CVE-2025-68121

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.

References

https://github.com/asnaylor/regscout

https://github.com/dcaravel/stackrox-multisource-cves

https://github.com/mjholder/cve-agent

https://github.com/kchrllokesh321/ShieldOps

https://pkg.go.dev/vuln/GO-2026-4337

https://groups.google.com/g/golang-announce/c/K09ubi9FQFk

https://go.dev/issue/77217

https://go.dev/cl/737700

https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-206854

Details

Source: Mitre, NVD

Named Vulnerability: GO-2026-4337Named Vulnerability: GHSA-h355-32pf-p2xm

Risk Information

CVSS v2

CVSS v3

EPSS