VULNERABILITY INTELLIGENCE
CVE-2026-56853
CVSS score7.5 HIGH
EPSS probability0.57%
CISA KEVNot currently listed
Published2026-08-13
Last modified2026-09-03
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Description
When a server is configured to support unencrypted HTTP/2, it reads a few bytes from each new connection to see if they contain the HTTP/2 client preface. ReadHeaderTimeout is unexpectedly not being applied when doing this.
Weakness classification
- 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-770