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VULNERABILITIES

CVE-2026-56853 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: CISA-ADPCVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://go.dev/cl/795540 [email protected]
https://go.dev/issue/80205 [email protected]
https://groups.google.com/g/golang-announce/c/94pEornpRlI [email protected]
https://pkg.go.dev/vuln/GO-2026-6089 [email protected]

Weakness Enumeration

CWE-IDCWE NameSource
CWE-770Allocation of Resources Without Limits or ThrottlingCISA-ADP

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-56853
NVD Published Date:
Aug 13, 2026
NVD Last Modified:
Sep 3, 2026
Source:
[email protected]
CVE-2026-56853 Details - Not Deferred