CVE-2023-39321

7.5 highEPSS 1.3%

High (7.5) in golang go. EPSS 1.3% chance of exploitation in the next 30 days. Fixed in stdlib 1.21.1.

Processing an incomplete post-handshake message for a QUIC connection can cause a panic.

Severity

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 1.3% chance of exploitation in the next 30 days; higher than 71% of CVEs (scores of 2026-10-31)
CWE: CWE-400
Published: 2023-09-08
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Advisory	Ecosystem	Package	Affected	Fixed in
GO-2023-2044	Go	stdlib	>=1.21.0-0 <1.21.1	1.21.1