VULNERABILITY INTELLIGENCE
CVE-2025-68121
CVSS score10 CRITICAL
EPSS probability0.90%
CISA KEVNot currently listed
Published2026-02-05
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
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.
Weakness classification
- 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-295
Primary references
- security@golang.org — Patch
- security@golang.org — Exploit, Issue Tracking
- security@golang.org — Mailing List, Third Party Advisory
- security@golang.org — Vendor Advisory