High severity · published Feb 26, 2026
CVE-2026-27141
Sending certain HTTP/2 frames can cause a server to panic in golang.org/x/net
7.5
CVSS
0.6%
EPSS
No
On KEV
Description
Due to missing nil check, sending 0x0a-0x0f HTTP/2 frames will cause a running server to panic
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 47% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GO
golang.org/x/net/http2 · golang.org/x/net
0.50.0 before 0.51.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-27141
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-27141
go.dev
https://go.dev/cl/746180
go.dev
https://go.dev/issue/77652
nvd.nist.gov
https://nvd.nist.gov/vuln/detail/CVE-2026-27141
pkg.go.dev
https://pkg.go.dev/vuln/GO-2026-4559
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