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CVE-2025-68121
CRITICAL10.0
Description
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.
CVE Details
CVSS v3.1 Score10.0
SeverityCRITICAL
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack VectorNETWORK
ComplexityLOW
Privileges RequiredNONE
User InteractionNONE
Published2/5/2026
Last Modified2/20/2026
Sourcenvd
Honeypot Sightings0
Affected Products
golang:go
Weaknesses (CWE)
CWE-295
References
https://go.dev/cl/737700(security@golang.org)
https://go.dev/issue/77217(security@golang.org)
https://groups.google.com/g/golang-announce/c/K09ubi9FQFk(security@golang.org)
https://pkg.go.dev/vuln/GO-2026-4337(security@golang.org)
IOC Correlations
No correlations recorded
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