CVE-2025-68121

During session resumption in crypto/tls, if the underlying Config has its ClientCAs or RootCAs fields mutated between the initial handshake and the resumed handshake, the resumed handshake may succeed when it should have failed. This may happen when a user calls Config.Clone and mutates the returned Config, or uses Config.GetConfigForClient. This can cause a client to resume a session with a server that it would not have resumed with during the initial handshake, or cause a server to resume a session with a client that it would not have resumed with during the initial handshake.

CVSS v3 10.0 CRITICAL

10.0^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://go.dev/cl/737700	Patch
https://go.dev/issue/77217	Exploit Issue Tracking
https://groups.google.com/g/golang-announce/c/K09ubi9FQFk	Mailing List Third Party Advisory
https://pkg.go.dev/vuln/GO-2026-4337	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:golang:go::::::::
	cpe:2.3:a:golang:go::::::::
	cpe:2.3:a:golang:go:1.26.0:rc1::::::
	cpe:2.3:a:golang:go:1.26.0:rc2::::::

History

No history.

Information

Published : 2026-02-05 18:16

Updated : 2026-02-20 17:25

NVD link : CVE-2025-68121

Mitre link : CVE-2025-68121

CVE.ORG link : CVE-2025-68121

JSON object : View

Products Affected

golang

go

CWE

CWE-295

Improper Certificate Validation

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