CVE-2026-56853
Apply ReadHeaderTimeout when doing unencrypted HTTP/2 check in net/http
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.
No summary for this CVE yet.
CVSS Vector Breakdown
Exploitability
AV:NAttack VectorNetwork
AC:LAttack ComplexityLow
PR:NPrivileges RequiredNone
UI:NUser InteractionNone
Scope
S:UScopeUnchanged
Impact
C:NConfidentialityNone
I:NIntegrityNone
A:HAvailabilityHigh
Weaknesses
Affected Products
Go standard library
oss-project·USaka golang standard library, net/http, html/template, crypto/x509
Exploitability
No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
Attack Graph
Products CVE Techniques Tactics
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MITRE ATT&CK
1 technique Impact
References
https://go.dev/cl/795540
go.dev
https://go.dev/issue/80205
go.dev
https://groups.google.com/g/golang-announce/c/94pEornpRlI
groups.google.com
and 1 more references View all →
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