What is CVE-2025-58189?

CVE-2025-58189 is a medium-severity vulnerability in Golang Go, classified under Insertion of Sensitive Information into Log File. CVSS score: 5.3/10. Published 2025-10-29.

How severe is CVE-2025-58189?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Information disclosure in Golang Go

CVE-2025-58189

When Conn.Handshake fails during ALPN negotiation the error contains attacker controlled information (the ALPN protocols sent by the client) which is not escaped.

Published 2025-10-29 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.005 (38.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.000

Affected products

Golang Go
Go Standard Library Crypto/tls — versions 0, 1.25.0

Weakness classification (CWE)

CWE-532 — Insertion of Sensitive Information into Log File

References

go.dev/cl/707776 (Patch)
go.dev/issue/75652 (Issue Tracking)
groups.google.com/g/golang-announce/c/4Emdl2iQ_bI (Mailing List, Release Notes)
pkg.go.dev/vuln/GO-2025-4008 (Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Release Notes, Third Party Advisory)

Frequently asked questions

What is CVE-2025-58189?: CVE-2025-58189 is a medium-severity vulnerability in Golang Go, classified under Insertion of Sensitive Information into Log File. CVSS score: 5.3/10. Published 2025-10-29.
How severe is CVE-2025-58189?: Medium severity. CVSS v3 base score is 5.3 out of 10.