CVE-2025-58189

low-risk
Published 2025-10-29

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

Do I need to act?

-
0.02% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.3/10 Medium
NETWORK / LOW complexity

Affected Products (1)

Go

Affected Vendors

Golang

References (5)

Patch https://go.dev/cl/707776
Issue Tracking https://go.dev/issue/75652
Mailing List https://groups.google.com/g/golang-announce/c/4Emdl2iQ_bI
Vendor Advisory https://pkg.go.dev/vuln/GO-2025-4008
Mailing List http://www.openwall.com/lists/oss-security/2025/10/08/1
26
/ 100
low-risk
Severity 21/34 · High
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal