CVE-2025-68121
10.0 · CRITICALOverview
CVE-2025-68121 is a critical-severity vulnerability affecting golang go. It was published on February 5, 2026 and has a CVSS 3.1 base score of 10.0 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 10.0, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from golang. Update go to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| golang | go | >= 0, < 1.24.13 | Affected |
Frequently Asked Questions
What is CVE-2025-68121?
CVE-2025-68121 is a critical-severity vulnerability affecting golang go. It was published on February 5, 2026 and has a CVSS 3.1 base score of 10.0 (CRITICAL).
How severe is CVE-2025-68121?
This vulnerability has a CVSS 3.1 base score of 10.0, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2025-68121?
Check the references section for vendor advisories and patches from golang. Update go to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2025-68121?
CyberStrike's AI-powered security agents can automatically detect CVE-2025-68121 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
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