Unrated severityNVD Advisory· Published Oct 29, 2025· Updated Nov 4, 2025

ALPN negotiation error contains attacker controlled information in crypto/tls

CVE-2025-58189

Description

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

Affected products

Go standard library/crypto/tlsv5
Range: 0

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

go.dev/cl/707776mitre
go.dev/issue/75652mitre
groups.google.com/g/golang-announce/c/4Emdl2iQ_bImitre
pkg.go.dev/vuln/GO-2025-4008mitre

News mentions

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