What is CVE-2026-26365?

CVE-2026-26365 is a medium-severity vulnerability in Akamai Ghost, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 4.0/10. Published 2026-02-23.

How severe is CVE-2026-26365?

Medium severity. CVSS v3 base score is 4.0 out of 10.

Vulnerability in Akamai Ghost

CVE-2026-26365

Akamai Ghost on Akamai CDN edge servers before 2026-02-06 mishandles processing of custom hop-by-hop HTTP headers, where an incoming request containing the header "Connection: Transfer-Encoding" could result in a forward request with invalid message framing, depending on the Akamai processing path. This could result in the origin server parsing the request body incorrectly, leading to HTTP request smuggling.

Vulnerability class: HTTP Request Smuggling

EPSS: 0.002 (7.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.0 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N.

Affected products

Akamai Ghost — versions 0

Weakness classification (CWE)

CWE-444 — Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling)

References

cve@mitre.org

Frequently asked questions

What is CVE-2026-26365?: CVE-2026-26365 is a medium-severity vulnerability in Akamai Ghost, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 4.0/10. Published 2026-02-23.
How severe is CVE-2026-26365?: Medium severity. CVSS v3 base score is 4.0 out of 10.