025-66373
Last updated: 2026-06-17T09:56:44Z

- Published: 2025-12-04 00:00 UTC · Updated: 2026-06-17 09:56 UTC · Assigner: mitre
- CVSS: 4.8 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
- EPSS: 0.26%, 17th percentile (scored 2026-10-25)
- CISA KEV: no

## Description

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.

## Affected vendors and products

_None listed._

## Tracked companies

- [Akamai](https://rewindex.com/company/akamai.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-66373)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2025-66373)
- [https://en.wikipedia.org/wiki/HTTP\_request\_smuggling](https://en.wikipedia.org/wiki/HTTP_request_smuggling)
- [https://www.akamai.com/blog/security/cve-2025-66373-http-request-smuggling-chunked-body-size](https://www.akamai.com/blog/security/cve-2025-66373-http-request-smuggling-chunked-body-size)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2025-66373 · Markdown: https://rewindex.com/cve/CVE-2025-66373.md · JSON: https://rewindex.com/api/v1/cves/CVE-2025-66373 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:12:52.884Z