Medium 5.3Published Oct 29, 2025

CVE-2025-58189ALPN negotiation error contains attacker controlled information in crypto/tls

Updated under an hour ago (Oct 27, 2026, 7:30 AM ET)

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It affects Go standard library crypto/tls and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Go standard library crypto/tls

Exploited in the last 30 days

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: 5.3 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness (CWE): CWE-117
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Go
NVD analysis: Analyzed
Record last updated: Nov 4, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Go standard library crypto/tls go_standard_library:crypto_tls (from the name)	before 1.24.8; from 1.25.0 before 1.25.2	CNA record
golang go golang:go	before 1.24.8; from 1.25.0 before 1.25.2	NVD

References

References

https://go.dev/cl/707776	patch
https://go.dev/issue/75652	issue-tracking
https://groups.google.com/g/golang-announce/c/4Emdl2iQ_bI	mailing-list, release-notes
https://pkg.go.dev/vuln/GO-2025-4008	vendor-advisory
http://www.openwall.com/lists/oss-security/2025/10/08/1	mailing-list, release-notes, third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.