Medium
ALPN negotiation error contains attacker controlled information in crypto/tls
Type: advisorySources: OSV
When Conn.Handshake fails during ALPN negotiation the error contains attacker controlled information (the ALPN protocols sent by the client) which is not escaped.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2025-58189
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 01:32 UTC · Revision 1
Source evidence
ALPN negotiation error contains attacker controlled information in crypto/tls
core-osv · Original sourcePublished 29 Oct 2025, 22:10 UTC
When Conn.Handshake fails during ALPN negotiation the error contains attacker controlled information (the ALPN protocols sent by the client) which is not escaped.
osv:CVE-2025-58189
Complete source record
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"id": "4aa7d738faa046d689d386e3dd30c24c9f4a7563e660289ed630e637d18a74e5",
"url": "https://osv.dev/vulnerability/CVE-2025-58189",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "ALPN negotiation error contains attacker controlled information in crypto/tls",
"summary": "When Conn.Handshake fails during ALPN negotiation the error contains attacker controlled information (the ALPN protocols sent by the client) which is not escaped.",
"evidence": "osv:CVE-2025-58189",
"products": [],
"severity": "medium",
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"CVE-2025-58189",
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"modified": "2026-10-28T02:30:24.983946791Z",
"provider": "osv",
"references": [
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"https://go.dev/issue/75652",
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"source_id": "core-osv",
"document_id": 491650,
"published_at": "2025-10-29T22:10:12.947+00:00"
}