Vulnerability in Golang Go

CVE-2025-61730

During the TLS 1.3 handshake if multiple messages are sent in records that span encryption level boundaries (for instance the Client Hello and Encrypted Extensions messages), the subsequent messages may be processed before the encryption level changes. This can cause some minor information disclosure if a network-local attacker can inject messages during the handshake.

EPSS: 0.003 (19.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

References

Frequently asked questions

What is CVE-2025-61730?
CVE-2025-61730 is a medium-severity vulnerability in Golang Go, classified under CWE-940: IMPROPER VERIFICATION OF SOURCE OF A COMMUNICATION CHANNEL. CVSS score: 5.3/10. Published 2026-01-28.
How severe is CVE-2025-61730?
Medium severity. CVSS v3 base score is 5.3 out of 10.