CVE-2026-38969: ruby webrick through v1.9.2 WEBrick reparses trailer Content-Length into canonical request state, enabling request smuggling.

Overview

Severity

High (CVSS 7.5)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U

Exploit Status

Not Exploited

Patch Tuesday

2026-Jul

Released

2026-07-09

EPSS Score

0.29% (percentile: 20.7%)

Affected Products (2)

Other

• 21312-17084
• 21569-17084

Revision History

• 2026-07-09: Information published.