What is GHSA-xphw-4f88-5f39?

GHSA-xphw-4f88-5f39 is a security advisory published by GitHub Security Advisories with High severity. When a server is configured to support unencrypted HTTP/2, it reads a few bytes from each new...

Which CVE IDs does GHSA-xphw-4f88-5f39 cover?

GHSA-xphw-4f88-5f39 covers the following CVE IDs: CVE-2026-56853. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-xphw-4f88-5f39?

GHSA-xphw-4f88-5f39 has a CVSS v3 base score of 7.5, published by GitHub Security Advisories.

GHSA-xphw-4f88-5f39HighCVSS 7.5

When a server is configured to support unencrypted HTTP/2, it reads a few bytes from each new...

Vendor

GitHub Security Advisories

Published

August 14, 2026

Last Modified

August 14, 2026

🔗 CVE IDs covered (1)

CVE-2026-56853 →

📋 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.

🔗 References (6)

https://nvd.nist.gov/vuln/detail/CVE-2026-56853
https://go.dev/cl/795540
https://go.dev/issue/80205
https://groups.google.com/g/golang-announce/c/94pEornpRlI
https://pkg.go.dev/vuln/GO-2026-6089
https://github.com/advisories/GHSA-xphw-4f88-5f39