CVSS 3.1
10.0 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HCVE-2025-68121
Critical (10.0) in golang go. EPSS 0.9% chance of exploitation in the next 30 days. Fixed in stdlib 1.24.13, 1.25.7, 1.26.0-rc.3.
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.
Severity
- EPSS
- 0.9% chance of exploitation in the next 30 days; higher than 60% of CVEs (scores of 2026-10-31)
- CWE
- CWE-295
- Published
- Modified
- Record from
- the NVD, synced
Affected
- golang:go
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GO-2026-4337 | Go | stdlib | <1.24.13 >=1.25.0-0 <1.25.7 >=1.26.0-rc.1 <1.26.0-rc.3 | 1.24.13, 1.25.7, 1.26.0-rc.3 |