CVE-2025-58189

ALPN negotiation error contains attacker controlled information in crypto/tls

CVSS 5.3 MEDIUMEPSS 0.4%

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

Affected products

Go standard library · crypto/tls

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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