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.

CVSS 3.1

5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS

0.5% chance of exploitation in the next 30 days; higher than 40% of CVEs (scores of 2026-10-25)

CWE

CWE-532

Published

2025-10-29

Modified

2026-10-08

Record from

the NVD, synced 2026-10-19

Affected

• golang:go

Packages (OSV)

References

• https://go.dev/cl/707776
• https://go.dev/issue/75652
• https://groups.google.com/g/golang-announce/c/4Emdl2iQ_bI
• https://pkg.go.dev/vuln/GO-2025-4008
• http://www.openwall.com/lists/oss-security/2025/10/08/1

Check your stackJSON