What is CVE-2026-65370?

CVE-2026-65370 is a high-severity vulnerability in Apple Servicetalk, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 7.5/10. Published 2026-08-12.

How severe is CVE-2026-65370?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Apple Servicetalk

CVE-2026-65370

ServiceTalk HTTP/1.x incorrectly handles malformed Transfer-Encoding which could result in request smuggling attacks. This vulnerability is addressed in servicetalk version 0.42.65.

Vulnerability class: HTTP Request Smuggling

Published 2026-08-12 · last modified 2026-09-03.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.003 (25.3th percentile), scored 2026-09-27.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 25.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001

Affected products

Apple Servicetalk — versions 0

Weakness classification (CWE)

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

References

github.com/apple/servicetalk/security/advisories/GHSA-56h2-h3h4-m9x6 (Third Party Advisory)

Frequently asked questions

What is CVE-2026-65370?: CVE-2026-65370 is a high-severity vulnerability in Apple Servicetalk, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 7.5/10. Published 2026-08-12.
How severe is CVE-2026-65370?: High severity. CVSS v3 base score is 7.5 out of 10.